为明确加州新小绥螨Neoseiulus californicus(McGregor)对土耳其斯坦叶螨Tetranychus turkestani(Ugarov et Nikolski)的捕食潜力,采用捕食功能反应方法,研究了加州新小绥螨对土耳其斯坦叶螨各螨态的捕食作用。加州新小绥螨对雌成螨、...为明确加州新小绥螨Neoseiulus californicus(McGregor)对土耳其斯坦叶螨Tetranychus turkestani(Ugarov et Nikolski)的捕食潜力,采用捕食功能反应方法,研究了加州新小绥螨对土耳其斯坦叶螨各螨态的捕食作用。加州新小绥螨对雌成螨、若螨、卵的选择性捕食系数分别为0.44、1.25和1.35。在不同温度条件下,加州新小绥螨对土耳其斯坦叶螨的功能反应均属于Holling-Ⅱ型;28℃时捕食能力最强,对土耳其斯坦叶螨雌成螨、若螨和卵的攻击系数分别是0.6279、0.7203和0.7554,最大日捕食量分别为10.81头、28.49头和40.82粒。在相同温度下,加州新小绥螨雌成螨寻找效应随着猎物密度的增加而降低;在相同密度下,寻找效应随温度的升高先增加后减小,在28℃时寻找效应最高,为0.535。加州新小绥螨的捕食作用存在较强的种内干扰作用(m=0.520),随着捕食者密度的增大,平均捕食量逐渐减少,捕食作用率也相应降低。研究表明加州新小绥螨对土耳其斯坦叶螨具有很好的控制潜力。展开更多
为了确定加州新小绥螨Neoseiulus californicus(McGregor)的国内品系在生物防治中的潜力,采用捕食者功能反应方法,研究了加州新小绥螨、江原钝绥螨Amblyseius eharai Amitai et Swirski、尼氏真绥螨Euseius nicholsi(Ehara et Lee)和拟...为了确定加州新小绥螨Neoseiulus californicus(McGregor)的国内品系在生物防治中的潜力,采用捕食者功能反应方法,研究了加州新小绥螨、江原钝绥螨Amblyseius eharai Amitai et Swirski、尼氏真绥螨Euseius nicholsi(Ehara et Lee)和拟长毛钝绥螨A.pseudolongispinosus Xin,Liang et Ke对柑橘全爪螨Panonychus citri AaGregor的捕食作用,加州新小绥螨对柑橘全爪螨的功能反应可以很好地拟合HollingⅡ圆盘方程,对柑橘全爪螨卵的捕食能力显著高于其它3种捕食螨,4种捕食螨对柑橘全爪螨卵的功能反应参数a/Th分别为20.8342、6.9458、0和6.1634;加州新小绥螨对柑橘全爪螨卵、幼螨、前若螨、后若螨和成螨功能反应分别为20.8342、42.0721、29.1849、22.1204和5.6284。加州新小绥螨密度越大,柑橘全爪螨种群数量下降越快,在益、害比为5∶30下,柑橘全爪螨种群数量在第4天就能得到控制。结果表明,加州新小绥螨国内品系对柑橘全爪螨表现出很大的控制潜力。展开更多
This study was carried out on the ability of predatory thrips Scolothrips longi- cornis Priesner to feed on 2 phytoseiid species and vice versa. Also the effect of predation of Neoseiulus californicus （McGregor） on ...This study was carried out on the ability of predatory thrips Scolothrips longi- cornis Priesner to feed on 2 phytoseiid species and vice versa. Also the effect of predation of Neoseiulus californicus （McGregor） on Typhlodromus bagdasarjani Wainstein and Aru- tunjan and vice versa was evaluated. The larvae, prepupae, and pupae of thrips and the eggs, larvae, and protonymphs of phytoseiids were selected as intraguild prey. The in- traguild predation （IGP） among S. longicornis and 2 phytoseiid species was unidirectional and in favor of phytoseiids, i.e., S. longicornis was not able to feed on larval stages of 2 phytoseiids. However, N. californicus and T. bagdasarjani fed on the 1st instar larvae （1.39 and 0.80 per day）, 2nd instar larvae （0.87 and 0.55 per day）, prepupae （0.51 and 0.48 per day）, and pupae of thrips （0.51 and 0.49 per day, respectively）. Both phytoseiids fed on eggs, larvae, and protonymphal stages of each other. Females of N. californicus con- sumed more phytoseiid larvae （2.49 per day） than T. bagdasarjani, which consumed 1.08 N. californicus larvae per day. When Tetranychus urticae was presented as an extraguild prey, intensity oflGP between 2 species ofphytoseiids and on larval stages ofS. longicornis reduced significantly. Therefore, it is concluded that （i） IGP existed among the 3 examined species and lack of feeding of S. longicornis on 2 phytoseiid species can be justified by its feeding type （monophagy）, （ii） N. californicus was much more prone to IGP than was T. bagdasarjani.展开更多
