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权问薇
2018年05月24日
权问薇
[图片]一、养殖环境 1、土壤：最好用疏松、排水性较好的沙质土壤，选择酸性土壤最佳。 2、浇水：在干旱天气时要及时浇水，在雨季天气要及时排水；在孕蕾前后阶段要保证充足的水分，土壤不能过干或过湿；如果因为浇水量大导致积水出现，要及时采取排水措施，以免出现烂根。 3、施肥：在生长期间要保证充足的养分，以氮肥为主，磷钾肥为辅。这可以使菊花的枝条更加健壮，在施肥后要适当浇水。 4、光照：每天给它12小时左右的光照，但是不能让它被强烈的阳光照射，否则可能会缩短它的花期。 [图片]二、繁殖方法 1、扦插繁殖：把插穗插到盆土中，将土壤压实，扦插完后适量浇水，维持花土湿润，白天最好将花盆放在室内，以免被强光照射。 2、分根繁殖：把母株挖起，选择根须多的菊苗取下栽种，之后将土压实并适量浇水即可。 [图片]三、常见病虫害 一般常见的病虫害为褐斑病、白粉病、蚜虫等，多是因为光照不足、没有通风、昼夜温差大引起的，可以用多菌灵等药剂防治，平时也要注意加强通风，给它充足的光照。 [图片]
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权问薇
2018年05月24日
权问薇
[图片]一、养殖环境 1、土壤：可以用肥沃疏松、保水保肥的微酸性土壤。 2、浇水：春天间隔2-3天浇一次水，夏天可根据情况每天早晚浇水，秋天间隔3-4天浇一次水，冬季浇水量要减少，大概间隔15-20天浇一次水；夏天温度高的时候可以向室内四周喷洒水，以此提高空气中湿度。在浇水前看土壤的湿润度，如果土壤湿润就不必浇水，若土壤较干燥就适量浇水。 3、施肥：要施已腐熟的饼肥水，在9-10月份可以适量施基肥，初春时可以施复合肥，每年换盆的时候要在花盆底部施已腐熟的固体有机肥。 4、光照：红豆杉不能接受强光暴晒，在阳光强烈的地方要适当采取遮荫措施。 [图片]二、繁殖方法 1、播种繁殖：将种子贮藏一段时间再进行播种。先将消毒过的种子放在土壤内，然后盖上湿沙，再盖上8厘米左右厚的土，在幼苗时期要避免强光照射，留床2年进行移栽。 2、扦插繁殖：将选择好的插穗栽到扦插土里，用薄膜盖上，要避免被强烈的阳光照射，每天适量喷洒水，给它20-30℃的生长环境，大概一个月左右就会长出根了，等幼苗长出根后就能移植了。 [图片]三、常见病虫害 1、常见病害：白绢病、茎腐病等最为严重，在发病后及时喷洒杀菌药物，同时要降低土壤的温度，避免会灼伤根部，还要及时将病叶清理掉，以免出现二次感染。 2、常见虫害：蚜虫、介壳虫等，会危害到它的正常生长，可以适当的养点蚜虫的天敌，有效预防蚜虫的出现，还可以用药剂喷杀蚜虫。 [图片]
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权问薇
2018年05月24日
权问薇
[图片]一、养殖环境 1、土壤：养殖百合适合用排水性好、含有丰富腐殖质的沙质土壤，最好选择酸性土壤，有利于它更好生长。 2、温度：将温度控制在16～24℃最佳，若是低于5℃或高于30℃，它就会停止生长。 3、光照：百合花喜欢充足的阳光照射，若光照时间短就会影响到花芽的分化，还会影响花朵的正常生长，最好将它放在阳光充足的地方。 4、浇水：要维持花土湿润，夏秋季节可以早晚各浇水一次，春冬季节浇水前要看土壤的湿润度，若土壤干燥就适当浇水，温度高时适当的向四周喷水，降低温度。 [图片]二、繁殖方法 1、播种繁殖：采集种子贮藏好，等来年春天进行播种，播种之后大概20-30天就会发芽了，在幼苗时期要为其遮荫，等入秋时就可以进行分栽了。 2、扦插繁殖：挖出鳞茎之后将鳞片掰下来，等晾干后将它扦插在准备好的土壤中，浇上一定的水，大概1个月半的时间就会生根。 [图片]三、常见病害 1、斑点病：叶片上会有褐色的斑点，还会使整个叶片变黑并枯死，发现后要立马将病叶摘掉，配合代森锌可湿性粉剂喷洒。 2、鳞茎腐烂病：在它的鳞茎部位出现褐色的病斑，严重时会变腐烂，在发病后可以用代森锌进行喷洒。 [图片]
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Miss Chen
2018年05月23日
Miss Chen
Description: This herbaceous perennial plant is unbranched and up to 2½' tall. The central stem is ascending, rather than stiffly erect. It is green to light green, slightly hairy, and sometimes zigzags between the alternate leaves. These leaves are up to 6" long and 3" across. They are broadly ovate, smooth along the margins, and usually glabrous on the upper surface. Their venation is parallel, while at the base they are mostly sessile against the stem. The central stem terminates in a rather flat panicle of 20-80 white flowers. This panicle is about 4" long and 2" across; its whitish green stalks are softly hairy. Each flower is about 1/6" across, consisting of 6 tepals, 6 stamens, and a central pistil with a short stout style. These floral parts are white, except for the anthers of the stamens, which are cream or pale yellow. The filaments of the stamens