双翅目
3.Most susceptible species belong to the orders Lepidoptera, Diptera, and Coleoptera.
7.Among thembeloagingto Order Thysanura 1,Odonata 6,Blattaria 3,Mantodea 2,Isoptera 1,Orthoptera 25,Embioptera 1,Homoptera 8,Hemiptera 45, Coleoptera 48,Neuroptera 4,Lepidoptera 78,Diptera 10,Hymenoptera 29 species respectively.
10.Ninety one species of principal insect pests of the grassland and forage crop field were recorded from Gansu. These included 63 species of Orthoptera, 16 species of Homoptera, 2 species of Hymenoptera, 5 species of Thy sanoptera, 4 species of Diptera, and 1 species of Acarina

