二化螟危害水稻产量损失研究
Loss of rice crops caused by the stemborer,Chilo suppressalis
赫思聪 1周淑香 1李丽娟 1高月波 1毛刚 2刘剑 2孙康娜 3李光雪 3鲁新1
作者信息
- 1. 吉林省农业科学院植物保护研究所,公主岭 136100
- 2. 吉林省农业科学院植物保护研究所,公主岭 136100;吉农高新技术公司生防分公司,公主岭 136100
- 3. 吉农高新技术公司生防分公司,公主岭 136100
- 折叠
摘要
[目的]研究2代区第1代二化螟Chilo suppressalis为害对水稻产量的影响.[方法]通过人工接种二化螟黑头卵模拟2代区第1代二化螟为害对水稻产量损失的影响.[结果]2代区第1代二化螟幼虫危害造成水稻枯鞘、枯心和枯死株,致使单位面积有效穗数减少,产量降低.随着接卵量增加水稻被害株率增加,产量损失率增加,接卵量与产量损失率的关系符合方程y=0.039x-2.793.根据害虫经济阈值的定义,推算出1代二化螟卵量防治指标为111块/667m2,通过分析越冬代性比和雌蛾产卵量数据,提出二化螟成虫防治指标为灯诱累积20.2头或性诱累积8.3头.[结论]明确了 1代二化螟卵量和成虫的防治指标,对二化螟的早期防治有重要指导意义.
Abstract
[Aim]To determine the loss inflicted on rice crops by the first generation of Chilo suppressalis in two regions.[Methods]The relationship between the occurrence of the first generation of C.suppressalis and crop loss was studied by artificially inoculating rice plants with C.suppressalis egg-masses.[Results]First generation larvae in a second-generation area caused withered sheaths,withered hearts and plant death.As a result,the number of effective panicles per unit area of rice was reduced and yield decreased.The loss rate increased with the number of eggs;the correlation between crop loss and the number of egg-masses per 667 m2 can be described by the equation:y=0.039x-2.793.According to the definition of an economic threshold,the control index for the first generation of C.suppressalis is 111 egg-masses per 667 m2.By analyzing the sex ratio and oviposition of the overwintering generation,we propose that the control index for adults be set at 20.2 for light trapping,or 8.3 adults for sex-pheromone trapping.[Conclusion]These results provide important information for the early control of C.suppressalis in rice crops.
关键词
二化螟/产量损失/水稻/经济阈值Key words
Chilo suppressalis/yield loss/rice/ecomomic threshold引用本文复制引用
基金项目
吉林省科技发展计划重点项目(20180201036NY)
出版年
2024
NETL
NSTL
万方数据