The beautiful leaves of jasmine are bitten by insects, and the flowers are full of insect eyes, which makes people feel distressed. This is a common problem of many flower growers. In fact, in the whole growth process of jasmine, there are many kinds of pests, and all kinds of pests have their own niches, such as termites that harm roots, scale insects that harm stems, moth seeds that harm flowers and so on. So, what about the jasmine worm? How to treat them? Uncle gardener collected several common diseases and insect pests of jasmine and their control methods for your reference. Potted jasmine i. Diptera striped leaf borer, a genus of Coccidae, is known to occur in low mountains and plains of Japan in May-June and August-September, causing harm to scattered flowers and fruits of rats. Harmful jasmine, commonly known as jasmine bud moth, was found in China. The masses are called moths. Habit: Overwintering with larvae on jasmine branches and flowers. At the end of February and the beginning of March, the pupa stage is warm, and it emerges in spring. Adults lay eggs on buds or tender leaves. After hatching, the larvae burrow into the flowers and eat them. When there are no flowers, they damage the leaves between leaflets, which can be transferred and damaged. Larvae can also destroy shoots, which occurs for more than ten generations every year. It was observed that the insect infected Jasmine in the whole flowering period, with overlapping generations, and the infection peak was from June to September. Prevention and control methods of Hemiptera and Diptera: This insect mainly harms flowers, and jasmine is the raw material of scented tea, so the safety requirements are particularly high. In the prevention and control, we should first pay attention to not using high toxic and high residue pesticides at flowering stage, avoid using drugs as much as possible at flowering stage, and control the population density through prevention and control before and after flowering stage. Specific method: 1. Sweep the countryside in winter, completely cut off dead branches, residual branches and insect branches, and burn them centrally. Sweep leaves, burn or bury them. Check the fields with many overwintering insects, and reduce the source base of overwintering insects in combination with pesticide application. 2. Pay attention to the flowering inspection, and remove all damaged buds, flowers and branches in time. Smoking in the flower field at dusk can prevent adults from laying eggs. 4. Chemical control. 24.5% chlorfenapyr 2000 times solution or 1.8% chlorfenapyr 2000 times solution, or 800- 1000 times solution of sanle pesticide, or other avermectins, such as 0.9% flufenapyr 2000-3000 times solution and 1% chlorfenapyr 2000 times solution. 2. Jasmine leaf moth Jasmine leaf moth belongs to Lepidoptera, which is a borer moth. Larvae mainly feed on jasmine leaves, sometimes destroying buds and shoots. The newly hatched larvae cluster on the back of leaves and feed on mesophyll, leaving a translucent epidermis. When they grow up, the leaves are eaten into holes or dents. It can also bite the bark of a twig, making the leaves turn yellow and fall off, and the whole twig will die. Habit: It occurs once a year in the south 10 generation and overwinters as larvae. Adults appear in March-April, stay still during the day, move at night, mate and lay eggs. Eggs are mostly laid on leaves, but also on the back and shoots of leaves. Eggs lay eggs in scales, and each female fish can lay 50-200 eggs. Larvae gather and spread for the first time after the third instar, and often tie branches and leaves together to hide and feed on them. This kind of harm is more serious in autumn. Control methods of jasmine leaf borer. Clean the garden in early spring, remove dead leaves, burn and eliminate the source of overwintering insects. 2. Biological control. Including protecting natural enemies, spawning parasitic bees and using biological insecticide Bacillus thuringiensis. 3. Chemical control. When the enemy can't control its harm, 90% trichlorfon 600-800 times dilution, 50% fenpropathrin EC 1000 times dilution, 2.5% deltamethrin 1500-2000 times dilution, 20% fenpropathrin 2000-3000 times dilution or 24. Note that spraying should be carried out after picking flowers, and pyrethroid pesticides can only be picked more than 5 days after application. Spodoptera litura 3. Spodoptera litura belongs to Lepidoptera, Noctuidae, also known as Spodoptera litura and Spodoptera litura. Spodoptera litura is a worldwide pest, mainly distributed in tropical and subtropical regions of Asia, as well as Mediterranean regions of Europe and Africa. It is distributed all over China. This insect is omnivorous and gluttonous.

