Banu M Rizwana, Muthiah A R, Ashok S
Department of Plant Breeding and Genetics, Tamil Nadu Agricultural University, Agricultural Research Station, Bhavani Sagar-638 451, India.
Pak J Biol Sci. 2007 Apr 1;10(7):1149-50. doi: 10.3923/pjbs.2007.1149.1150.
Hence an experiment was conducted to screen fifteen germplasm lines for their resistance/tolerance to podborer under natural infestation in pesticide-free open field. To asses the degree of infestation 250 green pods were randomly picked up from all the plants of each plot. The pods damaged by gram podborer were detected by the presence large bored holes in pods. Such infested and healthy pods were counted separately. The pod damage (%) was calculated on the basis of number of pods examined and the number of infested pods. Marketable green pod yield of each genotype under natural pest infestation was also recorded. On the basis of mean infestation, ICP13201 showed the lowest (25%) pod damage and showed lowest susceptibility among the genotypes studied. It was followed by ICP13208 and ICP11964 showed lower pod damage. The rest of the genotype suffered higher pod damage to Helicoverpa armigera. Considering the yield potential ICP13201, ICP13214 and ICP13212 showed higher yield potential than other genotypes. Considering the lower susceptibility to Helicoverpa armigera and higher yield potential ICP13201 was found to be the best.
因此，在无农药的露天田间自然侵染条件下，进行了一项实验，以筛选15个种质系对豆荚螟的抗性/耐受性。为了评估侵染程度，从每个小区的所有植株中随机挑选250个绿色豆荚。通过豆荚上大的蛀孔来检测被豆荚螟破坏的豆荚。分别统计此类受侵染和健康的豆荚数量。根据检查的豆荚数量和受侵染豆荚的数量计算豆荚损害率（%）。还记录了自然虫害侵染下每个基因型的可销售绿色豆荚产量。基于平均侵染情况，ICP13201的豆荚损害率最低（25%），在所研究的基因型中表现出最低的易感性。其次是ICP13208，ICP11964的豆荚损害较低。其余基因型对棉铃虫的豆荚损害较高。考虑到产量潜力，ICP13201、ICP13214和ICP13212的产量潜力高于其他基因型。综合对棉铃虫较低的易感性和较高的产量潜力，发现ICP13201是最佳的。
