摘要
草地螟Loxostege sticticalis是内蒙古地区重大迁飞性害虫,极大地威胁大豆、向日葵的生产。为明确草地螟虫口密度与大豆、向日葵产量损失关系,确定防治指标,在内蒙古中西部地区,采用田间接虫的方法,研究了草地螟虫口密度与大豆、向日葵产量损失之间的关系和防治指标。结果表明,大豆产量损失率(y)与草地螟虫口密度(x)显著相关,回归模型为y=0.1135 x^(2)-1.7607 x-1.8182。向日葵产量损失率(y)与草地螟虫口密度(x)显著相关,回归模型为y=0.0052 x^(2)-0.2207 x-2.0798。按照防治指标的直接收益与成本,确定了该地区大豆田草地螟的防治指标为26.68头/株,向日葵田草地螟的防治指标为56.39头/株。研究结果对该地区大豆、向日葵田草地螟科学、精准防控具有重要指导价值,对化学农药减量、提高防治经济效益以及保护生态环境具有重要意义。
Loxostege sticticalis is one of the most destructive agricultural pests in Inner Mongolia,posing a great threat to soybean and sunflower production.To quantify yield losses and determine economic thresholds for soybean and sunflower caused by L.sticticalis,artificial field plot infestation experiments were carried out in the central and western regions of Inner Mongolia.The results showed that the soybean yield loss rate(y)was significantly correlated with insect density(x),following the regression model:y=0.1135 x^(2)-1.7607 x-1.8182.Sunflower yield loss rate(y)was also significantly correlated with insect density(x),with the regression model:y=0.0052 x^(2)-0.2207 x-2.0798.According to the direct benefits and control costs,the economic threshold for controlling L.sticticalis was determined as:26.68 larvae per plant for soybean and 56.39 for sunflower.These results provide scientific guidance for accurate effective management of L.sticticalis in soybean and sunflower fields in the central and western regions of Inner Mongolia.Furthermore,these findings contribute to reducing chemical pesticide use,improving the economic benefits of control,and protecting the ecological environment.
作者
曹梦宇
仇凯
赵素梅
李国强
高健
于凤玲
薛晓阳
曹宇
张静航
赵晓军
高翔
薛智平
黄俊霞
CAO Mengyu;QIU Kai;ZHAO Sumei;LI Guoqiang;GAO Jian;YU Fengling;XUE Xiaoyang;CAO Yu;ZHANG Jinghang;ZHAO Xiaojun;GAO Xiang;XUE Zhiping;HUANG Junxia(Plant Protection and Quarantine Center of Inner Mongolia Autonomous Region,Hohhot 010010,China;Agriculture and Animal Husbandry Bureau of Hexigten Banner,Chifeng 025350,China;Baotou Agricultural and Animal Husbandry Sciences Research Academy,Baotou 014010,China)
出处
《植物保护》
北大核心
2025年第3期69-73,共5页
Plant Protection
基金
国家重点研发计划(2022YFD1400605)。
关键词
草地螟
大豆
向日葵
产量损失
防治指标
Loxostege sticticalis
soybean
sunflower
yield loss
economic threshold
