Pheromone traps and climate variations influence populations of Sahlbergella singularis (Hemiptera: Miridae) and associated damage of cocoa in Cameroon

Author:

Mahot Hermine C12ORCID,Bagny-Beilhe Leïla34ORCID,Mahob Raymond J5,Begoudé Aimé-Didier B1,Fotso Kuate Apollin2ORCID,Membang Gertrude2,Ewane Nathalie2,Kemga Adolph2,Bilong Charles F B5,Hall David R6ORCID,Fiaboe Komi K M2ORCID,Hanna Rachid27ORCID

Affiliation:

1. Institute of Agricultural Research for Development (IRAD) , P.O. 2067, Yaoundé , Cameroon

2. International Institute of Tropical Agriculture (IITA) , BP 2008, Yaoundé-Messa , Cameroon

3. CIRAD, UMR PHIM , F-34398 Montpellier , France

4. PHIM, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD , 7 Montpellier , France

5. Faculty of Science, University of Yaoundé I , P.O. 812, Yaoundé , Cameroon

6. Natural Resources Institute, University of Greenwich at Medway , Kent , UK

7. Center for Tropical Research, Institute of the Environment and Sustainability, University of California, Los Angeles (UCLA) , Los Angeles, CA 90095 , USA

Abstract

Abstract Knowledge of insect pest ecology and biology is important for maximizing crop protection and reducing crop losses. Currently, we lack an efficient control program for the cocoa mirid Sahlbergella singularis Haglund (Hemiptera: Miridae), the principal insect pest of cocoa in West and Central Africa. A 2-yr study was conducted in 11 plantations across Ayos and Konye, two of the largest cocoa growing areas of Cameroon. We evaluated the effects of mirid sex pheromone and climatic variations on mirid population dynamics and their associated cocoa damage. Sex pheromone traps caught 1.5-fold higher mirids in Ayos than in Konye, with more overall counts in 2015 than in 2016. Cocoa pod counts were also significantly higher in 2015 than in 2016 and were negatively correlated with temperature and relative humidity. In both localities, mirid populations and associated cocoa pod damage were suppressed in plantations where sex pheromone traps were used. Damage incidence was positively correlated with mirid counts, confirming that the cocoa pod is the preferential site for mirid feeding and reproduction. As such, damage incidence could be used as proxy for comparative mirid population level due to the mirid’s cryptic habit. Of the recorded weather variables, only relative humidity was correlated (negatively) with damage severity. Our data on the relationships between damage caused by mirids and their population dynamics and sex pheromone trap catches suggest that an effective control strategy using mass trapping could be developed for mirid management in cocoa plantations.

Funder

Dutch Development Organization

German Corporation for International Cooperation

CGIAR CRP Humidtropics

Publisher

Oxford University Press (OUP)

Reference51 articles.

1. The cocoa mirid (Hemiptera: Miridae) problem: evidence to support new recommendations on the timing of insecticide application on cocoa in Ghana;Adu-Acheampong;Int J Trop Insect Sci,2014

2. Distribution et incidence de la mosaïque du concombre (CMV) dans des bananeraies industrielles au Sud-Est de la Côte d’Ivoire;Aka;Sci Nat,2009

3. Influence of the structure of cocoa agroforestry systems on the development of black pod disease in central region of Cameroon;Ambang;Am J Innov Res Appl Sci,2019

4. Feeding preference and morphometric of Sahlbergella singularis (Hemiptera: Miridae) on cocoa pods at different stages of physiological development;Anikwe;Acad J Entomol,2010

5. Monitoring of pest populations – an important element of integrated pest management of field crops;Arnaudov;J. Agric Sci Technol,2012

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3