Medicinal plant pests Helicoverpa armigera

Scientific name Helicoverpa armigera (Hubner) Synonyms Heliothis armigera Hubner is Lepidoptera, Noctuidae, alias Helicoverpa armigera. Distributed throughout the country.

The host burdock, belladonna, andrographolide, Poria, Salvia, Poria, white lentils and other medicinal plants.

The characteristics of the larvae larvae take the end of the beginning of the end of the unfolding of the young leaves broken, after drilling into the flower buds, flowers, fruit within the food damage, caused by falling flowers, buds. Fruit victims often eat empty fruits. When the pests are infested, they climb onto the plants and feed on the fruit to form holes. When the larvae harmed the larvae, the larvae spun silky petals and tender broodles and hid them to feed. After being harmed by this insect, the yield and quality of various medicinal seeds were impaired. Burdock often cuts production by 30%.

Morphological characteristics, living habits see cotton pests - cotton bollworm.

Control methods (1) In the hatching period of eggs, Bt emulsion is sprayed every 667m2, 200g of HD-1 biological preparation or 600 times of 25% diflubenzuron suspension, and it has certain control effect on cotton bollworm; it can also be produced in cotton bollworm. From the beginning to the end of the egg period, Trichogramma beetle was released, and 15,000 heads were released per 667m2, followed by another 3-5 days and 3-4 times in a row. The parasitism rate of eggs reached 80%. In addition, H. armigera nuclear polyhedrosis virus can also be used. (2) When the number of eggs in a field reaches 20 to 30, it is controlled that when half of the eggs begin to darken, they are sprayed with 50% phoxim EC with 1,000 times or 21% with 1000 times. (3) Before 3rd instar, spray 5% Suppository Emulsion 2000 times or 10% imidacloprid WP 1500 times, 40% octopine high chlorinated chlorin (Cotton NET) 2000 times, 25% chlorinated chlorinated chlorinated oil ( Cotton Farmers) 2000 times solution (Beijing Shunyi County Pesticide Factory), 20% solution of methomyl EC 1500 times, 35% solution of endosulfan 1500 times, 35 isotoflu 2 Emulsion 1000 times, 2.5% cyanogen chloride Lingbao 1500 times liquid, 20% Nonglvbao EC 1500 times, 20% ciprofloxacin 2000 times, and 50% Kaimin No. 2 EC 1000 times are effective against cotton bollworm. Pay attention to alternate rotation medications. The drug was stopped 9 days before harvest.

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