Department of Entomology, Cornell University, New York State Agricultural Experiment Station, Geneva, NY 14456, USA.
J Econ Entomol. 2009 Dec;102(6):2183-91. doi: 10.1603/029.102.0622.
Management of green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae), in bell pepper, Capsicum annuum L., was explored through a combination of plant growth-promoting rhizobacteria (PGPR) and endemic biological control in New York in 2006 and 2007. We hypothesized that by using PGPR-treated peppers 1) M. persicae infestations would be reduced via induced resistance, 2) natural enemies would be lured to plants through the elicitation of volatile organic compounds, and 3) yield amount and quality would be improved. Pepper seed was planted in soil containing the PGPR formulation BioYield or untreated soil. Plants were transplanted to field plots and then treated with an insecticide regimen designed to remove or conserve populations of natural enemies. Apterous aphids and natural enemies were counted weekly on plants and pepper fruit were harvested, graded and weighed three times. PGPR did not directly or indirectly reduce aphid densities in either year. In 2006, there were more natural enemies in PGPR-treated plots than untreated ones, but this was probably a density-dependent response to aphid densities rather than a response of natural enemies to volatiles from PGPR-treated plants. For the first harvest date in 2006, yield of all fruit grades, especially the premium Fancy Grade, was 1.7-2.3 times greater in PGPR-treated plots than in untreated plots. However, no differences in yield were observed for the other two harvest dates or overall yield in 2006; no differences in yield among treatments were detected in 2007. Our results suggest that PGPR will not significantly impact M. persicae infestations or natural enemy populations but could enhance yield and quality of pepper fruit in some years.
2006 年和 2007 年，在美国纽约，通过使用植物促生根际细菌（PGPR）和地方生物防治相结合的方法，探索了甜椒（Capsicum annuum L.）中绿桃蚜（Myzus persicae （Sulzer））的管理方法。我们假设，通过使用 PGPR 处理过的甜椒：1）通过诱导抗性减少 M. persicae 的侵扰；2）通过挥发有机化合物的诱导，引诱天敌到植物上；3）提高产量和质量。将甜椒种子种植在含有 PGPR 制剂 BioYield 的土壤或未处理的土壤中。将植物移植到田间试验地，然后用杀虫剂处理，旨在去除或保护天敌种群。每周在植物上计数无翅蚜虫和天敌的数量，并对甜椒果实进行 3 次收获、分级和称重。在这两年中，PGPR 既没有直接也没有间接降低蚜虫的密度。2006 年，PGPR 处理过的地块中天敌的数量比未处理的地块多，但这可能是对蚜虫密度的密度依赖反应，而不是天敌对 PGPR 处理过的植物挥发物的反应。对于 2006 年的第一个收获日期，所有果实等级的产量，特别是优质的 fancy 级，PGPR 处理过的地块比未处理的地块高出 1.7-2.3 倍。然而，在 2006 年的其他两个收获日期或总产量中，没有观察到产量的差异；在 2007 年，没有检测到处理之间产量的差异。我们的研究结果表明，PGPR 不会显著影响 M. persicae 的侵扰或天敌的数量，但在某些年份可能会提高甜椒果实的产量和质量。
