几种农田作物害鼠经济阈值的测定

1 引言 农田害鼠的危害经济阈值是害鼠防治的依据,也是害鼠管理的一个重要指标,王华弟等及邢林等曾报道过这方面的研究,但未能考虑害鼠群落中各种鼠的数量组成比例和危害强度的不同,1983年,在山东

Pest rodent economic thresholds of several crops.

In this paper, the pest rodent economic thresholds of corn, soybean, peanut and sweet potato are determined. The daily appetites of each species of rodents are determined by saturated supply with seeds, stems and leaves of the crops as well as wild grasses. Taking daily appetite ratios as equivalent coefficients of damage intensities of each species of rodents, it is considered that one Apodemusagrarus equals to 0.599 Cricetulus triton and one C. barabensis equals to 0.468 A. agrarius. The rodent community capture rates are translated into equivalent ones of abundant species C. triton, and the regression equations of crop yield losses and rodent community densities (represented by the equivalent C. triton capture rates) are calculated. The dynamic economic thresholds are: corn 272.70 L+1.26, soybean 106.08L+2.35, peanut 223.56L+2.94 and sweet potato 3344.48L+0.27, and the statical economic thresholds are respectively 2.26,2.92,3.36 and 15.19.