This insect occurs more frequently in warm areas south of Huaihe River in China, with more populations in the middle and lower reaches of Yangtze River and South China, and occasionally in the north. The occurrence and harm of Spodoptera litura are affected by many factors, such as temperature, humidity, soil, rainfall, host plants, natural enemies and human measures. The optimum growth temperature is 25~30℃, and the optimum relative humidity is 75%~80%. In fields with good water and fertilizer conditions and dense growth, the population density of insects is generally high. 20% soil moisture is beneficial to pupation of larvae and emergence of adults. If the newly hatched larvae are washed away by heavy rain, a large number of them will die, and the water will stay in the field for a long time, which is not conducive to the survival of pupae. The temperature and humidity conditions in Guangxi are most suitable for the growth and development of Spodoptera litura. If there is no continuous rainstorm in June, it will be beneficial to the outbreak of insect population. Control methods of Spodoptera litura. Trapping and killing adults: using the phototaxis and chemotaxis of adults, trapping and killing adults with black light and poplar branches or sweet and sour. 2. Artificial egg killing: According to the characteristics that adults tend to lay eggs on the back of the middle leaves of plants, and larvae feed in groups, eggs should be removed in time before spawning season and larvae spread, so as to kill adults. 3. Chemical control: 10% SC 1500 times for larval stage, 2,500 times for 5% Regent SC, 4,000 times for 5.7% cypermethrin EC, 3,000 times for 4.5% cis-cypermethrin EC, and 52.25% nongdile EC1. 4. Citrus gray elephant Citrus gray elephant belongs to COLEOPTERA, Elephantidae. Harm jasmine from March to May every year. Adults bite buds, buds and leaves and eat old leaves. Young and old leaves were eaten in the shape of carving, and they were all eaten seriously, which greatly affected the first batch of flowers in late April and early May. According to a preliminary investigation, there are more than 20,000 insects per mu in the sandy loam jasmine field along the river in Hengxian County. Gray images of citrus are known to be harmful: citrus, tea, jasmine, etc. Artificial killing and control of citrus gray weevil: this insect has no hind wings, can't fly, moves slowly, has strong feign death, and can be killed after being caught artificially. Chemical control: spraying should be carried out at the peak of adults. The following chemicals can be selected: 30% insecticide 1000 times, 4.5% beta-cypermethrin 1000~2000 times, or 2.5% effort 1000~2000 times, and some dichlorvos spray can be added appropriately. Highly toxic pesticide methamidophos, 1605, etc. They are not suitable for use because of their high toxicity and long residual period. Flower thrips V. Flower thrips Flower thrips belong to the genus Thysanoptera thrips. This insect destroys the corolla and stamens in flowers, especially around the ovary, and destroys the reproductive organs. After the corolla is damaged, horizontal stripes or dotted stripes appear, which can lead to the deformation, wilting and dryness of the corolla, which has a great influence on the ornamental value. After leaves are damaged, silver-gray stripes often appear on young stems and new leaves, or the base of leaves is all silver-gray, which leads to deciduous leaves and affects growth. Life habit: one year 1 1~ 14 generations, with overlapping generations. Overwintering as adults. Adults have strong phototaxis. There are dozens to hundreds of adults and nymphs in a slightly fragrant big corolla flower. Eggs are more common in petals, filaments and young leaves, and the spawning place is slightly swollen or slightly raised, which can be checked by light. Each female lays 77~248 eggs, and the spawning period is 20~50 days. The control method of flower thrips is chemical control. Spraying 500-800 times of 2.5% Derris, 800- 1000 times of 3% pyrethrin, 50% fenvalerate 1000 times, 20% fenvalerate 1000 times and fenvalerate/kloc-0. 6. Cotton red spider Cotton red spider is also called hawthorn spider mite and cotton hawthorn spider mite. It belongs to Eupolyphaga, Tetranychidae and is an important pest mite. Cotton spiders are omnivorous, with strong reproductive ability and rapid diffusion, which can harm dozens of plants, including corn, melons, beans, vegetables, trees and weeds. Jasmine is one of the most common harmful plants. This insect bites and sucks the host juice on the back of jasmine leaves or buds with adult mites, juvenile mites and nymphs, making the damaged leaves green and obviously white.

The optimum temperature is 29~3 1 and the relative humidity is 35%~55%. If the air humidity exceeds 70%, its reproduction will be inhibited. There are many natural enemies of cotton spiders, such as lacewings, carnivorous mites, carnivorous thrips and ladybugs. All these have played a very good role in the prevention and control of cotton spiders. Control methods of cotton spiders. Agricultural control can eliminate the overwintering insect source and reduce the harm by clearing weeds in the field, pruning, removing diseased leaves, defoliating, burning or treating. Strengthen the management of water and fertilizer to enhance the insect resistance of plants. Keep the humidity and worsen the living environment of cotton spiders. 2.24.5% chlorfenapyr or 1.8% chlorfenapyr diluted 2000 times, or 50% tricyclic tin wettable powder 1500 times, or 75% propargite 1000 times, or 35% Cetane EC diluted 3000 times, or 7. Snails Snails belong to mollusks, not insects. Taxonomically speaking, it belongs to Gastropoda, pholiota adiposa and Snails. Commonly known as buffalo, snail, crustacean. Homosnail and gray snail are common in farmland, with homosnail as the main species. Snails have a very complicated diet. Besides jasmine, vegetables, beans, hemp, tobacco, tea, cotton, green manure, bananas, fruit trees and weeds are all harmful. On jasmine, young leaves, old leaves and even branches have been damaged from the bud tips that have just been pulled out to the growing branches. They often eat in groups, eat up the buds of branches or bite off the bark of branches, causing the whole branches to wither, or biting leaves into nicks, perforations and rags, which seriously affects the yield. Oncomelania control methods: agricultural and manual control 1. Clean the countryside regularly, and clean up the fallen leaves on the ground of crops, especially the trimmed branches and leaves, and burn them before winter. This is one of the places where snails can spend the winter. They cannot stay in the garden for the winter. February, April, May, September and October are the spawning seasons for snails. Combined with intertillage weeding, the topsoil at the root of crops is ploughed and exposed to the sun to kill eggs. 3. At the peak of snail activity, in the morning and evening or on cloudy days, a large number of snails come into contact with feed and are caught artificially. Pesticide control: 30% fenoconazole, 0/00 ~ 500 g per mu/kloc, 2~3kg bait can be mixed with water to form small particles. It can be applied in strips or holes, and the control effect is very good. You can also use 300-000g molluscicide per mu, 350g molluscicide with 6% density and 65,438+0,000g molluscicide with 65,438+0,000g molluscicide per mu, mix dry fine soil or fine sand, and spread it evenly on snail-shifting crops and the ground at night, or dissolve it in warm water and spray it with a sprayer. Spray 1000 times diluted 70% balosha wettable powder. If it rains after application, it should be applied again. Or sprinkle lime powder, 3-5 kg per mu. Tips for worms to eat jasmine: don't treat bugs born on jasmine with chemicals. You can make use of some small things in life, first make your own insecticidal water, and then use chemicals when it is not possible. After all, pesticides are toxic and unsafe to use at home. If you want to know how to make your own pesticides, you can pay attention to Uncle Gardener's previous article.