Departamento de Fitotecnia e Zootecnia, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista, BA, Brazil.
Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
J Econ Entomol. 2020 Jun 6;113(3):1399-1410. doi: 10.1093/jee/toaa017.
The Neotropical coffee leaf miner, Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842), is a key pest species of unshaded coffee plantations in Neotropical America, particularly in Brazil, where pest management involves intensive insecticide use. As a consequence, problems of resistance to conventional insecticides are frequent, and more recently developed insecticide molecules, such as diamide insecticides, are at risk of becoming ineffective. Thus, a survey of resistance to the diamide insecticide chlorantraniliprole was carried out in high-yield coffee-producing areas in the State of Bahia, Brazil. The likelihood of control failure with this insecticide was also assessed. Spatial dependence among the insect sampling sites was assessed and spatial mapping of chlorantraniliprole resistance and risk of control failure was carried out. The frequency of chlorantraniliprole resistant populations was high (34 out of 40 populations, or 85%), particularly in western Bahia, where 94% of the populations were resistant. Resistance levels ranged from low (<10-fold) to moderate (between 10- and 40-fold) with more serious instances occurring in western Bahia. This results in lower chlorantraniliprole efficacy among these populations, with a higher risk of control failure and exhibiting spatial dependence. These findings invite attention to problems with the intensive use of this relatively recent insecticide and demand management attention, but they suggest that local, farm-based management efforts are likely to be the most effective actions against resistance problems in this pest species.
新热带咖啡潜叶蛾，Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842)，是新热带美洲无遮荫咖啡种植园的关键害虫物种，特别是在巴西，那里的害虫管理涉及密集使用杀虫剂。因此，经常出现对常规杀虫剂产生抗性的问题，而最近开发的杀虫剂分子，如双酰胺杀虫剂，有失效的风险。因此，对巴西巴伊亚州高产量咖啡种植区的双酰胺杀虫剂溴氰虫酰胺进行了抗药性调查。还评估了这种杀虫剂控制失效的可能性。评估了昆虫采样点之间的空间相关性，并进行了溴氰虫酰胺抗性和控制失效风险的空间映射。对溴氰虫酰胺具有抗性的种群频率很高（40 个种群中有 34 个，即 85%），特别是在巴伊亚州西部，其中 94%的种群具有抗性。抗性水平从低（<10 倍）到中等（10-40 倍）不等，在巴伊亚州西部更为严重。这导致这些种群中溴氰虫酰胺的功效降低，控制失效的风险更高，并表现出空间依赖性。这些发现引起了对这种相对较新杀虫剂密集使用的问题的关注，并需要管理部门的关注，但它们表明，针对这种害虫的抗药性问题，基于当地农场的管理措施可能是最有效的行动。
