Aliyu H, Ishiyaku M F
Department of Biological Sciences, Ahmadu Bello University, Zaria, Nigeria.
Department of Plant Sciences, Ahmadu Bello University, Zaria, Nigeria.
Pak J Biol Sci. 2013 Aug 1;16(15):743-6. doi: 10.3923/pjbs.2013.743.746.
The development of cowpea aphid larvae was monitored on seven cowpea genotypes (IAR-48, TVu-15866, IT84S-2246-4, SAKA BABBA SATA, IT90K-76, KANANNADO and TVX 3236). The aim of the study was to determine the developmental response of the larvae as an indication of antibiotic resistance of the genotypes. Highly significant differences (p < 0.01) were observed with respect to fertility, larval development, adult longevity, life span, multiplication rate and intrinsic rate of increase. KANANNADO and TVX 3236 show minimum antibiotic effects while a landrace SAKA BABBA SATA shows relatively high antibiotic effects. This result further reveals the potential of SAKA BABBA SATA as a resistance source to aphid. The reaction of IT84S-2246-4, a hitherto aphid resistant genotype, which supported higher levels of survival of the larvae relative to other known susceptible genotype IAR-48, may be an indication of the presence of a new biotype of Aphis craccivora endemic to Zaria environs, or that of the ability of insects to overcome hindrances to their survival including various forms of resistance.
在七种豇豆基因型（IAR - 48、TVu - 15866、IT84S - 2246 - 4、SAKA BABBA SATA、IT90K - 76、KANANNADO和TVX 3236）上监测豇豆蚜幼虫的发育情况。该研究的目的是确定幼虫的发育反应，以此作为基因型抗生性的指标。在生育力、幼虫发育、成虫寿命、寿命、繁殖率和内禀增长率方面观察到极显著差异（p < 0.01）。KANANNADO和TVX 3236显示出最小的抗生效应，而一个地方品种SAKA BABBA SATA显示出相对较高的抗生效应。这一结果进一步揭示了SAKA BABBA SATA作为蚜虫抗性来源的潜力。IT84S - 2246 - 4是一种迄今抗蚜虫的基因型，相对于其他已知的感虫基因型IAR - 48，它能支持更高水平的幼虫存活，这可能表明扎里亚周边地区存在一种新的豆蚜生物型，或者表明昆虫有能力克服包括各种抗性形式在内的生存障碍。
