Origin and significance
.At present, the farmers have the use of insecticides in the prevention of insect enemies in rice fields many due to effective, fast and can be easily purchased. The insecticides each type is affected. Harmful to living things and the environment.It also affects a variety of ecosystems in paddy field with m (2545) reported using substances which are fipronil insecticides. The entomology and zoology, plant protection research and development office, the Department of agriculture, recommend the use ofHas made a variety of insects in paddy field lower than convert no substance to 7.3 - 17.6%, which in reality of the ecosystem in paddy field consists of a variety of creatures a lot The natural enemy of rice insect pests such as parasites and predators than 100 type, which more than rice insect pests 5-6 times (intuition.2545) the use of insecticides. In addition to the good performance, and is safe to environment, and it also does not cause impact followed. The use of insecticides, inappropriate may make the ecology balance, such as.Make 71 planthopper outbreaks resurgence (add) and make the quantity of natural enemies, the name spider rice decreased as well (intuition,2545; Tanaka et, al.2000) or even insecticides recommended for use in paddy field, it may affect the natural enemies. Some kinds of Preetha et al (2009) reported. Of imidacloprid, and thiamethoxam Lee in danger พรอก quartz and BP MC is the harm to the แตนเบียน.Chilonis so use of pest of rice, should choose appropriate by regardless of efficiency and affect the ecosystem is minimal. In addition to the use of insecticides. There are other ways that can prevent eliminate pests, such as.The fungus Beauveria on controlling Planthopper and green leafhopper, which found that made the full age of insects such 58 disease.And 75 62.50% respectively (diamond, heart2550) the advantages of fungi, such as no toxic residue and safe for the environment. But there are limits, such as time to disease and insects for several days. (3-7 days), Ta involve a suitable environment, etc., (diamond heart2547). Besides, there are other ways such as using biologically fermented, which is currently available in the trade. So easy to use more benefits of biologically fermented products such as the growth of plants.Etc. (HARP SEO and free,2547) however, when there is an enemy of rice insecticides is also needed. Therefore, to study the impact of the use of insecticides. Therefore, it is important and necessary to be informative.Right, this study aims to investigate the effects of the pest of rice. Introduction on the natural enemy that is important in the paddy field
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