Note the use of pesticides

Bt is a bacterial insecticide , Bacillus thuringiensis class belonging , a variant of a good effect on the prevention and treatment of Lepidoptera larvae in use should pay attention to the following questions:

1 First, pay attention to the quality of Bt , general requirements per milliliter ( or 1 g ) containing more than 10 billion spores , applied concentration is 500 to 700 times , if the product is to increase the concentration of low bacterial content . When you open the bottle test if there is odor indicates may have expired.

(2) application of Bt Never with fungicides such as carbendazim, thiophanate other mix. Fungicide flower sprayer spray should be sprayed clean or fungicides will kill some Bt bacteria , thus affecting the insecticidal effect .

3 applied to the attention of the weather , the best on cloudy or weak illumination medication, if intense sunlight , ultraviolet light will kill bacteria Bt . Sunny days spraying, usually in the morning or afternoon before 10 , preferably in the foggy morning spraying. Temperatures generally in the 10 ~ 35 ℃ is appropriate, if food intake is too low will affect insect control effect is poor.

4 When the insect population density , in order to eradicate pests as soon as possible , add a small amount of pyrethroid pesticides such as speed kill small , Xing Bao cotton , kung fu , etc. , usually in the liquid sprayer can add 1 to 2 ml .