Abstract:

【Objective】 The resistance to soybean aphid (Aphis glycines Matsmura) was found in four cultivars P189, P203, P574, and P746. 【Method】 Those resources were identified again in field test, choice test and no-choice test. 【Result】 The grade of resistance to aphids and damage index of P189, P203 and P746 was significantly different from those of susceptible cultivars (P=0.05). P574 and P746 possessed antibiotic resistance, prevented aphids from reproduction on the plants. P203 possessed antixenosis resistance, prevented aphids from reproduction in field test and choice test, but susceptible in no-choice test. 【Conclusion】 Population development of aphids on plants is significantly different in field test, choice test and no-choice test, which is caused by different selective pressure.

Key words: Aphis glycines matsmura, resistance to aphids, antibiosis, antixenosis