are narrowly triangular, while the tepals are oblong-linear. The blooming period occurs from late spring to early summer and lasts about 3 weeks. Each flower is replaced by a few-seeded berry. Individual berries are about ¼" across and globular; they become bright red, or red and purple-striped at maturity. The root system consists of stout rhizomes with secondary fibrous roots. This plant sometimes forms loose vegetative colonies. Cultivation: The preference is light shade to partial sun, moist to slightly dry conditions, and a fertile loamy soil with abundant organic material (i.e., decaying leaves). Sandy and rocky soil are also tolerated. Range & Habitat: False Solomon's Seal is a common plant that occurs in every county of Illinois (see Distribution Map), where it is native. Habitats include mesic to dry deciduous woodlands, rocky wooded slopes, bluffs, and Black Oak foredunes near Lake Michigan. [图片]Faunal Associations: The flowers are pollinated by small bees, flies, and beetles. The bees collect pollen from the flowers, while flies and beetles feed on pollen. The flowers appear to attract more than the usual number of beetles, including Seed Beetles, Long-Horned Beetles, Click Beetles, Blister Beetles, Tumbling Flower Beetles, Flower Scarab Beetles (Trichiotinus spp.), and Pedilid Beetles (Pedilus spp.). The berries are eaten occasionally by woodland birds, including the Ruffed Grouse and Veery; they are also eaten by the White-Footed Mouse. These animals spread the seeds into new areas. The foliage is browsed occasionally by the White-Tailed Deer. Photographic Location: Along the slope of a wooded bluff in Vermilion County, Illinois. [图片]Comments: This interesting plant produces attractive flowers and berries. It has a similar appearance to Smilacina stellata (Starry False Solomon's Seal), but the latter species produces a raceme of flowers, rather than a branching panicle. The flowers of Starry False Solomon's Seal are somewhat larger in size and fewer in number (less than 20 per raceme), and its leaves are more narrow. Another species, Polygonatum commutatum (Solomon's Seal), has very similar foliage, but its leaves slightly clasp the central stem. The flowers of Solomon's Seal have a very different appearance; their corolla is tubular-shaped and greenish white. Furthermore, the flowers of Solomon's Seal hang from the central stem in small umbels of 1-5 flowers; these umbels develop from the base of each leaf. The scientific name of Smilacina racemosa is something of a misnomer as this species produces flowers in panicles, rather than racemes. Another common name for this species is Solomon's Plume, although it appears to be passing out of fashion.
