Homalotglus flaminus (Dalman) is an important natural enemy of the Chilocorus kuwanae. Its biological character-istic, life history, the action style on hosts were studied at Hongqi Forest Farm, Daqing City, Heilongji...Homalotglus flaminus (Dalman) is an important natural enemy of the Chilocorus kuwanae. Its biological character-istic, life history, the action style on hosts were studied at Hongqi Forest Farm, Daqing City, Heilongjiang Province from June 1998 to October 2000, in order to control H. flaminus and raise the control ability of Chilocorus kuwanae to Quadraspidiotus gigas pest. The observed results indicated that H. flaminus has two generation one year in study area, the pupating span is 12.7 d, life span of females and males is 17.6 d and 10.8 d respectively, egg span is 10 d, and the sex ratio of females to males is 1:3.展开更多
[Objective] The aim is to investigate the impact of different host plants, planting methods and directions on the damage law of Asterococcus muratae. [Method] The quantity of pests, size of female pests and quantity o...[Objective] The aim is to investigate the impact of different host plants, planting methods and directions on the damage law of Asterococcus muratae. [Method] The quantity of pests, size of female pests and quantity of ova of A. mu-ratae in Suzhou in different host plants under two planting methods and in four di-rections of a host plant were measured. [Result] A. muratae exhibits selectivity to host plants, and their quantity, female pest size and reproductive capacity are higher in Magnolia grandiflora（southern magnolia） than in other plants. The four directions of the host plant suffer to different extents, and the north part is usual y the most in-jured. Mass-planted southern magnolias are more seriously impacted than individual y-planted ones. Both size and weight of a female pest have significant linear relations with ovum quantity, and the weight of a female pest is more closely related to its ovum quantity. Based on the weight of a female pest, we can predict the exact ovum quantity according to the equation y=2E-05x＋0.003 7. [Conclusion] The research re-sults provide reference for making an effective control plan for A. muratae.展开更多
Quadraspidiotus gigas is a main kind of forest pest in Northeast China.Chilocorus kuwanae has a strong capability of controlling Quadraspidiotus gigas. Chilocorus kuwanae was mi grated and released for control of Qua...Quadraspidiotus gigas is a main kind of forest pest in Northeast China.Chilocorus kuwanae has a strong capability of controlling Quadraspidiotus gigas. Chilocorus kuwanae was mi grated and released for control of Quadraspidiotus gigas during 1992-93. The obvious conrol effect was obtained.展开更多
The occurrence, morphological characteristic, biological characteristic, population fluctuation and control methods of Asterococcus muratae were reviewed in the paper, and the research direction in the future was fore...The occurrence, morphological characteristic, biological characteristic, population fluctuation and control methods of Asterococcus muratae were reviewed in the paper, and the research direction in the future was forecasted, so as to provide reference for landscape management and other relevant departments to effec- tively control the insect.展开更多
基金This paper was supported by Natural Science and Foundation of Heilongjiang Province.
文摘Homalotglus flaminus (Dalman) is an important natural enemy of the Chilocorus kuwanae. Its biological character-istic, life history, the action style on hosts were studied at Hongqi Forest Farm, Daqing City, Heilongjiang Province from June 1998 to October 2000, in order to control H. flaminus and raise the control ability of Chilocorus kuwanae to Quadraspidiotus gigas pest. The observed results indicated that H. flaminus has two generation one year in study area, the pupating span is 12.7 d, life span of females and males is 17.6 d and 10.8 d respectively, egg span is 10 d, and the sex ratio of females to males is 1:3.
文摘[Objective] The aim is to investigate the impact of different host plants, planting methods and directions on the damage law of Asterococcus muratae. [Method] The quantity of pests, size of female pests and quantity of ova of A. mu-ratae in Suzhou in different host plants under two planting methods and in four di-rections of a host plant were measured. [Result] A. muratae exhibits selectivity to host plants, and their quantity, female pest size and reproductive capacity are higher in Magnolia grandiflora（southern magnolia） than in other plants. The four directions of the host plant suffer to different extents, and the north part is usual y the most in-jured. Mass-planted southern magnolias are more seriously impacted than individual y-planted ones. Both size and weight of a female pest have significant linear relations with ovum quantity, and the weight of a female pest is more closely related to its ovum quantity. Based on the weight of a female pest, we can predict the exact ovum quantity according to the equation y=2E-05x＋0.003 7. [Conclusion] The research re-sults provide reference for making an effective control plan for A. muratae.
文摘Quadraspidiotus gigas is a main kind of forest pest in Northeast China.Chilocorus kuwanae has a strong capability of controlling Quadraspidiotus gigas. Chilocorus kuwanae was mi grated and released for control of Quadraspidiotus gigas during 1992-93. The obvious conrol effect was obtained.
文摘The occurrence, morphological characteristic, biological characteristic, population fluctuation and control methods of Asterococcus muratae were reviewed in the paper, and the research direction in the future was forecasted, so as to provide reference for landscape management and other relevant departments to effec- tively control the insect.
