| 田 旭，金 杰，王富洋，史彩华，李家前，孙智荣，李文红,,不同龄期益蝽对粘虫各龄期幼虫的捕食功能[J].环境昆虫学报,(): |
| 不同龄期益蝽对粘虫各龄期幼虫的捕食功能 |
| Predatory functional response of different stages of Picromerus lewisi scott to different instars of Mythimna seperata walker |
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| DOI： |
| 中文关键词: 益蝽 粘虫 捕食功能 |
| 英文关键词:Picromerus lewisi Mythimna seperata Predation function |
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| 中文摘要: |
| 为评估益蝽对粘虫不同龄期幼虫的捕食潜能，本研究在室内条件下测定了益蝽若虫对粘虫幼虫的捕食功能。将益蝽按龄期进行24 h饥饿处理，以1头/罐置于塑料罐中，分别投喂不同数量和不同龄期的粘虫，统计不同龄期益蝽捕食粘虫的数量，使用圆盘方程拟合益蝽对粘虫的捕食功能曲线。益蝽若虫对粘虫具有较好的捕食能力，其3龄、4龄、5龄若虫对粘虫3龄、4龄、5龄幼虫均能捕食，捕食功能反应均符合HollingⅡ圆盘方程。3龄若虫对粘虫3龄、4龄、5龄幼虫的日最大捕食量分别为24.50头、29.90头、4.50头；瞬时攻击率分别为0.306、0.200、1.042；处理时间分别为0.041 h、0.033 h、0.224 h。4龄若虫对粘虫3龄、4龄、5龄幼虫的日最大捕食量分别为33.47头、15.60头、17.60头；瞬时攻击率分别为0.367、0.466、0.281；处理时间分别为0.030 h、0.064 h、0.057 h。5龄若虫对粘虫3龄、4龄、5龄幼虫的日最大捕食量分别为27.80头、17.20头、8.50头；瞬时攻击率分别为0.557、0.327、0.286；处理时间分别为0.036 h、0.058 h、0.117 h。结果表明益蝽对3～4龄粘虫有较好的控害潜能，对3龄幼虫的捕食量最大，对5龄幼虫的瞬时攻击率最高。 |
| 英文摘要: |
| To evaluate the predation potential of Picromerus lewisi against different instar larvae of Mythimna seperata, this study measured the predation function of P. lewisi nymph against M. seperata larvae under laboratory conditions. The tested P. lewisi were subjected to 24 h starvation previously. All tested P. lewisi were reared singly in a plastic jar fed with different numbers and stages of M. seperata. The number of P. lewisis preying on M. seperata at different stages was recorded, and the disc equation was used to fit the predatory function curve of P. lewisi against M. seperata. P. lewisi nymph had good predatory capability on M. seperata, and 3rd, 4th, and 5th nymphs could prey on the 3rd, 4th, and 5th larvae of M. seperata. The predatory function response fitted well to the Holling II disc equation. The theoretical maximum daily predation amounts of P. lewisi 3rd nymphs on M. seperata 3rd, 4th, and 5th larvae were 24.50, 29.90, and 4.50 preys, respectively, with attacking efficiency 0.306, 0.200, and 1.042 respectively, and prey handling time 0.041, 0.033, and 0.224 h, respectively. The theoretical daily maximum predation amounts of 4th nymphs on the 3rd, 4th, and 5th larvae of M. seperata was 33.47, 15.60, and 17.60 preys, respectively; with attacking efficiency 0.367, 0.466, and 0.281, respectively. The processing time was 0.030, 0.064, and 0.057 h, respectively. The theoretical daily maximum predation amounts of 5th nymphs on 3rd, 4th, and 5th larvae of M. seperata were 27.80, 17.20, and 8.50, respectively, with attacking efficiency 0.557, 0.327, and 0.286 preys, respectively, with prey handling time 0.036, 0.058, and 0.117 h, respectively. The results showed that P. lewisi had good control potential against the 3rd and 4th M. seperata, with the highest predation rate on the 3rd larvae and the highest instantaneous attack rate on the 5th larvae. |
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