Antibiosis and non preference for the oviposition of Bemisia tabaci (Genn.) biotype B (Hemiptera: Aleyrodidae) in common bean genotypes

The common bean Phaseolus vulgaris L. constitutes an important source of protein and income for many countries, including Brazil. Different factors contribute with the reduction in production, including pest insects, especially Bemisia tabaci (Genn.) biotype B. This study aimed to identify common bean genotypes resistant to B. tabaci biotype B and the types of resistance involved. Therefore, two experiments were developed in a greenhouse and laboratory, evaluating 11 common bean genotypes. To test the free-choice experimental design, the randomized block design was adopted, and the completely randomized one was selected for the no-choice tests and antibiosis, with six replications for each test. The following variables were evaluated: incubation period of eggs; nymphal; egg to adult; viability of egg to adult and adult longevity. The IAC-Harmony prolonged the nymphal and egg to adult periods of B. tabaci biotype B. The genotypes were also tested by the whitefly oviposition in free and no choice tests.

普通菜豆（Phaseolus vulgaris L.）是包括巴西在内的诸多国家重要的蛋白质来源与经济作物。诸多因素会导致其产量下滑，其中害虫为害尤为突出，尤以烟粉虱（Bemisia tabaci (Genn.)）B生物型为甚。本研究旨在鉴定对烟粉虱B生物型具有抗性的普通菜豆基因型，并明确其所涉及的抗性类型。为此，研究人员分别在温室与实验室中开展了两组试验，共评估11份普通菜豆基因型。针对自由选择试验，采用随机区组设计（randomized block design）；非选择试验与抗生性（antibiosis）试验则采用完全随机设计（completely randomized design），两类试验均设置6次重复。本次试验测定的指标包括：卵孵化期、若虫发育历期、卵至成虫的发育历期、卵至成虫存活率以及成虫寿命。试验结果显示，基因型IAC-Harmony可延长烟粉虱B生物型的若虫发育历期与卵至成虫发育历期。此外，研究还通过自由选择与非选择试验中的烟粉虱产卵情况，对各菜豆基因型的抗性进行了评价。