苜蓿品种(系)对苜蓿斑蚜存活率和生殖力的影响

Abstract

Abstract:

Effects of four alfalfa varieties on survival rate and fecundity of Therioaphis maculata (Buckton) were investigated at 25℃ in the laboratory. The results showed that the survival rates of the aphid in the 3-leaf，6-leaf and adult stages were the lowest in HA-3 (8.00％±1.15％, 21.27％±7.40％, and 17.07％±3.03％, respectively), and the highest in Hu (25.63％±3.68％, 42.27％±2.76％, and 55.10％±0.19％, respectively). The survival rate was lower in seedling stage than in adult stage. The level of alfalfa resistance was in order of HA-3>G3>JH>Hu using the innate capacity of increase (rm) and the nymph survival rate as the indices of alfalfa antibiosis to the aphid，and this is correspondent well with that in fields.

Key words: Alfalfa, Therioaphis maculat, resistance, survival rate, fecundity

WANG Sen-Shan, XU Yong-Xia, CAO Zhi-Zhong, SHI Shan-Li, HE Chen-Gui. Effects of alfalfa varieties on the survival rate and fecundity of Therioaphis maculata (Buckton) (Hemiptera: Aphidae)[J].Acta Entomologica Sinica, 2008, 51(7): 774-777.

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Effects of alfalfa varieties on the survival rate and fecundity of Therioaphis maculata (Buckton) (Hemiptera: Aphidae)

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