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Miss Chen
2018年05月23日
Miss Chen
Description: This herbaceous plant is ½–2' tall and more or less erect. It branches at the base, where a tuft of basal leaves occurs, and toward the apex of the stems, where the flowers occur. The stems are terete and quite pubescent. The basal leaves and lower cauline leaves are up to 6" long and 1" across. They are medium to dark green, oblanceolate, and smooth along their margins. Each of these leaves tapers gradually to a petiole-like base. The upper cauline leaves are lanceolate or oblong, sessile, and smaller in size, otherwise they are similar to the lower leaves. The cauline leaves occur in opposite pairs along the stems; there are usually 2-4 pairs of cauline leaves per stem (rarely more). Young leaves are often finely pubescent, but they become nearly hairless with age. Each of the upper stems terminates in a cyme of 3-10 flowers; both the branches and pedicels of each cyme are terete and quite pubescent. The flowers are loosely arranged in each cyme, which is often wider than it is tall. Each flower is about ¾–1" long and 1–1½" across, consisting of 5 spreading red petals, a tubular green calyx, 10 stamens, and 3 styles. The petals are rather narrow and notched at their tips; at the base of each petal, there is a pair of small red teeth. The tubular calyx has several ridges along its length and several small teeth along its outer rim. The outer surface of this calyx is densely covered with a glandular pubescence that has a sticky texture. The blooming period occurs from late spring to mid-summer and lasts about 1½ months. Each flower is replaced by a seed capsule with 6 small teeth along its upper rim. It is broader toward the top than the bottom, and contains several seeds. Each seed is somewhat flattened and orbicular-reniform in shape; its surface is warty or pebbly. The root system consists of a taproot with secondary roots. Cultivation: The preference is partial sun, mesic to dry conditions, and a rather poor soil containing too much sand, clay, or rocky material. Fire Pink can be short-lived as a perennial, but it occasionally reseeds itself. [图片]Range & Habitat: The native Fire Pink is an uncommon plant that occurs in scattered areas of NE, central, and southern Illinois (see Distribution Map). Occasionally, small colonies of this species are discovered in new areas, although its population within the state isn't expanding. Habitats include openings in upland woodlands, rocky wooded slopes, thinly wooded bluffs, limestone and sandstone cliffs, and clay banks along trails in wooded areas. Fire Pink often occurs along slopes and barren areas where there is scant ground vegetation. Populations of this species will decline if the overhead canopy of trees becomes too dense; some disturbance from fire and other causes is probably beneficial. Faunal Associations: Little information is available about floral-faunal relationships. The flowers are probably cross-pollinated by the Ruby-throated Hummingbird and various large butterflies, which seek nectar from the flowers. The sticky hairs on the surface of the calyx discourage ants from climbing up the flower to steal nectar. [图片]Photographic Location: The upper slope of a wooded bluff in Vermilion County, Illinois, and a clay embankment along a trail in a wooded area of the same county. Comments: Fire Pink produces spectacular red flowers. For some reason, it is not often seen in flower gardens, where introduced Pink species are typically grown. Another native species that occurs in Illinois, Silene regia (Royal Catchfly), has a somewhat similar appearance with striking red flowers, but it has 8 or more pairs of leaves along its stems and the tips of its petals are not notched. An introduced species with red flowers, Lychnis chalcedonica (Maltese Cross), is occasionally grown in flower gardens, from which it rarely escapes. Its flowers have petals that are even more deeply notched than those of Fire Pink. Maltese Cross produces its flowers in a dense globoid cluster at the apex of its central stem, and its ovate-lanceolate leaves are much broader at the base than those of Fire Pink.
