Lepidopteran Stem Borer Species Abundance and Associated Damages on Irrigated Kilombero Low Land Rice Ecosystem in Tanzania

Bonaventure January, Gration M. Rwegasi, T. Tefera
{"title":"Lepidopteran Stem Borer Species Abundance and Associated Damages on Irrigated Kilombero Low Land Rice Ecosystem in Tanzania","authors":"Bonaventure January, Gration M. Rwegasi, T. Tefera","doi":"10.3923/JE.2018.28.35","DOIUrl":null,"url":null,"abstract":"Background: Rice stem borers are among the most biotic stresses of economic importance in agriculture. Little was known about stem borer problem in Tanzania prior to this study. Understanding stem borer abundance and damages would help to design appropriate stem borer integrated pest management strategy in rice. This study was aimed at investigating rice stem borer’s species abundance and their associated damages in irrigated lowland rice ecosystem in Kilombero Tanzania. Materials and Methods: Field survey study on rice stem borer abundance and incidences were conducted in farmer’s fields on selected rice varieties at varied growth stages in Kilombero district under irrigated rice schemes. Adult moths were trapped by light traps and incidences assessed based on dead hearts and white head in 1 m2 quadrat in field stratum sampled at random. Results: Results indicated the presence of Chilo sp. and Sesamia calamistis in all study areas with Chilo sp., as most abundant species (79.24-92.05%) followed by S. calamist (7.97-20.77%). The abundance of these two stem borer species and their associated damage incidences varied significantly between rice varieties and rice growth stages (p<0.05). The insecticides sprayed on different rice varieties had neither effect on species abundance nor on incidences of stem borers under the study area suggesting that the sprayed insecticides did not control the pest. Conclusion: This study therefore concluded that control measures particularly IPM is highly recommended short of which the control of stem borer will in future be unachievable.","PeriodicalId":15744,"journal":{"name":"Journal of Entomology","volume":"30 5","pages":"28-35"},"PeriodicalIF":0.0000,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Entomology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3923/JE.2018.28.35","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3

Abstract

Background: Rice stem borers are among the most biotic stresses of economic importance in agriculture. Little was known about stem borer problem in Tanzania prior to this study. Understanding stem borer abundance and damages would help to design appropriate stem borer integrated pest management strategy in rice. This study was aimed at investigating rice stem borer’s species abundance and their associated damages in irrigated lowland rice ecosystem in Kilombero Tanzania. Materials and Methods: Field survey study on rice stem borer abundance and incidences were conducted in farmer’s fields on selected rice varieties at varied growth stages in Kilombero district under irrigated rice schemes. Adult moths were trapped by light traps and incidences assessed based on dead hearts and white head in 1 m2 quadrat in field stratum sampled at random. Results: Results indicated the presence of Chilo sp. and Sesamia calamistis in all study areas with Chilo sp., as most abundant species (79.24-92.05%) followed by S. calamist (7.97-20.77%). The abundance of these two stem borer species and their associated damage incidences varied significantly between rice varieties and rice growth stages (p<0.05). The insecticides sprayed on different rice varieties had neither effect on species abundance nor on incidences of stem borers under the study area suggesting that the sprayed insecticides did not control the pest. Conclusion: This study therefore concluded that control measures particularly IPM is highly recommended short of which the control of stem borer will in future be unachievable.
坦桑尼亚Kilombero灌溉低地水稻生态系统鳞翅目茎螟虫物种丰度及其危害
背景:水稻茎蛀虫是农业中最重要的生物胁迫之一。在这项研究之前,人们对坦桑尼亚的茎螟虫问题知之甚少。了解螟虫的丰度及其危害,有助于制定适宜的水稻螟虫综合防治策略。本研究旨在调查坦桑尼亚基隆贝罗灌溉低地水稻生态系统中水稻茎螟虫的种类丰度及其相关危害。材料与方法:对Kilombero地区不同生育期水稻品种在农户田间进行了水稻茎螟虫丰度和发病率的实地调查研究。采用灯诱法捕获成蛾,在野外随机抽取1 m2样方的地层中以死心和白头为指标评估成蛾发生率。结果:所有研究区均存在赤腹虫和麻麻虫,其中赤腹虫数量最多(79.24 ~ 92.05%),其次为赤腹虫(7.97 ~ 20.77%)。两种螟虫的丰度及其危害发生率在不同水稻品种和生育期差异显著(p<0.05)。不同水稻品种喷施的药剂对研究区域内螟虫的种类丰度和发病率均无显著影响,说明喷施的药剂对螟虫没有防治作用。结论:建议采取防治措施,特别是IPM防治措施,否则今后对茎螟虫的防治将难以实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信