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干草原区是指年均降雨量在300毫米以下,干燥度为2的草原区。植被种类少,多是一些极为耐干的草本、半灌木和小灌木,如沙蒿、骆驼蓬、徐长卿、白茨、猫头刺、柠条、柽柳等,是我国大西北主要草原类型。在此一特殊生态环境下分布着相应的特有昆虫类群,多为一般农区所罕见,普遍为害草原植物的各个部分,有的发生势态颇强,成为草原建设的灾害。但植保工作对草原害虫的研究和治理,尚未深涉。近年间,笔者以宁夏草原为代表,对其害虫的种类和害情作作了一些初步探索,成灾性种类作了饲养观察和药剂防治探索,现选择重要记述于下,
The steppe area refers to the grassland area where the average annual rainfall is below 300 mm and the dryness is 2. There are few vegetation species, mostly some extremely resistant to dry herbs, semi-shrubs and shrubs, such as Artemisia, Peganum harmala, Cynanchum, Baoci, cat head thorns, Caragana, Tamarix, etc., is the main type of grassland in Northwest China. In this special ecological environment, the distribution of the corresponding unique insect groups, mostly common in agricultural areas are rare, generally damage the various parts of the prairie plants, some quite powerful situation, a grass-roots disasters. However, research and management of grassland pests have not yet been discussed. In recent years, the author of Ningxia grassland as the representative of its pest species and damage made some preliminary exploration, disaster-prone species were made to observe the observation and prevention and treatment of pesticides, is now an important choice described in the next,