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Miss Chen
2018年05月23日
Miss Chen
Description: This herbaceous perennial plant is 1–2½' tall and usually erect. It is unbranched or branched sparingly. The terete central stem and any lateral stems are mostly pale green to pale reddish green, hairless to densely pubescent, and somewhat swollen at the bases of leaves, where it is sometimes reddish purple. The lowermost and uppermost leaves are usually opposite, while the middle leaves occur in whorls of 4. They are up to 4" long and 1½" across, elliptic or lanceolate in shape, smooth along the margins, and sessile. The upper surface of each leaf is yellowish green, greyish green, or medium green, and hairless, while the lower leaf surface is more pale and hairless to finely pubescent. The central stem terminates in a panicle of flowers up to 8" long and about 3-4" across. On robust plants, 1-2 additional panicles may be produced from upper lateral stems. Pairs of small leafy bracts occur wherever a panicle branches. The erect central stalk, ascending branches, and clustered pedicels of the panicle are pale to medium green, terete, and hairless to finely pubescent. The flowers occur individually or in groups of 2-3 at the tips of long lateral branches on short pedicels. These pedicels are less than ¼" long. Each flower is about ¾" across, consisting of 5 white fringed petals, a light green calyx that is bell-shaped (campanulate) with 5 broad teeth along its upper rim, a pistil with 3 slender white styles, and 10 stamens with slender white filaments. Each fringed petal has 8-12 linear lobes along its broad outer edge, while at the base it becomes quite narrow. The outer surface of each calyx is light green and hairless to finely pubescent; it often has faint longitudinal veins that are a darker shade of green. The blooming period occurs during mid- to late summer, lasting about 3-4 weeks. There is no noticeable floral scent. The flowers remain open during the evening, night, and early morning. In the presence of bright sunlight, they have a tendency to close-up during the middle of the day. Each flower is replaced by an ovoid seed capsule with 6 teeth along its upper rim; each capsule contains several seeds. The flattened seeds are reniform or reniform-orbicular with a fine pebbly surface. The root system consists of a deep white taproot. An older plant may tiller from its base, sending up multiple stems from the same taproot. Starry Campion reproduces by reseeding itself. [图片]Cultivation: The preference is light shade or partial sun, mesic to dry conditions, and soil containing loam, clay-loam, or a little rocky material. When exposed to full sunlight, the leaves become yellowish green and they are less attractive. Sometimes the stems lean sideways when this plant is grown in the fertile soil of flower gardens. Range & Habitat: The native Starry Campion is widely distributed in Illinois, where it occurs occasionally in most counties (see Distribution Map). There are two varieties of Starry Campion that can be found throughout the state, Silene stellata stellata and Silene stellata scabrella. The typical variety of this species is hairless (or nearly so), while var. scabrella is quite pubescent, as indicated above. Habitats include upland rocky woodlands, wooded slopes, savannas, shaded banks of rivers, meadows near wooded areas, and cemetery prairies. This conservative species is usually found in higher quality natural areas. Fire and other kinds of disturbance are beneficial if they reduce dense shade from Acer saccharum (Sugar Maple) and invasive shrubs. [图片]Faunal Associations: The flowers are pollinated primarily by moths and, to a lesser extent, by bumblebees. These insects suck nectar from the flowers. The caterpillars of a rare Noctuid moth, Hadena ectypa (Campion Coronet), feed primarily on the flowers and developing seed capsules of Starry Campion. This moth also sucks nectar from the flowers of this plant (Nelson, 2012). The caterpillars of a closely related moth, Hadena capsularis (Capsule Moth), feed on the flowers and developing seed capules of several species in the Pink family, including Silene spp. The caterpillars of this latter moth may also feed on Starry Campion. Another insect, Aphis sambuci (Elder Aphid), uses Silene spp. as summer hosts and feeds on the sap of their roots. Among vertebrate animals, White-tailed Deer occasionally chomp off the tops of Starry Campion (personal observation), even though its foliage, like other Silene spp., probably contains some saponins and alkaloids that are known to be at least mildly toxic. [图片]Photographic Location: The wildflower garden at the apartment complex of the webmaster in Urbana, Illinois. The plants in the photographs are the pubescent variety of Starry Campion, or Silene stellata scabrella. Comments: The flowers of Starry Campion are quite beautiful. It should be grown more often in flower gardens. This species is easy to identity because of its deeply fringed petals and whorled leaves. Other white-flowered Silene spp. (campions) lack deeply fringed petals and their leaves always occur in opposite pairs. While the flowers of Starry Campion are perfect (bisexual), the flowers of some campions are dioecious (individual plants have either all male flowers or all female flowers, but not both). An example of a dioecious species in this genus is the introduced Silene pratensis (Evening Campion).
