AN EXPERIMENTAL STUDY ON CHEMICAL CONTROL OF TOMICUS PINIPERDA IN GREEN AREAS IN SOUTHERN MOUNTAIN AND NORTHERN MOUNTAIN OF XINING CITY
Tomicus Piniperda is a main insect pest causing damage to green areas in southern mountainsand northern mountains of Xining City.An experiment on chemical control was conducted using systemic insecticides including 18％omethoate emulsion,5％imidacloprid emulsion,25％thiamethoxam water dispersible granules and Shuchongjing through trunk injection(insecticide bottle)+crown spraying,and application of dried insecticide mud+crown spraying.The results showed the best control effect of the application of dried omethoate mud+crown spraying against Tomicus Piniperda,followed by the application of dried thiamethoxam mud+crown spraying,and then Shuchongjing bottle+crown spraying with thiamethoxam.It demonstrates that preparing insecticide mud by adding orange peel essential oil to the stock solution of strong systemic insecticides and applying to the trunk from the base to the crown of Pinus tabuliformis,and spraying to the crown during the shoot transition period,which was could effectively killed the larvae and adults of Tomicus Piniperda under the bark.
Tomicus PiniperdaInsecticideTrunk injectionApplication of dried insecticide mudCrown spray
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