The African citrus triozidTrioza erytreaeDel Guercio (Hemiptera: Triozidae): temporal dynamics and susceptibility to entomopathogenic fungi in East Africa
The African citrus triozidTrioza erytreaeDel Guercio (Hemiptera: Triozidae): temporal dynamics and susceptibility to entomopathogenic fungi in East Africa
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DOI：
10.1007/s42690-020-00241-5
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发表时间：
2020-08-22
影响因子：
1.2
通讯作者：
Borgemeister, C.
中科院分区：
文献类型：
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作者：
Aidoo, Owusu Fordjour;Tanga, C. M.;Borgemeister, C.
非洲柑橘triozidTrioza erytreaeDel Guercio（半翅目：Triozidae）是最具破坏性的柑橘害虫。目前，T. 的生物学数据。 erytreaare 不足以获取分布、季节动态和昆虫病原体等重要参数。因此，我们确定了 T 的时间动态。肯尼亚沿三个不同海拔梯度生长的红刺。在低海拔地区，T 的雌性。 erytrea在二月下旬至三月初期间重新激活并开始产卵。 T 未成熟阶段的平均月数。 erytreaeper 红芽在二月达到顶峰，而成虫则在三月达到顶峰。对于中海拔地区，T.红蝽数量在二月份达到顶峰，但成虫在十二月份就已出现。在高海拔地区，6月份出现成虫，雌虫开始产卵。遮荫树上的赤杨种群密度与未遮荫树上的赤杨种群密度呈显着正相关。成虫密度与最高温度、平均温度、太阳辐射、蒸发量和露点之间存在显着差异。此外，本研究还评估了 11 种绿僵菌和 4 种白僵菌真菌分离株对抗成虫的效果。 Metarhizium anisopliaeICIPE 18 和 ICIPE 69 是最有效的分离株，在最短的 LT(50) 时间内（4.4 和 5.9 天）分别导致 97.5% 和 82.5% 的死亡率。花椒上是否存在柑橘木虱（Diaphorina citri Kuwayama）（半翅目：Liviidae）需要进一步调查。我们的研究结果为早期发现、监测和开发针对害虫的生物农药提供了相关信息。
The African citrus triozidTrioza erytreaeDel Guercio (Hemiptera: Triozidae) is the most destructive citrus pest. Presently, biological data onT. erytreaeare insufficient for important parameters like distribution, seasonal dynamics and entomopathogens. Therefore, we determined the temporal dynamics ofT. erytreaealong three different altitudinal gradients in Kenya. In low altitudes, females ofT. erytreaereactivated and started laying eggs between late February and early March. The mean monthly number of immature stages ofT. erytreaeper flush shoot peaked in February, whereas adults peaked in March. For mid-altitudes,T. erytreaemean populations peaked in February, but adults were already present in December. In high altitudes, adults appeared in June, and females began laying eggs.Trioza erytreaepopulation densities in shaded trees positively and significantly correlated with unshaded trees. There was a significant difference between adult density and maximum temperature, average temperature, solar radiation, evaporation and dew point. Furthermore, this study evaluated the effects of 11Metarhizium anisopliaeand 4Beauveria bassianafungal isolates against adultT. erytreaeunder laboratory conditions.Metarhizium anisopliaeICIPE 18 and ICIPE 69 were the most potent isolates, causing 97.5% and 82.5% mortalities within the shortest LT(50)time of 4.4 and 5.9 days, respectively. The presence ofDiaphorina citriKuwayama (Hemiptera: Liviidae) onZanthozylum capenserequires further investigation. Our findings provide relevant information for early detection, monitoring and developing biopesticides against the pest.