Abstract:

This study aimed to identify the dominant species of grasshopper and to find a method of prevention and control in west grassland of Heilongjiang province. There were 17 common species of grasshoppers that injured grassland in West of Heilongjiang Rangeland through investigation, of which there were 8 dominant species. These dominant species occurred differently in number and time according to separate vegetation. The best prevention and cure time was before 3 stadium grasshoppers. When dense of species group was bigger chemical control way should be taken to decrease insect population, opposite situation biological control method should be applied.The biological control was first way and the chemical control was second, both two ways were applied in order to realize the aim of prevention and cure of grasshoppers ultimately.