Entomology Division, UPASI Tea Research Foundation Tea Research Institute, Nirar Dam (BPO), Valparai, Coimbatore District, 642127, Tamil Nadu, India.
Exp Appl Acarol. 2013 Jun;60(2):229-40. doi: 10.1007/s10493-012-9649-3. Epub 2012 Dec 18.
Life table and predation of the predatory mite Neoseiulus longispinosus (Evans) on the red spider mite (RSM), Oligonychus coffeae (Nietner), a major pest of tea in India, were studied in the laboratory. Developmental time from egg to adult varied from 4 to 14 days at 30 to 15 °C, respectively; at 35 °C no larva survived. Survival of immature stages was more than 94 % at all temperatures. Threshold temperature for development of immature stages of females and males was 10 and 9.9 °C, respectively, and thermal constant was 84.03 degree-days for females and 80 for males. Sex ratio was female biased and temperature (20-30 °C) had no clear effect on sex determination. Egg hatchability was 73 % at 35 °C and >97 % at lower temperatures. Average number of eggs laid per female/day was higher at 30 °C than at 20 or 25 °C. The highest net reproductive rate (R 0) was 40.7, at 20 °C. Mean generation time (T) decreased from 28 to 13 days with temperature increasing from 20 to 30 °C. Weekly multiplication (6.5) and intrinsic rate of natural increase (r m ) (0.268) were highest at 30 °C. Males lived longer than females at every temperature tested. Longevity was highest at 20 °C (50 days for females and 55 for males). Survival and longevity were adversely affected by temperature above 30 °C. Daily consumption of prey increased with the advancement of predator's life stages; adult females consumed the highest numbers of prey items, preferably larvae and nymphs.
在实验室条件下，研究了捕食性螨虫尼氏真绥螨（Neoseiulus longispinosus）（Evans）对印度茶园主要害虫红蜘蛛（RSM）（Oligonychus coffeae）（Nietner）的生命表和捕食作用。在 30-15°C 时，从卵到成虫的发育时间分别为 4-14 天；在 35°C 时，没有幼虫存活。在所有温度下，未成熟阶段的存活率均超过 94%。雌、雄螨幼期发育的阈值温度分别为 10 和 9.9°C，热常数分别为 84.03 度日和 80 度日。雌雄比偏向于雌性，温度（20-30°C）对性别决定没有明显影响。在 35°C 时，卵的孵化率为 73%，在较低温度时>97%。在 30°C 时，雌螨每天产卵数高于 20°C 或 25°C。在 20°C 时，净生殖率（R 0）最高，为 40.7。随着温度从 20°C 升高到 30°C，平均世代时间（T）从 28 天减少到 13 天。每周繁殖倍数（6.5）和内禀增长率（r m）（0.268）在 30°C 时最高。在每个测试温度下，雄螨的寿命均长于雌螨。在 20°C 时，寿命最高（雌螨为 50 天，雄螨为 55 天）。在高于 30°C 的温度下，生存和寿命均受到不利影响。随着捕食者生命阶段的推进，猎物的日消耗量增加；成年雌螨消耗的猎物数量最多，首选幼虫和若虫。
