Plata-Rueda Angelica, Quintero Hughes Antonio, Serrão José Eduardo, Martínez Luis Carlos
Department de Entomology, Federal University of Viçosa, Viçosa, Minas Gerais 36570-000, Brazil.
Department of Crop Protection, Monterrey Oil Palm Plantation, Puerto Wilches, Santander 687-061, Colombia.
Insects. 2020 May 15;11(5):310. doi: 10.3390/insects11050310.
In the present work, we evaluated the insecticidal activity of () strains on as an alternative for the organophosphate insecticide use in oil palm plantations in the Americas. The toxic effects of four -strains (HD-1 var. , SA-12 var. , ABTS-1857 var. , and GC-91 var. ) were evaluated against caterpillars for toxicity, survival, anti-feeding, and mortality in field-controlled conditions. The -strains, ABTS-1857 var. (LC = 0.84 mg mL), GC-91 var. (LC = 1.13 mg mL), and HD-1 var. (LC = 1.25 mg mL), were the most toxic to . The caterpillar survival was 99% without exposure to -strains, and decreased to 52-23% in insects treated with the LC and 10-1% in insects exposed to LC after 48 h. Furthermore, -strains decreased significantly the consumption of oil palm leaves of 3 h after exposure. Mortality of caterpillars caused by -strains had similar lethal effects in the laboratory and in field conditions. Our data suggest that -strains have insecticidal activity against and, therefore, have potential applications in oil palm pest management schemes.
在本研究中，我们评估了（）菌株对（）的杀虫活性，作为美洲油棕种植园中使用有机磷杀虫剂的替代方法。评估了四种（）菌株（HD-1变种（）、SA-12变种（）、ABTS-1857变种（）和GC-91变种（））在田间控制条件下对（）毛虫的毒性、存活、拒食和致死作用。ABTS-1857变种（）（LC₅₀ = 0.84毫克/毫升）、GC-91变种（）（LC₅₀ = 1.13毫克/毫升）和HD-1变种（）（LC₅₀ = 1.25毫克/毫升）这几种菌株对（）毒性最大。在未接触（）菌株的情况下，毛虫存活率为99%，在接触LC₅₀剂量处理的昆虫中，48小时后存活率降至52% - 23%，在接触LC₁₀剂量的昆虫中存活率降至10% - 1%。此外，（）菌株在接触后3小时显著降低了（）对油棕叶的消耗量。（）菌株导致的（）毛虫死亡率在实验室和田间条件下具有相似的致死效果。我们的数据表明，（）菌株对（）具有杀虫活性，因此在油棕害虫管理方案中具有潜在应用价值。
