Instituto de Investigaciones Agropecuarias y Forestales, Univerdad Michoacana de San Nicolás de Hidalgo, Km. 9.5 Carr, Morelia-Zinapécuaro, 58880 Tarímbaro, Michoacán, Mexico.
J Econ Entomol. 2011 Aug;104(4):1229-35. doi: 10.1603/ec10450.
The long-term effects of methoxyfenozide on the longevity and reproductive processes of beet armyworm, Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae), adults were assessed after exposure by ingestion. Methoxyfenozide significantly reduced adult male longevity compared with females by 1.1 and 1.5 d at 75 and 150 mg (AI)/liter, respectively. Fecundity decreased by >60% with both concentrations at 72 and 96 h after treatment, but at 48 h, no significant effect was observed. The carbohydrate, protein, and lipid content in the eggs were determined as representatives of the biochemical effects of methoxyfenozide associated with the disruption of reproductive processes. The content of carbohydrates in the eggs laid 48 h at treatment was similar to that of controls, but it increased by approximately 1.5 and 2-fold in eggs laid after 72 and 96 h, respectively, compared with controls (15 microg per egg). Protein content was reduced approximately 2.5 and approximately 3-fold for each treatment concentration, respectively, compared with the controls (25 and 23 microg per egg for 75 and 150 mg [AI]/liter, respectively) in eggs collected 72 and 96 h after treatment. Lipid content significantly decreased by approximately 1.6-fold in both treatment concentrations in eggs collected at 48 and 96 h after treatment compared with the controls (24 and 21 microg per egg for 48 and 96, respectively), but it was similar to controls (approximately 19 microg per egg) at 72 h (approximately 15 microg per egg) for both concentrations. The biochemical effects of methoxyfenozide on S. exigua egg formation detected in this work are consistent with the reduction in fertility observed, as reported previously.
甲氧虫酰肼对甜菜夜蛾（Spodoptera exigua（Hübner））（鳞翅目：夜蛾科）成虫寿命和生殖过程的长期影响，通过摄食进行了评估。甲氧虫酰肼显著降低了雄虫的寿命，与雌虫相比，分别在 75 和 150mg（AI）/升时降低了 1.1 和 1.5 天。在处理后 72 和 96 小时，两种浓度的产卵量均减少了>60%，但在 48 小时，未观察到显著影响。以卵中的碳水化合物、蛋白质和脂质含量作为与生殖过程破坏相关的甲氧虫酰肼生化影响的代表。处理后 48 小时产卵的碳水化合物含量与对照相似，但与对照相比，分别在处理后 72 和 96 小时产卵中增加了约 1.5 和 2 倍（每个卵 15μg）。蛋白质含量分别比对照减少了约 2.5 和 3 倍，对于每个处理浓度（分别为 25 和 23μg/个卵，对于 75 和 150mg[AI]/升），与对照相比，处理后 72 和 96 小时收集的卵中，蛋白质含量分别减少了约 2.5 和 3 倍（分别为 25 和 23μg/个卵，对于 75 和 150mg[AI]/升）。在处理后 48 和 96 小时收集的卵中，脂质含量分别比对照减少了约 1.6 倍（每个卵 24 和 21μg，分别为 48 和 96 小时），但与对照相似（每个卵约 19μg），对于两个浓度，在处理后 72 小时（每个卵约 15μg）。本研究中检测到的甲氧虫酰肼对 S.exigua 卵形成的生化影响与先前报道的生育力降低一致。
