臺灣農藥科學第四期電子書

蘇力菌混合農藥毒效 35 Assessing the Effects of Mixing Bacillus thuringiensis with other Pesticides on the Biological Activities of Plutella xylostella and Spodoptera litura Fei-Ting Hu 1 , Sheueh Kuo 1 , Ching-Chou Tzeng 1* Abstract Hu, F. T., Kuo, S., and Tzeng, C. C. 2018. Assessing the effects of mixing Bacillus thuringiensis with other pesticides on the biological activities of Plutella xylostella and Spodoptera litura . Taiwan Pestic. Sci. 4: 21-36. Current agricultural policy primarily focuses on safety and sustainability. Significant progress has been made in the development of microbial agents, and these agents are in- creasingly employed by farmers. Microbial agents are less dangerous and more specific than chemical pesticides, and furthermore, these agents are harmless to humans, animals, natural enemies of pests, and beneficial organisms. Microbial agents can also be used in conjunction with chemical pesticides to (1) reduce the amount of chemical pesticide that is required to protect agricultural crops and (2) achieve more comprehensive crop manage- ment. The current study focused on developing methods by which B. thuringiensis can be mixed with chemical pesticides. In so doing, our goal was to reduce chemical pesticide use while still ensuring that crops are sufficiently protected. For this, recommended concentra- tions of Bacillus thuringiensis subsp. aizawai ( Bta ) and B. thuringiensis subsp. kurstaki ( Btk ) were used, and microbial agents were mixed with chemical insecticides (applied at the full label recommended concentration or at half or a quarter of this concentration), chemical fungicides, or other common microbial agents. Co-toxicity of mixtures involving Accepted: August 2, 2018. * Corresponding author, E-mail: cctzeng@tactri.gov.tw 1 Taiwan Agricultural Chemicals and Toxic Substances Research Institute, Council of Agriculture, Taichung