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Miss Chen
2018年05月23日
Miss Chen
Description: This herbaceous perennial plant is up to 8" tall and unbranched, except at the base. Both fertile and infertile shoots occur; they form low mats of vegetation across the ground, although fertile shoots with flowers are taller. The succulent stems are terete, light green or pink, and glabrous or finely short-pubescent. The lower leaves of fertile shoots and all leaves of infertile shoots are up to ¾" long and ½" across. These leaves are light green, obovate to nearly orbicular in shape, smooth along their margins, and glabrous; they are whorled in groups of 3 along the stems. The upper leaves of fertile shoots are up to ½" long and ¼" across. These latter leaves are light green, rhombic-elliptic in shape, smooth along their margins, and glabrous; they are either alternate or whorled in groups of 3 along the stems. Both types of leaves are fleshy. The stems of fertile shoots terminate in cymes of flowers. Each flat-topped cyme has about 3 (less often 4) widely spreading branches of flowers; these branches are white to light green, terete, and finely short-pubescent. There are usually 10-25 flowers per cyme; these flowers are sessile, or nearly so. At the base of each flower, there is a leafy bract that resembles the upper leaves of fertile shoots, except it is smaller in size. Each flower is about ½" across or a little more, consisting of 4 narrow white petals, 4 light green sepals, 8 stamens, and 4 erect to ascending white pistils (or carpels) in the center. The anthers of the stamens have a silvery appearance while they are immature, but they later become red or purple. The blooming period occurs from late spring to early summer, lasting about 1 month for a colony of plants. The flowers are slightly fragrant. Afterwards, each flower is replaced by 4 divergent follicles containing the seeds. These follicles are narrowly lanceoloid in shape and 4-5 mm. (a little less than ¼") in length. About 6-12 tiny seeds (individually about 1.0 mm. long & 0.5 mm. across) are contained in each follicle. At maturity, each follicle splits open along one side, releasing the seeds; they are small enough to be carried aloft by the wind. The root system is fibrous. When the sprawling stems establish contact with moist ground, they can form the rootlets of clonal plants at their nodes. Thus, reproduction is by seed or clonal offsets. [图片]Cultivation: The preference is partial sun to light shade, moist to dry-mesic conditions, and a loamy or rocky soil with decaying leaf mould. The foliage is little-bothered by insects and disease. There should be some protection from prevailing winds and hot afternoon sun. This plant is somewhat resistant to drought because of its fleshy leaves and stems, which store water; this drought resistance is enhanced by its Crassula Acid Metabolism (CAM). Range & Habitat: The native Wild Stonecrop occurs occasionally in widely scattered sites in southern, central, and NE Illinois; it is absent from the NW area of the state (see Distribution Map). Habitats include wooded ravines, partially shaded banks along rivers and streams, lightly shaded cliffs, and rocky wooded slopes. This plant is usually found on slopes where there is little ground vegetation. It is normally found in or near woodlands. [图片]Faunal Associations: The flower nectar and pollen of stonecrops (Sedum spp.) attract various kinds of bees, including Andrena forbesii (Krombein et al., 1979). Less often, wasps and flies visit flowers of these plants. Insects that feed on the foliage of Wild Stonecrop (Sedum ternatum) include the Sedum Aphid (Aphis sedi) and the aphid Aphis acrita. The Eastern Chipmunk eats the roots of this plant (Wrazen & Svendsen, 1978). Photographic Location: A partially shaded riverbank in Vermilion County, Illinois, and a rocky wooded slope at the Portland Arch Nature Preserve in west-central Indiana. [图片]Comments: Both the flowers and the foliage are quite attractive; this native species should be grown in flower gardens more often. Wild Stonecrop is the only Sedum sp. that is native to central and northern Illinois; other Sedum spp. that have naturalized in this portion of the state have been introduced from abroad for horticultural purposes. In southern Illinois, there are 2 additional native Sedum spp. that are uncommon. Wild Stonecrop is fairly easy to distinguish from other Sedum spp., whether native or introduced, because it has nearly orbicular leaves in whorls of 3 and flowers with 4 white petals. Other Sedum spp. usually have more narrow leaves that are opposite or alternate, and their flowers often have 5 petals that are white, yellow, or pink. Another common name for Sedum ternatum is Three-leaved Stonecrop.
