摘要
旨在为乐山稻区稻水象甲的检疫防控提供依据,采用田间调查的方法研究稻水象甲种群动态和危害规律,用线性回归法分析成虫危害程度与幼虫数量之间的相关性。结果表明:稻水象甲在乐山地区1年发生1代,越冬代成虫迁入稻田时期不一致,且其产卵期长,幼虫发育、化蛹和羽化时期极不整齐,各虫态交叉现象明显。稻水象甲越冬成虫主要分布在离稻田10 m范围内的坡地和树荫下0~5 cm浅土中,其中树荫下的越冬虫量最大。开春后平均温度达12℃以上,越冬成虫逐渐复苏并取食周边寄主。调查表明,乐山地区共有5个县(区)发生稻水象甲疫情,涉及乡镇73个,发生面积约8000 hm2。
To provide a basis for quarantine and control of Lissorkoptrus oryzophilus in Leshan rice area, the population dynamics and occurrence regularity were studied by a field investigation, and the correlation between the damage degree of adults and the number of larvae was analyzed by linear regression. The results showed that L. oryzophilus had one generation a year in Leshan. The migration period of overwintering adults to rice field was not consistent, and its spawning period was long. The larva development, pupation and eclosion period were very irregular, and the cross phenomenon of each insect state was obvious. The overwintering adults of L. oryzophilus were mainly distributed in 0-5 cm shallow soil of slopes and shade within 10 m from the rice field, and the amount of overwintering adults under the shade were the largest. In early spring, the average temperature was over 12℃, and the overwintering adults gradually recovered and fed on surrounding host plants. The survey showed that the epidemic regions covered 5 counties, 73 towns in Leshan, and the infested area was more than 8 thousand hm^2.
作者
杨春林
李洪浩
牟成君
杨子威
邓劲梅
Yang Chunlin;Li Honghao;Mu Chengjun;Yang Ziwei;Deng Jingmei(Leshan Plant Protection and Quarantine Station,Leshan Sichuan 614000;The Institute of Plant Protection,Sichuan Academy of Agricultural Sciences,Chengdu Sichuan 610066;Leshan Seed Management Station,Leshan Sichuan 614000;Jingyan Plant Protection and Quarantine Station,Jingyan Sichuan 613100)
出处
《中国农学通报》
2020年第31期92-96,共5页
Chinese Agricultural Science Bulletin
基金
四川省科技计划项目“农作物抗病虫性鉴定技术创新与应用”(2016NYZ0053)
国家现代农业产业技术体系四川创新团队项目“绿色水稻病虫防控体系建立”(川农函〔2019〕472号)
乐山市重点科技计划课题“水稻稻水象甲发生规律及防控方法研究”(12NZD070)。
关键词
乐山稻区
稻水象甲
种群动态
危害规律
Leshan rice area
Lissorkoptrus oryzophilus
population dynamics
occurrence regularity
