Botanical pesticides are a large class of pesticides in biological pesticides. It mainly refers to pesticides whose active ingredients are derived from plant organisms and is the pesticide of choice for the production of pollution-free agricultural products.
The celangulin is extracted from the root bark and seeds of the wild shrub plant of the genus Euonymus, and the preparation is 1% celangulin emulsifiable concentrate. The drug has strong stomach toxicity, antifeedant, repellent, and contact killing effects, and has good control effect on the cruciferous vegetable cabbage caterpillar. Use a dose of 667 square meters 1% emulsifiable oil 50-70 ml, usually add water 60-75 kg diluted, evenly spray. The pesticide has good quick-acting effect, and the control effect can reach more than 90% one day after the drug, and the effect period is more than 7 days, which is safe for crops.
Osthole osthole is an active ingredient extracted from the dried and mature fruit skunk of the umbelliferous plant snake bed. The preparation is 0.4% osthole emulsifiable concentrate. It is mainly based on contact toxicity, supplemented by stomach toxicity, and has good control effect on cruciferous vegetable cabbage caterpillar and tea tree tea. The dosage of the cabbage flower of the cruciferous vegetable is 0.4% EC 667 square meters 80-120 ml; the tea tree tea ruler dosage is 0.4% emulsifiable concentrate 100-120 ml. Generally, every 667 square meters is diluted with 50-75 kilograms of liquid, and evenly sprayed for about 7 days, which is safe for crops.
It is the main component of eucalyptus oil, and the preparation is 5% eucalyptus solution, which has good control effect on cruciferous vegetable aphids. Use a dose of 5% solution 667 square meters 70-100 ml, 75 kg of water, even spray, effective period of about 7 days, for crop safety.
The blood root alkaloid is one of the main active ingredients in the extract of the Papaveraceae plant, and the preparation is one of the main active ingredients in the total alkaloids. The preparation is 1% blood root alkali wettable powder. Wet powder). The medicine has certain control effect on the cruciferous vegetable cabbage caterpillar, the cardamom, the apple jaundice, the two-spotted spider mites, and the pear tree hibiscus. China Pesticide Network recommends that the control of cruciferous vegetables, cabbage caterpillars and kidney bean aphids, should be used at a dose of 1% wettable powder of 667 square meters 30-50 grams, with the best control effect of cabbage caterpillars in the lower larval stage; prevention and control of apple tree aphids and Two-spotted spider mites and pear-tree hibiscus are treated with 1% wettable powder, and the dilution ratio is 1500-2500 times. Generally, it is best to spray evenly in the young nymphal stage of spider mites and pear hibiscus. The drug has a quick-acting effect. Generally, the control effect is obviously increased after 3 days, and the effect period is about 7 days, which is safe for crops.
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