4个苜蓿品种对豌豆蚜的抗性评价

Evaluation on resistance of 4alfalfa(Medicago sativa) cultivars to pea aphid(Acyrthosiphon pisum)

在大田和室内条件下,采用大量蚜虫侵染幼苗法评价4个苜蓿(Medicago sativa)品种对豌豆蚜(Acyrthosi-phon pisum)的抗性,以筛选出对豌豆蚜高抗的材料。结果表明,甘农5号(HA-3)在大田和室内的抗性植株百分率均显著高于其他品种,分别为50.3%和48.9%,而猎人河的抗性植株百分率在大田和室内均较低,分别为4.0%和4.3%;4个苜蓿品种在大田的抗性级别为甘农5号高抗,甘农3号、金皇后、猎人河均为感虫,室内抗性级别为甘农5号抗虫,金皇后、甘农3号低抗,猎人河感虫。

The resistance of 4 alfalfa （Medicago sativa） cultivars to pea aphid （Acyrthosiphon pisum ） was evaluated by mass-infesting young seedlings in the field and lab to select high resistant cultivars to pea aphid. The results of this study showed that the Gannong No. 5（HA-3）showed the strongest resistance and its percent of resistant plants accounted for 50. 3% and 48. 9% in the field and lab experiments, respectively. The Hunter River showed a poor resistance and its percent of resistant plant was only 4.0% and 4.3% in the field and lab experiments, respectively. The field experimental results showed that Gannong No. 5 was high resistance cultivar, and Gannong No. 3, Golden Empress and Hunter River were susceptible cultivars; the lab experimental results showed that Gannong No. 5 was high resistance cultivar, and Gannong No. 3 and Golden Empress were low resistance cultivars, and Hunter River was susceptible cultivar.