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<p>Alternative management strategies of <i>Sitona lineatus</i> L. are essential because chemical control is often ineffective against the soil-dwelling larvae. This field study investigated the relationship between pea leaf weevil damage and morphochemical traits across pea accessions to evaluate susceptibility via Fisher’s LSD test (<i>p</i> &lt; 0.05). The absolute growth rate, leaf area, nodulation, root parameters, and root nitrogen and phosphorus content significantly influenced pea leaf weevil preferences. Less susceptible accessions (L 123-5, L 123-7-11, and L 7/02-1-2) exhibited accelerated growth rates and longer roots. Conversely, the highly susceptible accessions (L 130 − 1, L 128-1, L 92/12, and L 125-5) exhibited significantly higher density of <i>S. lineatus</i> and more severe leaf and nodule damage. These susceptibility traits were further characterized by elevated nitrogen and phosphorus levels, shorter root systems, and expanded leaf areas. Interactions between various plant traits significantly influenced nodule damage. Phosphorus had the most substantial positive impact, whereas root length and growth rate exerted the strongest negative effect. Understanding the mechanisms underlying host-insect interactions facilitates the development of resistant cultivars. Such approaches reduce reliance on synthetic pesticides and promote sustainable crop production.</p>

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Influence of morphochemical traits on the susceptibility of field pea (Pisum sativum L.) accessions to Sitona lineatus L

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Ivelina Nikolova

摘要

Alternative management strategies of Sitona lineatus L. are essential because chemical control is often ineffective against the soil-dwelling larvae. This field study investigated the relationship between pea leaf weevil damage and morphochemical traits across pea accessions to evaluate susceptibility via Fisher’s LSD test (p < 0.05). The absolute growth rate, leaf area, nodulation, root parameters, and root nitrogen and phosphorus content significantly influenced pea leaf weevil preferences. Less susceptible accessions (L 123-5, L 123-7-11, and L 7/02-1-2) exhibited accelerated growth rates and longer roots. Conversely, the highly susceptible accessions (L 130 − 1, L 128-1, L 92/12, and L 125-5) exhibited significantly higher density of S. lineatus and more severe leaf and nodule damage. These susceptibility traits were further characterized by elevated nitrogen and phosphorus levels, shorter root systems, and expanded leaf areas. Interactions between various plant traits significantly influenced nodule damage. Phosphorus had the most substantial positive impact, whereas root length and growth rate exerted the strongest negative effect. Understanding the mechanisms underlying host-insect interactions facilitates the development of resistant cultivars. Such approaches reduce reliance on synthetic pesticides and promote sustainable crop production.