Wegbe Komlan, Cilas Christian, Decazy Bernard, Alauzet Claude, Dufour Bernard
Centre de Recherche Agronomique zone Forestière, BP 90 Kpalimé, Togo.
J Econ Entomol. 2003 Oct;96(5):1473-8. doi: 10.1093/jee/96.5.1473.
The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae), which exists in all coffee producing zones, is a major pest. The seriousness of this scolytid was assessed in Togolese plots spread over five agroclimatic zones, by determining the attack rate from a sample of coffee trees. The work was carried out over 2 yr and revealed that weight losses were proportional to the attack rates. The average infestation rates were 5.64% in the first year and 6.36% in the second year, while total production losses amounted to 2.60% and 3.18%, respectively, for the same periods. Generally speaking, attack rates in the plots were low and varied considerably within a given zone. Plantations located on plateau were more severely attacked than those in the plains. A relationship was established between total losses and the cost of insecticide treatment; this relationship was used to calculate an economic damage threshold beyond which control proves to be cost effective.
咖啡果小蠹（Hypothenemus hampei (Ferrari)，鞘翅目：小蠹科）存在于所有咖啡种植区，是一种主要害虫。通过测定咖啡树样本的受害率，对分布在多哥五个农业气候区的地块中这种小蠹的危害程度进行了评估。这项工作持续了两年，结果表明重量损失与受害率成正比。第一年的平均侵染率为5.64%，第二年为6.36%，而同期的总生产损失分别为2.60%和3.18%。总体而言，地块中的受害率较低，且在给定区域内差异很大。位于高原的种植园比平原的种植园受到的侵害更严重。确定了总损失与杀虫剂处理成本之间的关系；利用这种关系计算出了经济损害阈值，超过该阈值进行防治被证明具有成本效益。
