Agbodzavu M K, Osiemo-Lagat Z, Gikungu M, Ekesi S, Fiaboe K K M
Zoology Department, Jomo Kenyatta University of Agriculture and Technology (JKUAT), P.O. Box 62000-00200 Nairobi, Kenya.
Plant Health Unit, International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30772-00100, Nairobi, Kenya.
Bull Entomol Res. 2020 Oct;110(5):577-587. doi: 10.1017/S0007485319000920. Epub 2020 Feb 18.
The temperature-dependent development of Apanteles hemara (Nixon), a larval endoparasitoid of the devastating amaranth pest Spoladea recurvalis (F.) was studied in the laboratory at six constant temperatures (10, 15, 20, 25, 30 and 35 °C), a photoperiod of 12L:12D and a relative humidity of 60-70%. Developmental time decreased significantly with increasing temperature within the range of 15-30 °C. The parasitoid's pupal mortality, successful parasitism rate, adult emergence rate and longevity, sex ratio and fecundity were affected by temperature. The population of A. hemara failed to develop at 10 and 35 °C. The development threshold (Tmin) and the thermal constant (K) were calculated by the linear model while the lethal temperature (Tmax) was determined by the Lactin-1 model. The estimated values of Tmin, Tmax and K by the two models were 10.3 °C, 35.0 °C and 185.18 DD respectively for the total immature development. The estimated value of the optimum temperature using the Taylor model was 30.8 °C. This is the first study to report on the effect of temperature on the developmental parameters of A. hemara giving an insight into its biology. The implications of these findings for the use of A. hemara in biological control are discussed.
研究了毁灭性苋菜害虫斜纹夜蛾幼虫内寄生蜂赫马潜蝇（Apanteles hemara (Nixon)）在实验室六个恒定温度（10、15、20、25、30和35℃）、光周期12L:12D及相对湿度60 - 70%条件下随温度变化的发育情况。在15 - 30℃范围内，发育时间随温度升高显著缩短。该寄生蜂的蛹死亡率、成功寄生率、成虫羽化率及寿命、性别比和繁殖力均受温度影响。赫马潜蝇种群在10℃和35℃时无法发育。发育阈值（Tmin）和热常数（K）通过线性模型计算，致死温度（Tmax）由Lactin - 1模型确定。两个模型对整个未成熟发育阶段的Tmin、Tmax和K的估计值分别为10.3℃、35.0℃和185.18日度。使用泰勒模型估计的最适温度值为30.8℃。这是首次报道温度对赫马潜蝇发育参数影响的研究，深入了解了其生物学特性。讨论了这些发现对利用赫马潜蝇进行生物防治的意义。
