Li Wenjing, Gao Yu, Hu Yinglu, Chen Juhong, Zhang Jinping, Shi Shusen
College of Plant Protection, Jilin Agricultural University, Changchun 130118, China.
MARA-CABI Joint Laboratory for Bio-safety, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
Insects. 2021 Mar 17;12(3):255. doi: 10.3390/insects12030255.
The bean bug, , is a major pest of soybeans. In order to assess the critical stages of soybean damage by , we tested the damage to soybeans at different growth stages (R, R, and R) caused by five densities of (1, 2, 3, 4, and 5) through a field cage experiment. The results show that the R stage was the most sensitive stage in terms of suffering injury damage, followed by the R stage and then the R stage. The number of stay green leaves was 7.04 per plant, the abortive pod rate of the soybeans was 56.36%, and the abortive seed rate of the soybeans was 46.69%. The dry weight of the soybeans was 14.20 g at the R stage; these values of R were significantly higher than at the R and R stages. However, the dry weight of soybean seed was 4.27 g and the nutrient transfer rate was 27.01% in the R stage; these values were significantly lower than in the R and R stages. The number of stay green leaves, abortive pod rates, and abortive seed rates were all increased significantly with increasing pest density at each stage of soybean growth. However, the nutrient transfer rate was significantly decreased with the increase in the pest density. Soybean nutrition factors changed after they suffered injury; the lipid content of the soybean seed decreased and the lipid content of the soybean plant increased compared to controls, when tested with a density of five in the R stage. These results will be beneficial to the future management of in soybean fields.
豆蝽是大豆的主要害虫。为了评估豆蝽对大豆造成损害的关键阶段，我们通过田间网笼试验，测试了五种密度（1、2、3、4和5）的豆蝽对不同生长阶段（R1、R2和R3）大豆的损害情况。结果表明，就遭受豆蝽伤害而言，R1阶段是最敏感的阶段，其次是R2阶段，然后是R3阶段。每株保持绿色的叶片数为7.04片，大豆的败育荚率为56.36%，大豆的败育种子率为46.69%。在R1阶段大豆的干重为14.20克；R1阶段的这些值显著高于R2和R3阶段。然而，在R1阶段大豆种子的干重为4.27克，养分转移率为27.01%；这些值显著低于R2和R3阶段。在大豆生长的每个阶段，保持绿色的叶片数、败育荚率和败育种子率均随着害虫密度的增加而显著增加。然而，养分转移率随着害虫密度的增加而显著降低。大豆受到豆蝽伤害后营养因子发生变化；在R1阶段用五种豆蝽密度进行测试时，与对照相比，大豆种子的脂质含量降低，而大豆植株的脂质含量增加。这些结果将有助于未来大豆田豆蝽的防治。
