The new methods for controlling white grubs in Landscape management

Despite the fast technology developing, industry and increasing environment pollution, human society has entered to a stage of awareness and appreciation from nature and environment that searches its relieve and health in connection with its environment. Ecologists believe that it can be help to the environment improvement and provide conditions for better and healthier life by establishing landscapes and parks. One of the pests that damage to the lawn and ornamental trees very severely is the some Scarabaeidae family larva (white grubs).This larva causes damaging and deracinating the lawn by feeding from the plant root. Qazvin has about 460 hectares landscapes that this pest damages to many parts of it. Until now, available methods can not be success in controlling this pest, so this research was done in year 2006 in Qazvin on privet (Ligustrum vulgare) and in T-test experimental design for introducing a new method to solve this problem. Preventive control treatments included Thiamethoxam 0.0005, Imidacloprid 350 SC, 0.001, 0.002 and 0.003 and curative control treatments included Carbaryl 85% WP 0.005, 0.002, 0.003 and 0.005. Imidacloprid (0.003) had the best effect for preventive control and Carbaryl (0.005) was most effective treatment in curative control.