Seasonal incidence, biology and management of fall army worm (Spodoptera frugiperda, J.E. Smith) on fodder maize

IF 0.8 4区农林科学 Q3 AGRONOMY

Range Management and Agroforestry Pub Date : 2023-12-20 DOI:10.59515/rma.2023.v44.i2.24

N. S. Kulkarni, M.C Keerth, B.G Shivakumar

引用次数: 0

Abstract

Seasonal incidence of fall army worm in maize at Dharwad indicated its occurrence both in and kharifrabi seasons The incidence was more during the season. Highest incidence of 50% was noticed during last . kharif week of August and second peak incidence of 30% was noticed during last week of December. Correlation between seasonal incidence of fall army worm and weather parameters indicated that there was a significant negative correlation with the rainfall (-0.60**) and morning humidity (-0.50*). Biology of fall army worm indicated that it completed its total life cycle in 31-44 days on maize comprising of six larval instar stages. Among the entomo-pathogens tested against the fall army worm,(2 x 10 cfu/g)Metarhizium (Nomuraea) rileyi 8 was found to be superior and it was at par with neem formulation (azadirachtin 3000 ppm) @ 5ml/l

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饲料玉米上秋季军团虫（Spodoptera frugiperda，J.E. Smith）的季节性发生率、生物学和管理

达尔瓦德（Dharwad）的玉米中秋虫的季节性发生率表明，秋季和冬季均有发生。8 月份的最后一周是秋收季节，发病率最高，达 50%；12 月份的最后一周是秋收季节的第二高峰期，发病率为 30%。秋绵虫季节性发病率与天气参数的相关性表明，秋绵虫与降雨量（-0.60**）和早晨湿度（-0.50*）呈显著负相关。秋安虫的生物学特性表明，它在玉米上的整个生命周期为 31-44 天，包括六个幼虫龄期。在针对秋绵虫进行的病原体测试中，发现 Metarhizium (Nomuraea) rileyi 8（2 x 10 cfu/g）的效果更好，与印楝素制剂（氮芥 3000 ppm）@ 5ml/l 的效果相当。

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

Range Management and Agroforestry AGRONOMY-

CiteScore

1.50

自引率

62.50%

发文量

审稿时长

>12 weeks

期刊介绍： The Society has been established with the following objectives: 1. To advance the cause of research activity in all aspects of rangelands and to encourage and promote the studies on rangeland, wasteland ecosystems and agroforestry. 2. To provide facilities for seminars and conferences to rangeland researchers, development workers and farmers and to encourage close cooperation with organizations having related aims and interests. 3. To disseminate the knowledge of scientific agriculture and technology for forage and rangeland production, improvement and management.