【摘要】 拟环纹豹蛛(Pardosa pseudoannulata)为水稻害虫的重要天敌,在湖北省武汉市以成蛛和幼蛛越冬,一年最多可发生三个世代,以第二代历期为最短,第三代最长.雌蛛历期长于雄蛛.温度对发育历期有较大影响,用二次曲线拟合其关系方程为:y=698.2369—40.8019+0.617x~2,h=0.9850,R=0.9839 δ=5.5281.在32℃时历期取极小值23.36d.全代发育起点温度为10.16℃,有效积温为1171.3日度.温度对产卵间隔、卵袋数、产卵量、幼蛛存活率、成蛛寿命均有较大影响.在25—32℃温度范围内,产卵量和幼蛛存活率高,该蛛有较强的抗高温能力.更多还原

【Abstract】 Pardosa pseudoannulata, an importaut natnral enemy of the rice insect pest, overwinters as adults aud larvae. Three generations occur within a year. The duration of the second generation is the shortest and that of the third one, the longest.The temperature has a major influence on the developmental duration. Expression of their relative equation with a quadratic curve is: y = 698.2369-40.8019X + 0.6167x2, h = 0.9850, R=0.9839, Q = 5.9821. At 32℃, it takes the minimal value of 23.36 days. The effective temperature summation of the whole generation is 1171.39 day degrees with the threshold temperature of 10.16℃.The temperature affects largely the intervals of oviposition, the number of egg sacs, the amount of eggs,the survival rate of larvae and the life-span of adults.Between 25℃-32℃, the amount of eggs aud the survival rate of larvae are high. The spider is quite high-temperature-resistant.更多还原