Aphids are the main pests on fruit trees, and their prevention and treatment are not timely or improper use of pesticides often cause leaves and fruit to fall off, seriously affecting yield and tree vigor. The population of locusts is huge, with small individuals, strong reproduction and adaptability. It can carry out parthenogenetic reproduction. It can breed for 4 to 5 days, and it can breed for tens of generations a year. Aphids mainly accumulate on new leaves, young leaves, and calyxes. They pierce the plant tissue with a sucking mouthpart to extract sap, causing macular or dark spots on affected parts. The affected leaves shrink, the buds atrophy or deformity, and the plants die in severe cases. . Aphids can secrete honey dew, inducing bacterial growth and inducing soot. Therefore, a single method is difficult to achieve control effects, the best method is to adapt to local conditions, seize the best period of the spring for comprehensive prevention. I. Plant control 1. Tobacco: 1 kg of dry tobacco soaked in 10 kg of hot water, rub it out, remove, add 10 kg of water to soak for a day and night, rub and filter. The two filtrates were mixed and sprayed uniformly with 10 kg of an aqueous solution containing 0.5 kg of lime. 2. Orange peel, chili: 1 kilogram of dried orange peel and 0.5 kilogram of dried chili, smashed after mixing, boiled with 10 kilograms of clean water, soaked for 24 hours, and the filtered leachate can be sprayed. The solution has a contact killing effect, and the aphid soon dies after receiving the drug. 3. Ramie leaves: soaked in fresh water twice with nettle leaves, boiled for 15 minutes and then filtered. Second, physical control 1. Yellow plate inducement: Use yellow taper to yellow the fiber board, wood board or cardboard, coat with oil such as No. 10 engine oil or Vaseline to kill winged aphids. Note that the yellow plate should be replaced in time. 2. Silver gray avoidance: silver gray has a strong repellent to the aphids, silver gray plastic strips can be hung in the park or covered with a silver gray film to avoid aphids. The law has a good control effect on the locusts to move the virus. 3. Locust pheromone inducement: Inject aphid pheromone (400 microliters) into a small brown plastic bottle with a 1 mm diameter hole, hang the bottle in the garden, and place the basin under it. , so that the induced locusts fell into the water and died. Third, agricultural control Timely clearance of the garden, the orchard after picking timely treatment of dead branches, leaves, weeds, pruning to remove the old leaves, diseased leaves, yellow leaves, and brought out of the park concentrated burned, killing field weeds in winter or early spring spraying herbicides. , Kill the eggs of the ascarid that weed over the weeds and reduce the source of insects. For larger fruit trees, select a smooth 15 cm wide belt at the base of the trunk 20 to 30 cm above the ground, scrape the rough skin of the tree trunk, and wrap in a circle of cotton or old newspapers soaked with 40% dimethoate 5 to 10 times liquid. , And then on the outside plastic film. After one week, remove the plastic film and remove the cotton and old newspapers. Fourth, biological control The natural enemies of locusts include more than 80 species such as ladybugs, grasshoppers, scorpions, spiders, florets, maggots, and scorpions. They can be introduced, propagated, or released. In the main breeding season of natural enemies, attention should be paid to coordination and prevention, reducing the number of medications, and selecting low-toxicity pesticides. V. Chemical Control 1. Spray 2000-3000 times of cypermethrin, or 2.5% to 1500 times of 2.5% rattan extract, spray once every 7-10 days, 2 or 3 times to remove weeds and eliminate overwintering eggs. . 2. After the new leaf grows out, it is found that there are already roundworms on the new leaf, and the whole tree is protected against worms and insecticides before leaf rolling. If curling is found, it should be sprayed again after 7 days. 3. Select high-efficiency, low-toxicity, low-residue pharmaceuticals, and alternately use multiple pesticide rotations to delay the development of aphid resistance, such as 10% imidacloprid WP 2000 times; 70% Amirene Dispersion Granules 3000 Times of liquid; 1.8% avermectin (afford, insect killing star) 3000 times; 20% good year of winter (Goodwill) EC 2000 ~ 3000 times; 2.5% Kung Fu EC 1000 ~ 1500 times solution. Use 400 ~ 500 times liquid detergent spray kill aphids also better.
Hebei Abiding Co.Ltd, a professional food supplier, was established in 2005 in Shijiazhuang, China. We specialize ourselves in supplying Organic Tomato Paste and Organic Pasta. Conventional ones are also available to supply. We can make the private labels according to the customers' requirement. Our products have EU, NOP and JAS organic certificates. They are also Kosher certified. We have business relationships with importers and wholesalers from around the world, mainly in Europe and America. Over the years, we have earned highly recognition from clients due to our qualified service and steadily increase our market share year after year.
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