Laboratory of Applied Entomology and Zoology, Faculty of Agriculture, Ibaraki University, Ami, Ibaraki, 300-0393, Japan.
Exp Appl Acarol. 2010 Nov;52(3):239-59. doi: 10.1007/s10493-010-9362-z. Epub 2010 Apr 10.
The tomato red spider mite Tetranychus evansi Baker et Pritchard occurs on solanaceous plants, and causes serious damage to a variety of crops in Africa and Europe. In 2001 this species was also found in Japan, on nightshade (Solanum nigrum L.), and its invasion to solanaceous of agricultural importance is feasible. To evaluate its potential severity as a pest, the present study assessed the life-history parameters, such as the rate of development and the intrinsic rate of natural increase (r(m)), on S. nigrum for T. evansi collected on seven sites worldwide. Increasing temperatures between 15 and 32.5°C significantly increased the developmental rate of the seven strains while immature developmental duration was about the same at 32.5-40°C. The rate of egg-to-adult development [(% hatch) × (% survival)] exceeded 88% at temperatures between 15 and 37.5°C. The lower thermal thresholds (LT) were 11.9-12.5°C for both egg-to-adult and egg-to-egg development. The optimum developmental temperatures ranged from 36.7 to 43.8°C and the upper developmental threshold (UT) ranged from 45.2 to 59.4°C. The r (m)-values became higher with temperature increasing from 15 to 35°C. The r (m)-values at 25°C ranged from 0.265 to 0.277 which are relatively high for species of the genus Tetranychus. These results indicate that T. evansi after invasion into Japan has the potential to become a serious pest on solanaceous crops, just the same as in Africa and Europe.
番茄红蜘蛛 Tetranychus evansi Baker et Pritchard 发生在茄科植物上，对非洲和欧洲的多种作物造成严重损害。2001 年，该物种也在日本的茄属植物（Solanum nigrum L.）上被发现，它对茄科重要作物的入侵是可行的。为了评估其作为害虫的潜在严重程度，本研究评估了在七个全球采集的番茄红蜘蛛种群在茄属植物 S. nigrum 上的生活史参数，如发育率和内禀增长率（r(m)）。在 15 至 32.5°C 之间，温度的升高显著增加了这七个种群的发育率，而在 32.5-40°C 之间，幼体发育持续时间大致相同。在 15 至 37.5°C 之间，卵至成虫的发育率[（%孵化）×（%存活）]超过 88%。卵至成虫和卵至卵发育的低温下限（LT）分别为 11.9-12.5°C。最佳发育温度范围为 36.7 至 43.8°C，上限发育温度范围为 45.2 至 59.4°C。r(m)值随着温度从 15 到 35°C 的升高而升高。在 25°C 时，r(m)值在 0.265 到 0.277 之间，对于属内的物种来说相对较高。这些结果表明，番茄红蜘蛛入侵日本后，有可能成为茄科作物上的一种严重害虫，就像在非洲和欧洲一样。
