武汉地区梨木虱生物学特性及其种群动态变化研究

近年来，梨木虱在湖北省各梨产区大面积发生，危害梨树芽、叶片、嫩梢和果实，严重影响了梨树的产量及果品质量。本文报道了梨木虱危害症状、梨木虱卵、幼虫、成虫的形态特征，系统研究了武汉地区梨木虱成虫种群和幼虫种群动态变化。结果表明：梨木虱在武汉地区1年发生5代，越冬代羽化高峰期为3月29日，第一代梨木虱羽化高峰期为5月7日，第二代梨木虱羽化高峰在5月28日，第三代梨木虱羽化高峰期为7月9日，第四代梨木虱羽化高峰期为9月4日，第五代梨木虱羽化高峰期为10月19日；第1代、第2代和第3代幼虫危害梨树叶片，而第4代和第5代不危害梨树叶片，而是取食梨园中的幼嫩的杂草。本研究为梨木虱的测报技术和综合防治技术提供了理论依据。

Study on Biological Characteristic and Population Dynamics of Psylla Chinensis

In recent years, Psylla Chinensis happened large areas in pear production area of Hubei province. The Psylla Chinensis harmed the buds, leaves tender tip and fruit of pear, and seriously effected the pear production and quality of the fruits. The harmed symptom of Psylla Chinensis, feature of eggs, larva and adult of Psylla Chinensis, were described in this paper. Growth and decline trend of adult and larva population of Psylla Chinensis were system researched. The results showed there were five generations of Psylla Chinensi a year in Wuhan. The adults peak time of overwintering generation appear in 29 March, The eclosion peak time of first generation was 7 May, the second generation eclosion peak time was 28 May, the third generation eclosion peak time was 9 July, the forth generation eclosion peak time was 4 september, and the fifth generation eclosion peak time was 19 October. The first, second and third generation harmed the leaves of pear, and the forth and the fifth generation did not harm the leaves of pear, and they fed the tender weeds in the fields. This study provided theory evidence for observe and predict and integrated control technique of Psylla Chinensis.