论文部分内容阅读
研究了5种不同品种萝卜苗对小菜蛾生长发育和繁殖的影响。结果表明,小菜蛾对5种萝卜苗有不同的产卵嗜好性。产卵量从低到高依次是红衣天使<四季青<小五樱<玉笋<韩白龙(p<0.05)。小菜蛾在红衣天使和玉笋上发育历期较长,在四季青上发育历期较短;在韩白龙上的成活率最高,在红衣天使上的成活率最低(p<0.05)。取食不同品种萝卜苗的小菜蛾F1代雌、雄成虫寿命之间差异不显著(p>0.05),而取食红衣天使、韩白龙、四季青的小菜蛾F1代雌虫的产卵期较长,取食小五樱、玉笋的小菜蛾F1代雌虫的产卵期较短。以韩白龙为寄主植物的小菜蛾F1代雌虫产卵量最多(112粒/头),而以红衣天使为寄主植物的小菜蛾F1代雌虫一生产卵量最低(91.84粒/头),两者之间差异显著(p<0.05)。小菜蛾在红衣天使上的内禀增长率(rm=0.13)、净增值率(R0=12.73)和周限增长率(λ=1.14)最小,说明其不利于小菜蛾的生长发育和繁殖。
The effects of five different varieties of radish seedlings on the growth and reproduction of Plutella xylostella were studied. The results showed that Plutella xylostella had different egg-laying preference to five kinds of radish seedlings. From low to high, the fecundity was red angels 0.05). However, the oviposition period of F1 female of Plutella xylostella Long, feeding on small five cherry, asparagus diamondback moth F1 generation females spawning period is shorter. The F1 generation females had the most fecundity (112 grains / head) in the diamondback moth (Plutella xylostella), while the F1 fecundity in the diamondback moth (F1) was the lowest (91.84 grains per head) The difference between the two groups was significant (p <0.05). The intrinsic rate of increase (rm = 0.13), the net increment rate (R0 = 12.73) and the growth rate of the limit (λ = 1.14) of Plutella xylostella were the least on the red angels, indicating that it is not conducive to the growth and reproduction of diamondback moth.