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在本试验条件下,白背飞虱Sogatella furcifera(Horvath)、褐飞虱Nilaparvata lugens(stal)、灰飞虱Laodelphax striatellus(Fallen)实验种群的发育历期、发育速率、存活率、产卵量、内禀增长力、净增殖率、周限增长率等比较结果表明,以白背飞虱最大,种群发展最快;褐飞虱次之,种群发展速率居中;灰飞虱最小,种群发展最慢。3种稻飞虱理论上逐日分别以1.1633、1.1252和1.0801倍的增长率作几何级数增加,这为估计种群消长趋势提供科学依据。
Under the conditions of this experiment, the developmental duration, developmental rate, survival rate, fecundity, intrinsic population of experimental populations of Sogatella furcifera (Horvath), Nilaparvata lugens (Stal) and Laodelphax striatellus (Fallen) Growth rate, net growth rate, growth rate of the cycle and other comparisons showed that the population of whitebacked planthopper was the largest and the population developed fastest. The brown planthopper was the second, and the population development rate was the middle. The population of Laodelphax striatellus was the smallest and the population was the slowest. Three kinds of planthoppers in theory were day by day 1.1633,1.1252 and 1.0801 times the growth rate of geometric series for the increase, which provides a scientific basis for the estimation of population trends.