沂蒙山区东方金龟子发生危害特点及防治

The occurrence characteristics of Maladera orientalis and its control in the Yimeng Mountainons Area

1999～ 2 0 0 2年 ,对沂蒙山区东方金龟子发生危害特点及其防治进行了调查研究。东方金龟子 1年发生 1代 ,以成虫在土壤 40～ 5 0cm深处越冬。 3月下旬至 4月上旬成虫开始出土 ,4月中下旬气温达1 7 2℃～ 2 4 5℃时为出土盛期。成虫每日的活动危害期集中在接近日落到日落后 1h ,群集于树上啃食嫩芽、幼叶和花朵。成虫具假死性和趋光性。并提出了有效综合防治对策。

This paper describes the occurrence characteristics and control of Maladera orientalis(Motschulsky) in 1999～2002 in the Yimeng Mountains Area. The field study show that M.orientalis has one generation a year and over winters in soil at a depth of 40～50 cm. In the final ten day of March to early-April, the overwintering adult begins to emerge from near sunset to an hour after sunset. The climax of emergence is in mid to late-April (the temperatures is in 17.2～24.5℃). Adults cause severe damage to the buds, new leaves and flowers are active. Effective chemical control methods of this insect are discussed.