Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam

Abstract. Nguyen HU, Nguyen TH, Chau NQK, Le VV, Tran VH. 2020. Biology, morphology and damage of the lesser coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam. Biodiversitas 21: 4686-4694. The lesser coconut weevil, Diocalandra frumenti, is an emerging pest of coco...

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Autores principales:	Ung Nguyen, THI-HIEN NGUYEN, NGUYEN-QUOC-KHANH CHAU, VAN-VANG LE, VAN-HAI TRAN
Formato:	article
Lenguaje:	EN
Publicado:	MBI & UNS Solo 2020
Materias:	coconut weevil, diocalandra frumenti, genetic diversity, insect pest, mekong delta Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/55975142ef234975a48ec7c9d2c8281d
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spelling	oai:doaj.org-article:55975142ef234975a48ec7c9d2c8281d2021-11-22T00:51:09ZBiology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam1412-033X2085-472210.13057/biodiv/d211030https://doaj.org/article/55975142ef234975a48ec7c9d2c8281d2020-09-01T00:00:00Zhttps://smujo.id/biodiv/article/view/6421https://doaj.org/toc/1412-033Xhttps://doaj.org/toc/2085-4722Abstract. Nguyen HU, Nguyen TH, Chau NQK, Le VV, Tran VH. 2020. Biology, morphology and damage of the lesser coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam. Biodiversitas 21: 4686-4694. The lesser coconut weevil, Diocalandra frumenti, is an emerging pest of coconut trees in Vietnam. To help develop control options for D. frumenti, this study investigated its morphological and biological characteristics, and quantified damage levels on coconut trees. Results from the study showed that attack by D. frumenti on coconut trees is correlated with characteristic damage symptoms (e.g., oozing sap) on all maturity stages of coconut fruits throughout the year (24.7% infestation), with higher damage levels on young fruits (57.6%). Results also showed that infestation levels on trees (58.9%), coconut bunches (19.4%), and fruits (7.77%) varied greatly. Adults have four different morphologies, but genetic study showed that they are all one species. The life cycle from egg to adult averaged 167± 34.3 days. The average development time for eggs, larvae, female pupae, male pupae, male adults, and female adults was 5.62 ± 0.62, 142.3 ± 34.3, 9.79 ± 0.86, 10.2 ± 1.26, 81.5 ± 34.7, and 81.8 ± 37.2 days, respectively. In conclusion, D. frumenti is an important pest in coconut trees with significant fluctuations in the duration of its development stages, and variation in shape, color, and size of the eggs, larvae, pupae, and adults. They can attack any coconut orchard and have harmful impacts on coconut trees, coconut bunches, and fruits throughout the year.Ung NguyenTHI-HIEN NGUYENNGUYEN-QUOC-KHANH CHAUVAN-VANG LEVAN-HAI TRANMBI & UNS Soloarticlecoconut weevil, diocalandra frumenti, genetic diversity, insect pest, mekong deltaBiology (General)QH301-705.5ENBiodiversitas, Vol 21, Iss 10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	coconut weevil, diocalandra frumenti, genetic diversity, insect pest, mekong delta Biology (General) QH301-705.5
spellingShingle	coconut weevil, diocalandra frumenti, genetic diversity, insect pest, mekong delta Biology (General) QH301-705.5 Ung Nguyen THI-HIEN NGUYEN NGUYEN-QUOC-KHANH CHAU VAN-VANG LE VAN-HAI TRAN Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam
description	Abstract. Nguyen HU, Nguyen TH, Chau NQK, Le VV, Tran VH. 2020. Biology, morphology and damage of the lesser coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam. Biodiversitas 21: 4686-4694. The lesser coconut weevil, Diocalandra frumenti, is an emerging pest of coconut trees in Vietnam. To help develop control options for D. frumenti, this study investigated its morphological and biological characteristics, and quantified damage levels on coconut trees. Results from the study showed that attack by D. frumenti on coconut trees is correlated with characteristic damage symptoms (e.g., oozing sap) on all maturity stages of coconut fruits throughout the year (24.7% infestation), with higher damage levels on young fruits (57.6%). Results also showed that infestation levels on trees (58.9%), coconut bunches (19.4%), and fruits (7.77%) varied greatly. Adults have four different morphologies, but genetic study showed that they are all one species. The life cycle from egg to adult averaged 167± 34.3 days. The average development time for eggs, larvae, female pupae, male pupae, male adults, and female adults was 5.62 ± 0.62, 142.3 ± 34.3, 9.79 ± 0.86, 10.2 ± 1.26, 81.5 ± 34.7, and 81.8 ± 37.2 days, respectively. In conclusion, D. frumenti is an important pest in coconut trees with significant fluctuations in the duration of its development stages, and variation in shape, color, and size of the eggs, larvae, pupae, and adults. They can attack any coconut orchard and have harmful impacts on coconut trees, coconut bunches, and fruits throughout the year.
format	article
author	Ung Nguyen THI-HIEN NGUYEN NGUYEN-QUOC-KHANH CHAU VAN-VANG LE VAN-HAI TRAN
author_facet	Ung Nguyen THI-HIEN NGUYEN NGUYEN-QUOC-KHANH CHAU VAN-VANG LE VAN-HAI TRAN
author_sort	Ung Nguyen
title	Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam
title_short	Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam
title_full	Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam
title_fullStr	Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam
title_full_unstemmed	Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam
title_sort	biology, morphology and damage of the lesser coconut weevil, diocalandra frumenti (coleoptera: curculionidae) in southern vietnam
publisher	MBI & UNS Solo
publishDate	2020
url	https://doaj.org/article/55975142ef234975a48ec7c9d2c8281d
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Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam

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