Boiça Júnior Arlindo Leal, Costa Eduardo Neves, de Souza Bruno Henrique Sardinha, Forim Moacir Rossi, Perlatti Bruno, da Cruz Mara Cristina Pessôa
Faculdade de Ciências Agrárias e Veterinárias, Campus de Jaboticabal, Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista, 14884-900, Jaboticabal, SP, Brazil.
Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, 79804-970, Dourados, MS, Brazil.
Bull Entomol Res. 2022 Dec;112(6):818-826. doi: 10.1017/S0007485322000220. Epub 2022 May 5.
is an important pest of several crops in South America, including soybeans. Adults cause severe defoliation in soybean plants, and damage is significant when cotyledons are attacked. This study evaluated feeding non-preference to adults using 10 soybean genotypes, testing (i) 15-day-old whole plants and (ii) leaf disks of 60-day-old plants, through assessments of soybean attractiveness and leaf area consumed (LAC). Foliar contents of flavonoids and nutrients, and leaf trichome density were quantified for potential correlations with soybean resistance to adult of . In the whole young-plant experiment, under free-choice conditions, the lowest LAC was observed in IAC 100 and PI 227687. In no-choice, PI 227687 and IGRA RA 626 RR showed lower LAC than the other genotypes. In the leaf disk test, in free-choice, the genotypes IAC 100, PI 274454, PI 227687, DM 339, and BR 16 were the least preferred by adult of . In no-choice, PI 274454 was one of the least preferred, similarly to IGRA RA 626 RR, Dowling, and PI 227687. In the whole plant experiment, a high rutin content and low amounts of zinc, calcium, sulfur and manganese were associated with less consumption of on leaves of resistant genotypes. In contrast, in the leaf disk test there was a significant influence of trichomes in soybean resistance to the pest. In conclusion, the PI lines herein assessed are also promising sources for developing cultivars resistant to .
是南美洲几种作物（包括大豆）的重要害虫。成虫会导致大豆植株严重落叶，当子叶受到攻击时，损害尤为显著。本研究使用10种大豆基因型评估了成虫的取食非偏好性，通过评估大豆的吸引力和叶片消耗面积（LAC），测试了（i）15日龄的整株植物和（ii）60日龄植物的叶盘。对黄酮类化合物和营养物质的叶片含量以及叶毛密度进行了量化，以寻找与大豆对该成虫抗性的潜在相关性。在整株幼苗实验中，在自由选择条件下，IAC 100和PI 227687的LAC最低。在无选择条件下，PI 227687和IGRA RA 626 RR的LAC低于其他基因型。在叶盘试验中，在自由选择条件下，IAC 100、PI 274454、PI 227687、DM 339和BR 16是该成虫最不喜欢的基因型。在无选择条件下，PI 274454是最不喜欢的基因型之一，与IGRA RA 626 RR、Dowling和PI 227687相似。在整株植物实验中，抗性基因型叶片上芦丁含量高以及锌、钙、硫和锰含量低与该害虫的取食量减少有关。相反，在叶盘试验中，叶毛对大豆对该害虫的抗性有显著影响。总之，本文评估的PI品系也是培育抗该害虫品种的有前景的资源。
