Usage and dosage of Bacillus thuringiensis

Bacillus thuringiensis can be sprayed and spread in two ways. The spray is applied from the early stage of pest occurrence or the peak incubation period of eggs, generally 600-800 ml per mu when used on vegetables, beans and sweet potatoes. Sowing is mainly used to control corn borer, and it is used in trumpet period. Generally, 2000 units/mg granules are used per mu, and 300-400g granules are used.

Bacillus thuringiensis Usage:

1. Cruciferae vegetable cabbage worm, diamondback moth

Before the third instar of larvae, 100 - 300 g of 8000IU/mg wettable powder, or 100 - 150 g of 16000IU/mg wettable powder, or 50-80 g of 32000IU/mg wettable powder, or 2000IU/microliter suspension, or 100 - 150 ml of 4000 IU/microliter suspension, or 50 - 75 ml of 8000IU/microliter suspension is used per 667 square meters. Or 10 billion live spores/g wettable powder ioo~iso g, mixed with water 30~45 d-g evenly sprayed.

2. Rice leaf roller, rice bract

From the peak of larva hatching to before the third instar, 8000IU/mg WP 300~400 g, or 16000IU/mg WP 150r-J 200 g, or 32000IU/mg WP 80~100 g, or 2000IU/microliter suspension 400~500 ml, or 4000IU/microliter suspension 200~250 ml per 667 square meters Or 8000IU/microliter suspension 100-120 ml, mixed with water 30~45 kg evenly sprayed.

3. Cotton bollworm, bridge-making insect

400 - 500 g of 8000IU/mg WP, or 200 - 250 g of 16000 g WP, or 120 g of 32000IU/mg WP, or 400 - 500 ml of 2000IU/microliter suspension, or 100-120 ml of 8000 IU/microliter suspension, per 667 square meters from the peak of larva hatching to before drilling, or 10 billion live spores/g wettable powder 250 - 400g, mixed with water 45- 75kg evenly sprayed.

4, corn, sorghum corn borer

250-300 g of wettable powder 8000IU/mg or 150-200 ml of suspension 4000IU/microliter is used per 667 square meters to spray or mix fine sand with corn or sorghum at the big bell opening stage to prepare toxic soil for filling heart leaves.

5. Soybean moth, sweet potato moth

At the peak of larva incubation, 8000IU/mg WP 200 - 300 g, or 16000iu/mg WP 100 - 150 g, or 32000iu/mg WP 50 - 80 g, or 2000iu/microliter suspension 200-300 ml, or 4000 IU/microliter suspension 100 - 150 ml, or 8000 IU/microliter suspension 50-75 ml, Add 30~45 kg of water and spray evenly.

6. Tobacco budworm

spray before that third instar of larvae, 400-500 g of 8000IU/mg WP, or 200 - 250 g of 16000IU/mg WP, or 100 - 120 g of 32000IU/mg WP, or 400 - 500 ml of 2000 IU/microliter suspension, or 100 - 120 ml of 8000 IU/microliter suspension, Add 30~45 kg of water and spray evenly.

7. Tea caterpillar

spray from that peak of larva hatching to before the third instar, use 8000IU/mg wettable powder 100 - 150 times solution, or 16000iu/mg wettable powder 200 - 300 time solution, or 32000iu/mg wettable powder 400-500 times solution, or 2000IU/microliter suspension 80 - 100 times solution, or 4000IU/microliter suspension 150-200 times solution, or 8000IU/microliter suspension 300 - 400 times solution, Or 10 billion live spores/g wettable powder 200 times solution evenly sprayed.

The jujube geometrid larvae started spraying before the third instar, and the spraying times were the same as those of "tea caterpillar". Citrus Papilionidae larvae hatching peak period began spraying, spraying multiple with "tea caterpillar" apple nest moth, pear tree sky caterpillar

Larvae hatching peak period began spraying, spraying multiple with "tea caterpillar". Forest geometrid, lymantrid, pine caterpillar, American white moth from the beginning of pest occurrence spraying, spraying multiple with "tea caterpillar".

In addition, Xiaobian suggested that Bacillus thuringiensis should not be mixed with systemic organophosphorus insecticides or fungicides and Bordeaux mixture. The poison to silkworm is very strong, and the silkworm rearing area should keep a certain distance from the pesticide application area.