摘要
1979—1984年省棉虫协作攻关小组,在鄂北岗地、江汉平原、鄂东丘陵棉区,进行了药剂防治红铃虫最佳棉铃生育指标田间试验,经Finlay和Tai法分析,红铃虫最喜选择小于25天的青铃上产卵。但由于该铃期适应性窄,着卵铃率及卵量并不高,分别占有卵铃的18.84％,总卵量的18.82％;而25—30天青铃,对红铃虫产卵习性有广泛的适应性,且始终稳定,其着卵铃率及卵量最高,分别占52.17％和50.19％,是受害的关键铃期。在红铃虫二、三代产卵始盛期,以单株4个30天青铃作为化防指标参数,直观、简便可行。
In 1979—1984,field experiments were carried out in northern ridgeregion,Jianghan plain,and eastern hilly area,in Hubei Province todetermine the optimum developmental stage of cotton boll for insecti-cide spraying against pink bollworm Pectinophora gossypiella.In accord-ance with the results of Finlay's and Tai's analyses,the femalesprefered to oviposit on the bolls less than 25 days old,however,the egg loaded boll rate (18.84% of total egg loaded bolls) and egg number(18.82% of total egg number) in this stage were not too high,due tothe narrow adaptability to pink bollworm.While the 25—30 days oldbolls,which possessed broad adaptability and good stability to pinkbollworm oviposition and had the highest egg loaded boll rate(52.17%)and egg number (50.19%),was the day attack stage of this insect.Thus,the 4 thirty days old bolls/plant in the beginning peak stage ofoviposition of the second and third generation pink bollworm wasstipulated as the developmental threshold for chemical control,and itwas simple,easy,and feasible.
出处
《植物保护学报》
CAS
CSCD
北大核心
1990年第3期219-222,共4页
Journal of Plant Protection
关键词
红铃虫
棉铃
生育指标
药剂
防治
Pectinophora gossypiella——developmental threshold of cotton boll
