辽南地区油桃桑白蚧的发生与防治技术

The Occurrence and Control of Pseudaulacaspis Pentagona in Nectarine in Southern Area of Liaoning Province

桑白蚧是辽南地区油桃上的一种重要害虫,在不同地区生活史和生活习性有较大的差异,因此摸清桑白蚧在该地区的发生规律,找出适当的防治时期和防治措施极为重要。经试验得知,桑白蚧的卵孵化盛期为每年的5月下旬,也是化学防治的关键时期。抓住桑白蚧的防治关键时期进行药剂防治,得出结论为:25%噻嗪酮可湿性粉剂1 500倍液+2.5%功夫菊酯2 500倍液为最佳药剂组合,防治效果突出,使虫口减退率达到97.2%。

Pseudaulacaspis pentagona is a kind of important pest in nectarine in Southern area of Liaoning province. Its life history and life habit have great alteration in different areas. So it is extremely significant to make its occurrence regularity clear in this area and find proper control period and measures accordingly. Through experiment, it has been found that the peak period of Pseudaulacaspis pentagona＇s eggs hatching is the last ten-day of May every year, and this period is also the critical stage of chemical control. Therefore,we should make use of this key period to conduct chemical control. Our conclusion is： the mixture of 25% Buprofezin WP 1500× ＋ 2.5%Cyhalothrin EC 2500× is the best match with prominent control effect and the reducing rate of pest population up to 97.2%.