As the temperature gradually rises, the landscaping plants enter a vigorous growing season, and the locusts begin to move a lot, seriously affecting the growth of green plants.
Locusts are commonly known as budworms, honey worms, mites, etc., and they tend to focus on flower buds, young shoots, and leaves that damage the young shoots and young leaves. When it occurs, the density is large. In addition to sucking the internal juice of the plant body to cause nutrient loss, it can also cause the leaves to curl and secrete honeydew, causing coal pollution and spreading viral diseases.
Aphids vary in size and body color due to their different types, but the difference is not significant. The same type of aphids are often divided into two types, wingless and winged. Common types are cotton aphid, peach aphid, long-term rose, cypress, and diver.
Long-term stagnation of the rose: Algebra varies in different regions. At a temperature of about 20 °C, combined with drought and little rain, it is conducive to its occurrence and reproduction. The hazard began in March, and the density of insect population increased sharply in mid-April. It occurred severely from May to June and from September to October. It is not conducive to the occurrence and damage of aphids in the midsummer.
Myzus persicae: When the conditions of Hunchun are suitable, the overwintering eggs begin to hatch as dry mothers, which are harmful to the cluster buds. After spreading leaves, they migrate to the back and shoots of the leaves and cause damage. In the first half of May, the breeding is the fastest, the most harmful, the peach aphid has a strong tendency to yellow, and has a negative tendency to silver gray.
Cotton aphid: Overwintering eggs on wintering hosts such as pepper, hibiscus and pomegranate. After the germination of the wintering host in the spring of the next year, the overwintering eggs hatched as dry mothers. After 2-3 generations of parthenogenesis, the winged females were born, and they moved into the cotton fields from April to May, killing the newly unearthed cotton seedlings and then breeding in the cotton fields. It will enter the peak period from May to June, and the amount of sputum will decrease after the end of June, but the damage period will be prolonged in the dry year. A winged sex mother is born in mid-to-late October and moved back to the wintering host, which is unfavorable in rainy years or rainy seasons.
Willow black donkey: live on the willow tree throughout the year, with eggs on the willow branches overwintering. During the period from March to April every year, the overwintering eggs hatch and begin to harm. They occur greatly from May to June, and the damage is serious. In the late May to early June, the spread of winged parthenogenetic females can be produced, and the production will occur in late October. After the squatting, the eggs are overwintered.
Polymorphism: The eggs are overwintered near the buds of young trees, bark scars, and cracks. In the early spring, when the buds are cracked, the female females are harmful to the young branches and the back of the leaves, causing the leaves to be rolled, which is the main damage period throughout the year. From late April to early June, a large number of winged mites occurred, and in mid-May, a large number of diapause sputum occurred, which was scattered on the leaf margin of the leaf back. In September-October, the diapause type begins to develop, and in October, the male and female are mating and giving birth.
Hangzhou New Chest: This worm attracts new leaves. After being killed, it bulges around the worm body, gradually embedding the worms to form insects. The worms continue to grow, which can reach the size of soybeans, the largest close to the size of broad beans, 5-6 In the month, the insects turn red and rupture, and the winged migratory locusts move to the second host.
Bamboo stem stalk: mainly to harm the Cixiao bamboo, the phoenix bamboo, etc., a large number of worms are covered on the branches, because it will secrete sugary excrement after sucking, so coal smut will occur in the harm And it emits a strong smell. When it is serious, the bamboo will die, and it will affect its viewing effect. The insects have been produced for many generations a year. During the 2-4 months of the next year, the bamboo shoots began to move and migrated to the shoots of bamboo shoots, reaching a peak in mid-May. When the new bamboo shoots came out in July, they migrated to the new bamboo shoots, and reached a peak period in September.
Bai Dawei: Over the winter eggs hatching and breeding from the end of March to the beginning of April. It is an important pest on parks, green spaces, nurseries and garden cypress trees. The worms use the sputum and the scorpion to collect the surface of the young stems, and the color of the damaged branches becomes light, and the growth is poor. In severe cases, the branches are withered. It can secrete a large amount of honeydew covered with cypress scales and twigs and drop under the trend, which induces cypress pollution.
Pear bifurcation: The egg is overwintered in the gap between the bud and the fruit table and the branch, and begins to hatch when the pear bud sprouts. If the scorpion clusters on the green buds, the buds will be drilled into the buds when the buds are opened, and the leaf-leafing period will be concentrated on the tender shoots, causing the leaves to roll up vertically into a cylindrical shape. After the falling flowers, a large number of rolled leaves appeared, and winged crickets began to appear in about half a month. In May and June, a large number of them moved to the summer sage and thatch. In the middle and late June, the pear trees were basically extinct. During the autumn of September-October, a large number of winged scorpions were relocated to the pear trees on the summering hosts to breed and lay eggs for wintering.
Comprehensive prevention:
1. When the number is not too large, remove the damaged leaves, concentrate on the treatment, and eliminate the mites.
2. Protect and use natural enemies. There are many kinds of natural enemies of mites, such as: seven-spotted ladybugs and scorpion flies.
3. Use yellow or black light to trap aphids.
4, chemical control can be sprayed in time 50% yam pine oil 1000-1500 times liquid, 50% phoxim emulsifiable oil 2000 times liquid, 80% dichlorvos emulsifiable oil 1000 times liquid, "Qi Lin tree worm once net" 800-1000 times liquid "Qi Lin quit" 500-800 times liquid, "Qi Lin catching net" 600-800 times liquid. Note that Rosaceae plants such as peach trees use organophosphate insecticides carefully during flowering to prevent phytotoxicity.
More pesticide knowledge, please pay attention to China Pesticide Network
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