Response of walnut aphid populations to increasing foliar nitrogen content

摘要: An understanding of how fertilizer input affects pest populations and, consequently, the need for pesticide use would allow development more effective integrated management strategies. 2 The present study addressed response walnut aphid Chromaphis juglandicola (Kaltenbach) (Hemiptera: Aphididae) to different levels nitrogen application seedlings and relationship between density chlorophyll content index (CCI), a non-invasive measure foliar nitrogen, mature trees in commercial orchards. 3 Although added significantly increased soluble content, CCI : phosphorus ratios foliage seedlings, there was no effect on population growth. Similarly, field. 4 A neutral suggests that growth potted is limited by factors other than such as nutrients, amino acid composition or defensive compounds. Consequently, appears unlikely effectively contribute control