Impact of Nitrogen Fertilization on Myzus Persicae (Hemiptera: Aphidae) and Bactericera Cockerelli (Hemiptera: Triozidae) Populations in Potato

Abstract

Nitrogen fertilization plays a critical role in the growth and productivity of potato crops, yet its impact on pest populations, particularly Myzus persicae and Bactericera cockerelli, remains underexplored. This study investigates the effects of different nitrogen sources and dosages on the population dynamics of these pests in potato cultivation. Conducted in a greenhouse, the experiment involved three nitrogen sources—ammonium nitrate, calcium nitrate, and ammonium sulfate—applied at three dosages (0.5X, 1X, and 2X). Results indicate that nitrogen fertilization significantly influences M. persicae populations, with intermediate nitrogen levels increasing aphid density and higher levels reducing it. Ammonium nitrate and calcium nitrate particularly favored aphid proliferation. In contrast, B. cockerelli populations exhibited marginal responses to nitrogen fertilization, suggesting different nutritional preferences and interactions. This study highlights the need for balanced nitrogen management in pest control strategies, advocating for integrated approaches that consider fertilizer type and application levels to mitigate pest issues while sustaining crop yields. These findings provide valuable insights for optimizing nutrient management in potato agriculture and enhancing pest control measures.