How do you control Helicoverpa armigera?
Although the cotton bollworm Helicoverpa armigera has traditionally been controlled by application of chemical pesticides, chemical control selects for resistance, pollutes the environment, and endangers human health.
What is the damaging stage of Helicoverpa armigera?
H. armigera caused more injuries in the middle part of the plant, followed by the upper and lower third. The rate of seed-yield loss at the R2 growth stage was 7.7 g per larva, significantly lower than the rate of loss at the R5. 1 stage (10.6 g per larva).
Which insect order does Helicoverpa armigera belong?
LepidopteraCotton bollworm / OrderLepidoptera is an order of insects that includes butterflies and moths. About 180,000 species of the Lepidoptera are described, in 126 families and 46 superfamilies, 10 percent of the total described species of living organisms. It is one of the most widespread and widely recognizable insect orders in the world. Wikipedia
What is the economic importance of Helicoverpa armigera?
Economic importance: The damage caused by H. armigera is annually estimated, world-wide, to exceed US$2 billion, and the bollworm is listed as an A2 quarantine pest by EPPO. In the Middle East it is a major pest of cotton, tomatoes and other solanaceous crops, legumes like peas and beans, and maize (corn).
Which of the following is a predator of eggs of Helicoverpa armigera?
Ants
Ants as egg predators of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in Australian cotton crops.
Is used as acaricide in crops?
Acaricides are pesticides used to kill ticks and mites. Acaricides include chlorinated hydrocarbons (e.g., dichlorodiphenyltrichloroethane; DDT), organophosphorous compounds (e.g., Diazinon), carbamates (e.g., carbaryl), pyrethroids (e.g., permethrin, flumethrin), formamidines, and avermectins.
How do Americans control bollworms?
Use 5% neem seed kernel extract (NSKE) from 45th day of crop stage. Profenophos 50 EC @ 2.0 ml/ l OR thiodicarb 75 WP @ 1.0 g/l OR methomyl 40 SP @ 0.6 g/l can be used as ovicidal spray. Pyrethroids can be sprayed at 100 days after sowing of the crop.
What is the scientific name of leaf eating caterpillar?
Leaf eating caterpillar : Spodoptera litura F. They eat the green matter of the leaf and turn to grey or dark grey or black in colour. The grown up larva feed voraciously on the tobacco leaf making lot of holes on the leaf causing damage to an extent of 10 to 15%.
What class of insecticide is indoxacarb?
oxadiazines
Pesticide Type: Insecticide Chemical Family: oxadiazines U.S. Producer: E. I. du Pont de Nemours and Company (DuPont), Wilmington, DE.
Is there insecticide resistance in Helicoverpa armigera?
Current status of insecticide resistance in Helicoverpa armigera after 15 years of Bt cotton planting in China. Journal of Economic Entomology. 106 (1), 375-381.
What is the gene-flow between populations of Helicoverpa armigera?
Gene-flow between populations of cotton bollworm Helicoverpa armigera (Lepidoptera: Noctuidae) is highly variable between years. Bulletin of Entomological Research. 95 (4), 381-392.
How many eggs does a Helicoverpa armigera lay?
This weed plays a fundamental role in the survival and development of the Helicoverpa armigera. It is a species that has a high reproductive potential. Only one female is capable of laying between 1000-1500 eggs, reaching a quantity of 150 eggs per day..
Is H armigera a quarantine pest?
H. armigera is listed as an A2 quarantine pest by EPPO (OEPP/ EPPO, 1981 ). Although it is certainly a serious outdoor pest in Mediterranean countries, it has probably reached the limits of its natural distribution in the EPPO region. Quarantine status arises from the risk of introduction into glasshouse crops in northern Europe.