防治灰飞虱高效活性化合物和杀虫单剂及复配剂研究

采用浸苗法测定了2种新型烟碱类活性化合物和4种杀虫单剂对灰飞虱3龄若虫的毒力,并对其中3种杀虫单剂的复配增效作用进行了研究.结果表明,在供试的6种化合物中,活性化合物SXSN001对灰飞虱的毒力最高,其他化合物按毒力由高到低依次为:噻虫嗪>SXS001>吡虫啉>毒死蜱>吡蚜酮.将毒死蜱分别与吡蚜酮和噻虫嗪按一定比例复配后发现二者均表现出明显的增效作用,其中毒死蜱与吡蚜酮配比为9:20时,增效作用最明显,其校正毒力比为1.28,共毒系数为238.77;毒死蜱与噻虫嗪配比为16:1时,增效作用最明显,其校正毒力比为1.74,共毒系数为201.12.

The Study of New Effective Compounds and Mixtures to Control the Small Brown Planthopper(Laodelphax striatellus)

The toxicity of 6 insecticides including 2 new neonieotinoid and 4 commercialized compounds to the 3rd showed that the toxicity in descending turn was SXSN001,thiamethoxam,SXSS001,imidacloprid,chlorpyrifos and py-metrozine.The combined synergism of chlorpyrifos with pymetrozine or thiamethoxam was also tested with the same method,which indicated that the two mixtures had remarkable synergistic effect in mix proportion of 9:20 or 16:1,respectively.When chlorpyrifos mixed with pymetrozine,the common-toxicity coefficient(CTC)and the corrected toxicity ratio(CTR)were 238.77and 1.28 respectively,while 201.12 and 1.74 respectively when chlorpynfos with thiamethoxam.