Study On The Diversity Of Garden Pests And The Control Of Main Pests In Jiamusi City

Objective: Through the investigation of garden pests in different habitats in 6 sample plots,the population structure of garden pests was determined,the distribution and occurrence characteristics of garden pests were clarified,the occurrence law of garden pests in different habitats was summarized,the diversity of garden pests in different habitats was analyzed,and the dominant species of pests endangering garden plants were determined.The control effects of three pesticides on four dominant garden pests were compared,and the types and doses of pesticides suitable for controlling garden pest were selected.Methods: The field investigation is carried out during the growth period of garden plants,and the garden pests were investigated by observation method,net capture method and yellow disc method.The number of pests was counted and recorded,and the ecological index was analyzed.Three kinds of pesticides were used to control the larvae of Ambrostoma uadriimpressum,Dendrolimus superans,Aphrophora costalis and Rhynchaenus empopulifolis.Distilled water was used as the blank control group to compare the control effects of different pesticides.Results: In this study,13832 pests were recorded in 6 sample plots,belonging to 6orders and 48 families 111 Genus and 121 species.The proportion of families,genera and species of Lepidoptera pests was the highest.The dominant species of garden pests include the pest of Populus,Rhynchaenus empopulifolis,Chrysomela populi,Anoplophora glabripennis,the pest of Salix,Aphrophora costalis,the pest of Ulmus,Ambrostoma uadriimpressum,Orchestes alni,the pest of Picea,Adelges larici and Dendrolimus superans,the pest of Armeniaca,Didesmococcus koreanus and Dendrolimus superansr,the main pest of Pinus sylvestris.Comparison of control effects of three pesticides:The control effect of the larva of Ambrostoma uadriimpressum was over 91 % with 500 times of 1.8 % avermectin oil;When Dendrolimus superans larvae were treated with 0.3 % matrine 1000 times,the control effect was more than 93 %;There is a foam layer on Aphrophora costalis,so the biological pesticide is not easy to invade the nymphs.The control effect of 2.5 %cypermethrin 500 times solution is more than 97 %.There are leaf bracts outside the diving Rhynchaenus empopulifolis,the control effect of 2.5% cypermethrin 500 times solution was more than 93%.Conclusion: Sifengshan scenic spot has the most species of garden pests;the largest number of individual pests in Jiexin park;the individual number of garden pests in arbor habitat is the largest.The shrub habitat is rich in plant species,a large number of plants,and the harm of garden pests is serious.The diversity index of garden pests in the lawn habitat of Shuiyuan shan Park and Shuangyong park is the highest,the similarity between shrub habitat and hedgerow habitat in Sifengshan scenic spot is the highest,and the similarity between arbor habitat and lawn habitat in Jiexin park is the lowest.The results of efficacy test showed that 1.8% abamectin as a microbial pesticide had a good control effect on Ambrostoma uadriimpressum,0.3% matrine is a botanical pesticide with good control effect on Dendrolimus superans.The characteristics of these two biopesticides are beneficial to environmental protection,harmless to human beings and animals,and belong to green pollution-free biopesticides.2.5% beta-cypermethrin has a good control effect,but as a chemical pesticide,it can effectively control the number of pests when used in large numbers.