Variable Levels of Resistance of Soybean Genotypes on the Performance of Euschistus heros (Hemiptera: Pentatomidae)

Abstract

The Neotropical brown stink bug Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) is one of the major soybean pests in South America. This species is responsible for high levels of infestation, causes critical damage to seeds, it is associated with leaf retention on plants, and it is extremely difficult to manage. Host plant resistance is a notable technique to assist in reducing the stink bug population in soybean crops. The antibiosis resistance of soybean genotypes to E. heros was evaluated in laboratory. Genotypes L1-1-01, 'IAC 100', 'IAC 23', and 'Coodetec 208' increased the length of nymphal developmental time. PI 274453 and PI 227687 reduced egg viability and also adult body weight. PI 274454, 'IAC 19', PI 227687, and PI 229358 led to low nymphal viability. These results suggest that these genotypes may be useful in soybean breeding programs that focus on the development of genotypes resistant to E. heros.

Research Article Line selection and correlation between traits of soybean genotypes under high naturally occurring stink bug infestation

“…The genotypes Msoy 8527, G1, G2, and G24 have indicated higher resistance to the attack of stink bugs by withstanding or recovering from damage caused by insect and probably exhibiting antixenosis resistance (usually expressed as non-preference of the insect) to E. heros, which can be a valuable characteristic for soybean breeding programs that aim to develop cultivars resistant to this species (Souza et al, 2017). Also, the genotypes G1 and G2 have demonstrated great tolerance concerning stink bug damage to seeds associated with a high grain yield standard, which reveals a great potential source of genetic resistance to stink bugs.…”

“…Stink bugs represent a hazard to many crops, especially to soybeans as they can considerably impact the productivity of the crop by the occurrence of stunted plants, empty pods, and foliar retention, which can compromise total grain yield and seed quality (Guedes et al, 2012). Among the soybean stink bug complex, the species Euschistus heros, known as the brown stink bug, is one of the most damaging pests (Souza et al, 2017) as it is generally associated with the highest population density among other species of stink bugs; therefore, it has a greater potential to cause injuries to soybeans (Kuss et al, 2012).…”