摘要
卵形异绒螨Ａｌｏｔｈｒｏｍｂｉｕｍｏｖａｔｕｍ幼螨对３种混合蚜虫种群的寄生作用，以控制棉蚜和禾谷缢管蚜种群效果较好，控制桃蚜种群效果较差，其平均寄生率分别为３２．０８％、３８．０１％和２８．０３％。成若螨捕食桃蚜和棉蚜的功能反应说明，其捕食量随蚜虫密度的增加而增大，蚜虫每增加１头，成若螨的平均捕食增长率达６７．０％和３４．３％，符合ＨｏｌｉｎｇⅡ模型，且成螨日最大捕食桃蚜１３．５头，若螨日最大捕食棉蚜６．８头，不存在隔日捕食现象。干扰效应试验说明，若螨捕食棉蚜随自身密度的增加而减少，平均捕食量减少９．９７％，干扰效应明显；而成螨捕食桃蚜却随自身密度的增加而增大，平均捕食量增长１７．３％，干扰效应较小。
The parasitic effect of larval Allothrombium ovatum on a
mixture aphids populations which include Aphis gossypii, Rhopalosiphum padi and Myzus
persicae was studied. The controlling effect on the former two is better than the last one.
Average parasitic rates to each aphids species are 32.08%,38.01% and 28.03%.The functional
response of adult and nymph mite on Myzus persicae and Aphis gossypii showed that
predatory quantity is increasing with the increasing of aphids population density, when aphids
add individually every day the predatory quantity increasing rate reach to 67.0% and
34.3%,which fit model Holling II. Adult mite can eat 13.5 aphids of Myzus persicae and the
nymph mite can eat 6.8 aphids per day at maximum. No every two days predatory case.
Disturbing effect test showed that the predatory quantity of nymph mite on Aphis gossypii is
decreasing with the increasing of itself population density, the average predatory quantity
decrease 9.97%. So it suggested that is the disturbing effect is significant. While the predatory
quantity of adult mite on Myzus persicae increasing with the increasing of itself density. The
average predatory quantity increase 17.3%, the disturbing effect is small.
出处
《西北农业学报》
CAS
CSCD
1999年第2期37-41,共5页
Acta Agriculturae Boreali-occidentalis Sinica
基金
陕西省自然科学基金
西北农业大学青年基金
关键词
卵形异绒螨
蚜虫
寄生
捕食
Allothrombium ovatum
Aphids
Parasitization
Predatory effect
