关键词: 茄二十八星瓢虫')">茄二十八星瓢虫, 行为')">行为, 产卵')">产卵, 光周期')">光周期, 光期')">光期, 暗期')">暗期, 光源')">LED光源

Abstract: 【Aim】 This study aims to clarify the effects of photoperiod and LED light on such behaviors as feeding, walking, mating and egg-laying of Henosepilachna vigintioctopunctata adults, so as to provide a scientific basis and technical guidance for forecasting and integrated management of this pest. 【Methods】 Experiments were conducted under the conditions of white fluorescent light intensity about 500 lx in photophase, and RH 75%±2%. The feeding, walking, mating and egg-laying behaviors of H. vigintioctopunctata adults were observed under different photoperiods (16L∶8D,15L∶9D,14L∶10D,13L∶11D,12L∶12D and11L∶13D) at30℃, and under different LED light (red, yellow, blue, green, and white light, represented by12L∶12R,12L∶12Y,12L∶12B,12L∶12G, and12L∶12W, respectively) with no light (12L∶12D) as the control in scotophase at26℃. 【Results】 When the photophase length increased from 13 h to 16 h, the feeding frequency of H. vigintioctopunctata adults increased. When the photophase length increased from 12 h to 15 h, the number of eggs laid also increased. The feeding frequencies in14L∶10D and13L∶11D groups (45.25 and 25.00 times/5 pairs, respectively) were significantly lower than those in other groups. Significantly fewer eggs were laid in11L∶13D group (only 7.25 eggs/5♀) than in other groups. The feeding frequency (112.50 times/5 pairs) in the blue light group in scotophase was significantly higher than those in the yellow and green light groups (77.0 and 66.25 times/5 pairs, respectively). Significantly more eggs were laid in the yellow and green light groups (261.50 and 285.50 eggs/5♀, respectively) than in the control group. 【Conclusion】 With the increase of photophase, the feeding frequency and number of eggs laid of H. vigintioctopunctata adults increase. Blue light in scotophase can increase the feeding frequency of H. vigintioctopunctata adults, while the yellow and green light lead to the increase in the number of eggs laid. Photoperiod and LED light have no significant effect on the walking and mating behaviors of H. vigintioctopunctata adults.

Key words: Henosepilachna vigintioctopunctata, behavior, oviposition, photoperiod, photophase, scotophase, LED light