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Miss Chen
2018年05月23日
Miss Chen
Description: This perennial wildflower is ¾-3' tall and usually unbranched, except near the apex where the inflorescence occurs. Erect leafy stems may be produced individually or in small clusters. The central stem is is whitish green, 4-angled, and covered with either glandular or non-glandular hairs (or both). Pairs of opposite leaves occur along each stem. The leaf blades are 1-4" long and ¾-3" across; they are cordate in shape with coarse dentate-crenate margins. The upper blade surface is medium to dark green and either sparsely covered with short hairs or glabrous. The lower surface is slightly more pale and varies from densely hairy to sparsely hairy (rarely glabrous). The slender petioles are ½-2" long and hairy. The central stem terminates in a raceme of flowers about 3-12" long. In addition, any upper lateral stems may produce smaller racemes of flowers. The racemes are narrow and usually only a few flowers are in bloom at the same time. Individual flowers are ½-1" long. Each flower consists of a blue-violet or purple corolla with 2 lips, a short tubular calyx with 2 lips, 4 inserted stamens, and a pistil with an inserted style. The corolla is much longer than the calyx. The corolla is narrow and tubular at its base, but becomes more wide and swollen towards its lips. The upper lip of the corolla consists of a protective hood, while the lower lip is larger, more rounded, and somewhat lobed. There is usually a large patch of white along the inside of the lower lip that is speckled blue-violet or purple. The calyx is about 1/8" (3 mm.) long, whitish green, and covered with glandular hairs. A protuberance occurs along the upper side of each calyx. The pedicels of theDistribution Map flowers are very short (about 1/8" or 3 mm. in length). Underneath the flowers, there are leafy bracts of variable length: on some plants, they extend as far as the tips of the calyces, but no further, while on other plants they extend beyond the tips of the calyces. These bracts are ovate in shape. The blooming period typically occurs from late spring to mid-summer, lasting about 1 month. However, if a stem is damaged, this may delay flowering until later in the year. Afterward, the flowers are replaced by small dark nutlets. The root system is fibrous and either rhizomatous or stoloniferous. Cultivation: The preference is dappled sunlight to medium shade, mesic conditions, and soil that contains loam, some calcareous sand, or rocky material (typically limestone). This wildflower is a good choice for shade gardens. Range & Habitat: The native Heart-Leaved Skullcap is occasional throughout Illinois. Habitats include upland woodlands that are often rocky, bottomland woodlands, bluffs, woodland openings, shaded areas along cliffs, edges of limestone glades, and thickets. This wildflower is usually found in higher quality woodlands where the original ground flora is still intact. Faunal Associations: The flowers are cross-pollinated by long-tongued bees, particularly bumblebees and Anthophorine bees (Anthophora spp.), which suck nectar and collect pollen. Short-tongued bees and Syrphid flies may also visit the flowers, but they are too small to be effective pollinators. Swallowtail butterflies and other butterflies occasionally visit the flowers, but they are also less effective at cross-pollination according to Robertson (1929). A few species of insects feed on the leaves of Heart-Leaved Skullcap and other skullcaps (Scutellaria spp.). These species include the skeletonizing leaf beetle Phyllobrotica limbata, Asphaera lustrans (Shiny Flea Beetle), larvae of Prochoreutis inflatella (Skullcap Skeletonizer Moth), and larvae of the moth Caloptilia scutellariella. The larvae of this last species are both blotch leaf-miners and leaf-folders. Because of its bitter taste and possible toxicity, mammalian herbivores rarely feed on the foliage. Photographic Location: A floodplain woodland in Lake County, Illinois. The photographed plants are either Scutellaria ovata ovata or Scutellaria ovata bracteata. The photographs (Copyright © 2011) were taken by Paul Showers. [图片]Comments: Unlike many other Scutellaria spp., this skullcap has mostly heart-shaped leaves with indented bases; sometimes the uppermost leaves have bases that are rounded, rather than indented. Across its range, Heart-Leaved Skullcap is highly variable and several subspecies have been recognized. In Illinois, three of these subspecies can be found: Scutellaria ovata ovata, Scutellaria ovata bracteata, and Scutellaria ovata rugosa. The first two subspecies occur throughout Illinois and they are distinguished by the size of the leafy bracts on their racemes: Scutellaria ovata ovata has leafy bracts that extend no farther than the calyces of the flowers, while Scutellaria ovata bracteata has leafy bracts that extend beyond the calyces of the flowers. The third subspecies, Scutellaria ovata rugosa, is only found in southern Illinois. It can be distinguished from the preceding subspecies by its small size (less than 1' tall) and small leaves (less than 1½" long).
