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在田间抗蚜性鉴定的基础上,在室内25℃条件下,选用4个抗蚜性不同的苜蓿品种(系),测定了不同苜蓿品种(系)上苜蓿斑蚜Therioaphis maculata(Buckton)若虫存活率及生殖力的影响。结果表明:苜蓿斑蚜在不同苜蓿品种(系)3、6叶期及成株期的存活率均以HA-3上最低,分别为8.00%±1.15%,21.27%±7.40%,17.07%±3.03%;Hu上最高,分别为25.63%±3.68%,42.27%±2.76%,55.10%±0.19%;且苗期显著低于成株期。以若虫存活率和内禀增长率作为测定抗生性的指标,供试品种(系)对苜蓿斑蚜抗生性的大小依次为HA-3>G3>JH>Hu,与田间抗性鉴定结果基本相近。
Based on the identification of the resistance to aphids in the field, four different alfalfa varieties (lines) were selected at indoor temperature of 25 ℃, and the survival of the nymphs of Therioaphis maculata (Buckton) on different alfalfa cultivars Effect of rate and fertility. The results showed that the survival rates of Aphis gossypii were the lowest at the 3rd and 6th and the 4th adult stages of alfalfa (8.00% ± 1.15%, 21.27% ± 7.40% and 17.07% ± 3.03%, respectively. The highest in Hu was 25.63% ± 3.68%, 42.27% ± 2.76% and 55.10% ± 0.19%, respectively. The seedling stage was significantly lower than that of adult stage. The nymphal survival rate and intrinsic rate of increase of nymphs were used as indicators of antibiotic resistance. The results showed that the resistance of tested cultivars (lines) to A. mercuricata was HA-3> G3> JH> Hu, which was similar to that of field resistance .