Antibiosis and antixenosis resistance to oviposition by Bemisia tabaci (Gennadius) B biotype (Hemiptera: Aleyrodidae) in soybean genotypes

ABSTRACT: This study was aimed at assessing some biological parameters of Bemisia tabaci B biotype at immature stages to examine antibiosis in six soybean genotypes, besides antixenosis resistance to oviposition in choice and non-choice tests, under greenhouse and laboratory conditions. Between April 2016 and August 2016, bioassays were carried out at the Laboratory of Applied Entomology at College of Agricultural Sciences at Federal University of Grande Dourados (UFGD) Dourados (MS), Brazil. The following variables were evaluated: egg incubation period, nymphal and egg-to-adult duration, egg and nymph viability, and egg-to-adult survival on the soybean genotypes 68i70 RSF IPRO, M6210 IPRO, MS 947 IPRO, BMX Potência RR, M6410 IPRO, and ANTA 82 RR. Antixenosis resistance to oviposition by the silverleaf whitefly was found for MS 947 IPRO, while oviposition was highest for ANTA 82 RR, M6210 IPRO, and M6410 IPRO. The genotype MS 947 IPRO adversely affected egg and nymph viability, and egg-to-adult survival rates was the lowest among genotypes (59.75%), suggesting antibiosis resistance to this pest.摘要：本研究旨在温室与实验室条件下，通过选择试验与非选择试验探究6个大豆基因型对烟粉虱（Bemisia tabaci）B型的产卵排趋性（antixenosis），同时评估该害虫未成熟期的多项生物学参数，以解析各基因型的抗生性（antibiosis）抗性。2016年4月至8月，本研究于巴西大杜拉多斯联邦大学（UFGD）农业科学学院应用昆虫学实验室开展生物测定试验。本试验评估的指标包括：卵孵化期、若虫发育历期、卵至成虫总发育时长，卵存活率与若虫存活率，以及供试大豆基因型68i70 RSF IPRO、M6210 IPRO、MS 947 IPRO、BMX Potência RR、M6410 IPRO、ANTA 82 RR上的卵至成虫存活率。结果表明，MS 947 IPRO对烟粉虱产卵表现出排趋性抗性，而ANTA 82 RR、M6210 IPRO及M6410 IPRO的产卵量最高。此外，MS 947 IPRO对烟粉虱卵及若虫存活率存在显著不利影响，其卵至成虫存活率为所有供试基因型中最低（59.75%），证实该基因型对该害虫具有抗生性抗性。