Question

Efficient approach to screen and multiply a b. Thuringiensis subsp. Kurstaki d1-23, strain exhibiting high toxicity against spodoptera exigua, while retaining its high toxicity against h. Armigera. Their results proved that the toxicity of b. Thuringiensis subsp. Kurstaki against s. Exigua and h. Armigera could be enhanced by a high amount of zwittermicin a accumulated in culture broth. The toxicity of d1-23 against s. Exigua and h. Armigera was improved by 115.4 and 25.9 per cent, respectively, compared to its parental commercial strain bmb005.

Answer 1

Efficient approach to screen and multiply a b. Thuringiensis subsp. Kurstaki d1-23, strain exhibiting high toxicity against spodoptera exigua, while retaining its high toxicity against h. Armigera. Their results proved that the toxicity of b. Thuringiensis subsp. Kurstaki against s. Exigua and h. Armigera could be enhanced by a high amount of zwittermicin a accumulated in culture broth

Answer 2

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Isolated efficient B. thuringiensis strains were further used for toxicity analysis against second instar larvae of H. armigera.