文摘为明确加州新小绥螨Neoseiulus californicus(McGregor)对土耳其斯坦叶螨Tetranychus turkestani(Ugarov et Nikolski)的捕食潜力,采用捕食功能反应方法,研究了加州新小绥螨对土耳其斯坦叶螨各螨态的捕食作用。加州新小绥螨对雌成螨、若螨、卵的选择性捕食系数分别为0.44、1.25和1.35。在不同温度条件下,加州新小绥螨对土耳其斯坦叶螨的功能反应均属于Holling-Ⅱ型;28℃时捕食能力最强,对土耳其斯坦叶螨雌成螨、若螨和卵的攻击系数分别是0.6279、0.7203和0.7554,最大日捕食量分别为10.81头、28.49头和40.82粒。在相同温度下,加州新小绥螨雌成螨寻找效应随着猎物密度的增加而降低;在相同密度下,寻找效应随温度的升高先增加后减小,在28℃时寻找效应最高,为0.535。加州新小绥螨的捕食作用存在较强的种内干扰作用(m=0.520),随着捕食者密度的增大,平均捕食量逐渐减少,捕食作用率也相应降低。研究表明加州新小绥螨对土耳其斯坦叶螨具有很好的控制潜力。
文摘为了确定加州新小绥螨Neoseiulus californicus(McGregor)的国内品系在生物防治中的潜力,采用捕食者功能反应方法,研究了加州新小绥螨、江原钝绥螨Amblyseius eharai Amitai et Swirski、尼氏真绥螨Euseius nicholsi(Ehara et Lee)和拟长毛钝绥螨A.pseudolongispinosus Xin,Liang et Ke对柑橘全爪螨Panonychus citri AaGregor的捕食作用,加州新小绥螨对柑橘全爪螨的功能反应可以很好地拟合HollingⅡ圆盘方程,对柑橘全爪螨卵的捕食能力显著高于其它3种捕食螨,4种捕食螨对柑橘全爪螨卵的功能反应参数a/Th分别为20.8342、6.9458、0和6.1634;加州新小绥螨对柑橘全爪螨卵、幼螨、前若螨、后若螨和成螨功能反应分别为20.8342、42.0721、29.1849、22.1204和5.6284。加州新小绥螨密度越大,柑橘全爪螨种群数量下降越快,在益、害比为5∶30下,柑橘全爪螨种群数量在第4天就能得到控制。结果表明,加州新小绥螨国内品系对柑橘全爪螨表现出很大的控制潜力。
文摘This study was carried out on the ability of predatory thrips Scolothrips longi- cornis Priesner to feed on 2 phytoseiid species and vice versa. Also the effect of predation of Neoseiulus californicus （McGregor） on Typhlodromus bagdasarjani Wainstein and Aru- tunjan and vice versa was evaluated. The larvae, prepupae, and pupae of thrips and the eggs, larvae, and protonymphs of phytoseiids were selected as intraguild prey. The in- traguild predation （IGP） among S. longicornis and 2 phytoseiid species was unidirectional and in favor of phytoseiids, i.e., S. longicornis was not able to feed on larval stages of 2 phytoseiids. However, N. californicus and T. bagdasarjani fed on the 1st instar larvae （1.39 and 0.80 per day）, 2nd instar larvae （0.87 and 0.55 per day）, prepupae （0.51 and 0.48 per day）, and pupae of thrips （0.51 and 0.49 per day, respectively）. Both phytoseiids fed on eggs, larvae, and protonymphal stages of each other. Females of N. californicus con- sumed more phytoseiid larvae （2.49 per day） than T. bagdasarjani, which consumed 1.08 N. californicus larvae per day. When Tetranychus urticae was presented as an extraguild prey, intensity oflGP between 2 species ofphytoseiids and on larval stages ofS. longicornis reduced significantly. Therefore, it is concluded that （i） IGP existed among the 3 examined species and lack of feeding of S. longicornis on 2 phytoseiid species can be justified by its feeding type （monophagy）, （ii） N. californicus was much more prone to IGP than was T. bagdasarjani.
