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【目的】了解茶多酚对亚洲玉米螟生长发育和生殖的影响。【方法】采用摄食毒力法,在室内测定了茶多酚对亚洲玉米螟(Ostrinia furnacalis Güenée)生长发育的影响。【结果】茶多酚对亚洲玉米螟幼虫的LC50为2.185 0 mg/g;对亚洲玉米螟幼虫的相对生长率、食物利用率、食物转化率和近似消化率无显著影响;延长了亚洲玉米螟的4龄龄期,其在低含量茶多酚(1.6 mg/g)的情况就达到显著差异,5龄龄期整体差异不大,对亚洲玉米螟的蛹重在中含量茶多酚(2.4 mg/g)的条件下差异显著,对其蛹期无明显差异;对成虫寿命无明显影响,降低了单雌产卵量,高含量茶多酚(4.0 mg/g)组的平均单雌产卵量仅为对照组的43.64%,低含量茶多酚(0.8 mg/g)组的净生殖力与对照组差异显著(P<0.05),内禀增长率和周限增长率均降低。【结论】饲喂亚洲玉米螟3龄幼虫茶多酚可以有效降低后代种群基数,有利于该虫的控制。
【Objective】 To understand the effect of tea polyphenols on the growth and reproduction of Asian corn borer. 【Method】 The effects of tea polyphenols on the growth and development of Ostrinia furnacalis Güenée were determined indoors by feeding toxicity method. 【Result】 The results showed that the LC50 of tea polyphenols to Asian corn borer larvae was 2.185 0 mg / g, and had no significant effect on the relative growth rate, food utilization rate, food conversion rate and approximate digestibility of Asian corn borer larvae. Of the 4th instar stage, which reached the significant difference in the case of the low content of tea polyphenols (1.6 mg / g), but there was not much difference in the 5-year-old age. The content of polyphenols in the Asian corn borer was 2.4 mg / g), there was no significant difference in the pupal stage, no significant effect on adult longevity, the average number of single fecundity The amount of eggs was only 43.64% of that in the control group. The net fertility of the group with low content of tea polyphenol (0.8 mg / g) was significantly different from that of the control group (P <0.05), while the intrinsic rate of increase and the rate of the growth of the limit were all decreased. 【Conclusion】 The feeding of tea polyphenol from 3rd instar larvae of Asian corn borer can effectively reduce the population base of the offspring, which is beneficial to the control of this pest.