摘要
在室内以不同生测方法测定了噻嗪酮对褐飞虱若虫的毒力,结果表明:噻嗪酮对褐飞虱若虫的活性主要是触杀作用;噻嗪酮也具有一定的内吸作用,但难以由叶片渗透转移到叶鞘部位起杀虫作用。在田间试验中,噻嗪酮对褐飞虱和白背飞虱的防治效果明显高于叶蝉散和甲胺磷,以每亩2.5～5克有效成份的剂量在褐飞虱大发生代前一代的若虫中期施用,既有效控制了当代飞虱,又压低了大发生代飞虱的数量。在田间试验中,噻嗪酮对稻田蜘蛛的数量影响很小。
In laboratory experiments,several bioassay methods were used to evaluate the activities of buprofezin against brown planthopper(BPH,Nilaparvata lugens)nymphs.Results showed that the contact effect is the major mode of action of buprofezin.Although it also possesses systemic action,this has no practical impo tince in field control.Buprofezin showed no effects on the nymphs confined to the rice leaf sheathes when only the leaves were treated with buprofezin.In field exper.ments,buprofezin showed much higher efficacy in controlling both the BPH and the whitebacked planthopper(WBPH,Sogatella furcifera)than the conventional insecticides MIPC and methamidaphos.The number of planthoppers was suppressed to a very low level within a long period of more than 1 month after treatment by 37.5-75g(AI)/ha.of buprofezin,Field experiments also indicated that buprofezin had little detrimental effects on spicers which are important natural enemies of planthoppers.
出处
《华南农业大学学报》
CAS
CSCD
1989年第4期13-18,共6页
Journal of South China Agricultural University
关键词
水稻
褐稻虱
噻嗪酮
作用方式
Buprofezin
Chitin synthesis inhibitor
Rice planthoppers
Mode of action
