ACTA AGRICULTURAE BOREALI-SINICA ›› 1999, Vol. 14 ›› Issue (2): 67-72. doi: 10.3321/j.issn:1000-7091.1999.02.014

Special Issue: Cotton

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Studies on the Enhancement of Bacillus thuringiensis Efficacy Against Heliothis armigera (Lep.:Noctuidae)

Yin Xinming, Guo Xianru, Jia Xincheng, Wu Yunhan, Qou Liyou   

  1. College of Biological Engineering, Henan Agricultural University, Zhengzhou 450002
  • Published:1999-06-28

Abstract: The potency of endotoxin preparation of Bt.(Cs3ab-1997) was increased through the addition of either alkaline compounds naturally occurring in the insect midgut, general proteolytic activators or midly toxic compounds of inorganic and organic nature along with endotoxin in the diet. The results showed that the potency of endotoxin preparation of Bt. was increased by 0.95, 1.22, 0.37, 0.45, 1.17, 2.10 and 9.0 times, respectively, after the addition of calcium carbonate, ZnSO4, magnesium chloride, apple acid, Maleic acid, C2H4O2 and HSCH2COONa, of which ZnSO4, C2H4O2 and HSCH2COONa were more effective at the tested concentrations.

Key words: Bt, Endotoxin potency, Synergist

Cite this article

Yin Xinming, Guo Xianru, Jia Xincheng, Wu Yunhan, Qou Liyou. Studies on the Enhancement of Bacillus thuringiensis Efficacy Against Heliothis armigera (Lep.:Noctuidae)[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1999, 14(2): 67-72. doi: 10.3321/j.issn:1000-7091.1999.02.014.

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