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Miss Chen
2018年05月23日
Miss Chen
春末夏初，这段时期我国长江中下游地方连续下雨，空气潮湿，衣物等容易发霉。也叫黄梅天。而最近有很多友友都在询问：花草得了“黄梅病”怎么办？ 其实花草的“黄梅病”来源就是淋雨太多，排水不及时或是排水性差所导致的。 [图片]趁着现在充足的雨水，让花草喝个够，天然雨水浇花不是很好吗？邬志星表示，这恰恰是很多人认识上的一个误区。实际上种花草不是靠淋雨才能长好的，尤其是现在花卉生长旺盛时期，一般下雷雨较大的话，花卉在室外的时间不能超过一天，否则盆中将灌满积水，使花卉根系在水中浸泡时间久了会呼吸不顺畅，导致窒息而死。加上强光照射，积水升温，破坏植物根系，导致叶子发黄，花朵枯萎。 [图片]如何让花草安全度过黄梅天和接下来的高温期？邬志星告诉记者，首先是不能多淋雨，要及时排掉花盆中的积水，把花卉移到阴凉处晾干后，再逐步浇水。如果叶子十分干燥，可用喷雾向叶面喷水，保持湿润；气温超过33摄氏度时，盆花需要遮阴或移到阳光不直晒处较为安全；高温时，需少施肥，一般气温超过35摄氏度，就应停止施肥，因为植物进入了停止生长的“休息期”；还可通过加强修剪，去掉太密的叶子，使空气流通，可减少病菌的传播。
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Miss Chen
2018年05月23日
Miss Chen
贴梗海棠也叫皱皮木瓜，是一种集观赏与药用价值于一体的植物。既可以作为盆栽装饰家庭，又可以用于园林建设；既可以赏花，果实又可以入药，非常实用。 贴梗海棠是一种很高大的落叶灌木，春天花开，红的、粉的、粉白的争相斗艳，花团锦绣，煞是好看。花瓣有两种，一种是重瓣，一种是半重瓣，淡雅娇艳非常好看。作为独特的观赏植物，贴梗海棠多用于园林建设，门房花厅，绿色中一团红色、粉色、粉白色，有诗情画意之感，让人赏心悦目。 [图片]下面要为大家介绍一下日常养殖中贴梗海棠常见的虫害及其防治方法。 危害贴梗海棠的主要虫害有： 1. 萍实巢蛾。主要以幼虫蛀食植物的花和果，9月下旬至10月，幼虫老熟吐丝结薄茧，在浅土层或树皮的裂逢内化蛹越冬。防治方法： ⑴冬季清除破碎的树桩和开裂的树皮，并杀死越冬的幼虫。 ⑵在7月用10厘米长的皱折纸板绕在树上诱杀老熟幼虫。 ⑶幼虫孵化盛期，用杀螟松1000倍液或二氯苯醚菊酯2000倍液喷洒。 [图片]2. 舞毒蛾。主要是幼虫的危害，初孵幼虫一般群集在叶片的背面，夜间吃食叶片，严重时可将全株的叶片吃光；2龄幼虫白天在树皮缝隙、树杈、树下杂草以及石块下潜伏。防治方法： ⑴在羽化盛期的晚上，用黑光灯诱杀成虫。 ⑵幼虫大量发生时，用菊酯类杀虫剂或50%辛硫磷乳油1500倍液，或2.5%臭氰菊酯乳油3000倍液喷洒。 ⑶在树干的基部涂70厘米宽的90%敌百虫原药100倍的药环，触杀幼虫。 ⑷摘除卵块并烧毁。
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