Study on production and application of bio-insecticides for controlling vegetable insect pests
2002
Tran Quang Tan | Hoang Thi Viet | Pham Anh Tuan | Luong Thanh Cu | Nguyen Thi Hoai Bac
Biological insectisides including NPV, B-Bt, Bt, fungi M and B, etc have been studied, produced and put into use. For production of NPV, 12 batches of Heli corverpa armigera, 10 batches of Spodoptera litura with number of 76,600 have been reared. Insecticidal effectiveness of this product was in range of 71.90-73.91 percent to Plutella xylostella three days after spray (DAS) and 69.54-74.30 percent to S.litura 7 DAS. Integrated application of bio-insecticides and chemicals has reduced by 5 spraying labors and significant increasing economic effectiveness.
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