Evaluating Founding Landraces of Maize Population PI 674097 for Resistance to Leaf-Feeding Spodoptera frugiperda

IF 0.3 4区农林科学 Q4 ENTOMOLOGY

Southwestern Entomologist Pub Date : 2023-07-14 DOI:10.3958/059.048.0207

C. Abel, U. Frei, S. Woolfolk

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引用次数: 0

Abstract

Abstract. Fall armyworm, Spodopera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), a maize (Zea mays L.) pest native to the Americas, is a recent invasive insect of Africa, Asia, and Oceania. Resistant to several insecticide classes and toxins of Bt-maize, the insect damages maize by feeding on leaf, tassel, and ear tissues. Using native resistance in maize with existing tactics could improve control. The objective of the study was to evaluate resistance to leaf-feeding fall armyworm in maize population PI 674097 and founding landraces used to develop the germplasm. Plants grown in the field and artificially infested at the seven- or eight-leaf stage were visually scored for leaf-feeding damage at 7- and 14-days post infestation. All scores for NSL 283507, PI 498583, PI 583912, and PI 674097 were less (i.e., more resistant) than those of susceptible check GEMN-0131. In 2022, 14-day scores for PI 674097 were not different from those of resistant check Mp708 (3.6 ± 0.5 and 2.7 ± 0.5, respectively). PI 674097 was variable in response to lead feeding by fall armyworm, with individual plants having a range of 14-day scores from 2 (resistant) to 7 (susceptible) across both years of testing. The variability might be useful when selecting greater resistance to the pest.

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玉米种群PI 674097对食叶夜蛾抗性评价

摘要秋粘虫(Spodopera frugiperda, J.E. Smith)(鳞翅目:夜蛾科)是一种原产于美洲的玉米害虫，是最近入侵非洲、亚洲和大洋洲的一种昆虫。这种昆虫对bt玉米的几种杀虫剂和毒素具有抗性，通过捕食玉米叶片、穗子和穗组织来破坏玉米。利用玉米的本地抗性和现有的策略可以改善控制。本研究的目的是评价玉米群体PI 674097对叶食性秋粘虫的抗性，并建立用于开发该种质资源的地方品种。在田间种植和人工侵染的七叶期或八叶期植株，在侵染后7天和14天视觉评分。NSL 283507、PI 498583、PI 583912和PI 674097的所有得分均低于敏感检查gem -0131。2022年，PI 674097的14天得分与耐药检查Mp708的14天得分无显著差异(分别为3.6±0.5和2.7±0.5)。PI 674097对秋粘虫取食铅的反应是可变的，在两年的测试中，单个植株的14天得分范围从2(抗性)到7(易感)。在选择对害虫具有更强抵抗力的品种时，这种可变性可能是有用的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Southwestern Entomologist 生物-昆虫学

CiteScore

0.60

自引率

25.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Manuscripts submitted for consideration for publication in the Southwestern Entomologist should report results of entomological research in the southwestern United States or Mexico or should report results of studies on entomological species, relevant to this region, which may be done elsewhere, provided such results are geographically applicable. Manuscripts that report results of routine laboratory or field experiments for which the primary purpose is gathering baseline data or those that report results of a continuous evaluation program such as preliminary pesticide evaluation experiments, species lists with no supporting biological data, or preliminary plant resistance evaluations are not acceptable. However, reports of experiments with insecticides, acaricides, and microbials are acceptable if they are comprehensive and include data related to economics, resistance, toxicology, or other broad subject areas. Bibliographies will not be published in Southwestern Entomologist.