滇中峨山县农田鼠情监测结果分析

Analysis of Observation of Rats in Farmland in Eshan County

１９９４－１９９７年采用系统调查法在滇中峨山县坝子对农田害鼠种群及发生动态进行监测结果表明：调查区捕到的害鼠隶属１目１科５种；室内优势种为褐家鼠，混合种群密度冬季最高，夏季最低，种群数量消长呈波浪形曲线发展；室外（水稻田和旱作地）优势种为褐家鼠和卡氏小鼠，混合种群密度春、秋两季高，夏、冬两季低，种群数量消长呈双峰曲线变动。农田药物灭鼠的最佳时间第一次为３月下旬～４月上旬，第二次为９月下旬～１０月上旬。且要区分农田毒饵和室内毒饵，方能全面提高灭效。

Using systemic investigation method,kinds and change of numbers of rats in farmland were observed in Eshan county(located in the middle of yunan provlnce)from 1994 to 1997. The results indicated that all kinds of rats traped belong to the same catalogue,The same family,and five strains. Rattus norv-egicus was the main kind of indoor rat. The density of all kinds of indoor rats was highest in winter,but lowest in Summer. The change of num- bers belonged to a wave curve. However,Rattus norvegicus and mus Caroli were the main kinds of rats in wildcin rice farmland and dry land). The density of all kinds of rats in wild was higher in spring and autum,and lower in winter and summer. The change of numbers be- longed to a two-peaked curre. The best time for exterminating rats with drug in farmland was about from the 20th March to the 10th Spril and from the 20th september to the 10th Octor- ber. For improving the results of ertermination rats,the toxic diets used in farmland and in- doors were not the same.