关键词: 粮食安全, 粮食安全, 最小人均耕地面积, 耕地压力指数, 吴起县

Abstract:

The investigation and analysis of arthropods on early mature watermelon in the greenhouse were carried out in 2009 in Wuhan. The results showed that the arthropod communities on early mature watermelon in the greenhouse consisted of 3 classes, 12 orders, 55 families, 102 species. Among them, there are 36 species of phytophages (one kind of phytophages is domestic new record), 37 species of predators, 10 species of parasitoids and the other 19 species. The species numbers of the four groups account for 35.29%, 36.27%, 9.80%, 18.63% respectively, and the dominance indexes of the four groups were 0.4368, 0.2721, 0.0409, 0.2501 respectively. All of the arthropods could be divided into 4 nutrient classes, 6 guids and 22 groups. Thrips flavus Schrank and Aphis gossypii Glove were the dominant species of the arthropod pests, they were the major insect pests on early mature watermelon in the greenhouse to be controled.