摘要
为明确不同浓度噻虫嗪对点蜂缘蝽(Riptortus pedestris)当代、子代种群在大豆上为害能力的影响,本试验以噻虫嗪处理点蜂缘蝽成虫、若虫,构建受噻虫嗪不同浓度胁迫后的当代、子代实验种群,在大豆盛荚期(R4)通过盆栽网罩接虫方式,接入不同浓度噻虫嗪处理点蜂缘蝽当代、子代种群,研究其为害对大豆植株产量的影响。结果表明:同世代同虫态中,各处理种群的为害能力随着噻虫嗪浓度的增加而减弱。在LC50浓度处理下,当代成虫和若虫处理的大豆产量分别为对照处理的1.97倍和1.78倍,子代分别为1.71倍和1.44倍。当代成虫和若虫在对照(LC0)处理下的为害能力分别为LC50浓度处理的2.62倍和3.12倍,子代分别为1.68倍和1.61倍。相同浓度处理,当代为害后的大豆产量均大于子代危害后的产量,当代若虫为害大豆后产量最高,子代成虫为害大豆后产量最低,表明经噻虫嗪处理的点蜂缘蝽子代对大豆产量仍有一定的不利影响,但在逐渐降低。子代的为害能力较当代处理均有所升高,当代、子代处理的为害能力表现出随着浓度的升高为害能力下降的趋势。成虫当代为害能力回归模型为y=63.460-0.484x,成虫子代为害能力回归模型为y=65.048-0.327x,若虫当代为害能力回归模型为y=48.211-1.422x+0.0167x2,若虫子代为害能力回归模型为y=55.068-0.884x+0.00888x2。不同浓度噻虫嗪处理的点蜂缘蝽造成一定程度的大豆产量损失。同浓度处理,点蜂缘蝽子代的为害能力大于当代,当代、子代种群的为害能力随着浓度的升高而下降。成虫的为害能力大于若虫且随浓度的增加为害能力下降。试验结果可为合理科学减量使用噻虫嗪田间防治点蜂缘蝽提供依据。
To investigate the effects of different concentrations of thiamethoxam on the infestation ability of the parental and first filial generation populations of R.pedestris on soybean,the adults and nymphs of R.pedestris were treated with thiamethoxam to establish experimental parental and first filial generations under different concentrations of thiamethoxam.At the full pod stage of soybean(R4),we used the potted soybean with netting and then inoculated the parental and first filial generation populations of R.pedestris treated with different concentrations of thiamethoxam,and studied the effect of their damage on soybean plant yield.The results showed that in the same generation and insect stage,the infestation ability of each treatment population decreased with increasing thiamethoxam concentration.Under the LC50 concentration treatment,the soybean yield of the parental adult and nymph treatments was 1.97 and 1.78 times higher than that of the control treatment,and the yield of the first filial generation was 1.71 and 1.44 times higher,respectively.The infestation ability of parental adults and nymphs in the control(LC0)treatment was 2.62 and 3.12 times higher,respectively,than that in the LC50 concentration treatment.Similarly,the first filial generation was 1.68 and 1.61 times higher than that of the LC50 treatment,respectively.In the same concentration treatment,soybean yield after parental infestation was greater than that after infestation by the first filial generation.Soybean yield after parental nymph infestation was the highest,while soybean yield after the first filial generation adult infestation was the lowest.This indicates that the first filial generation of R.pedestris treated with thiamethoxam still has some adverse effect on soybean yield,but this effect gradually decreases.The infestation ability of the first filial generation was higher than that of the parental treatment,and the infestation ability of both the parental and first filial generation treatments showed a decreasing trend with increasing concentration.The regression model of infestation ability was as follows:adult-parental generation generation:y=63.460-0.484x;adult-first filial generation generation:y=65.048-0.327x;nymph-parental generation generation:y=48.211-1.422x+0.0167x2;nymph-first filial generation generation:y=55.068-0.884x+0.00888x2.Different concentrations of thiamethoxam-treated soybeans resulted in some yield loss.Under the same concentration treatment,the infestation ability of the first filial generation was greater than that of the parents and the infestation ability of both the parental and first filial generatio decreased with increasing concentration.The infestation ability of the adults was greater than that of the nymphs and decreased with increasing concentration.The test results provide a basis for a rational and scientific reduction in the use of thiamethoxam in the field for the control of R.pedestris.
作者
丁宁
王自杰
曲昕
王龙
史树森
高宇
DING Ning;WANG Zi-jie;QU Xin;WANG Long;SHI Shu-sen;GAO Yu(College of Plant Protection,Jilin Agricultural University/Key Laboratory of Soybean Disease and Disease Control,Ministry of Agriculture and Rural Affairs,Changchun 130118,China;Jiamusi Branch of Heilongjiang Academy of Agricultural Sciences,Jiamusi 154007,China)
出处
《中国油料作物学报》
北大核心
2025年第1期211-216,共6页
Chinese Journal of Oil Crop Sciences
基金
财政部和农业农村部:国家现代农业产业技术体系(CARS-04)
黑龙江省重点研发计划(GA22B014)
吉林农业大学国家级大学生创新创业训练计划项目(202210193017)。
关键词
点蜂缘蝽
噻虫嗪
大豆
为害能力
回归模型
Riptortus pedestris
thiamethoxam
soybean
infestation ability
regression model
