The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa

In the artificial introduction of the black cocoa ant Dolichoderus thoracicus (Smith) for cont rolling mirid damage in cocoa in Malaysia, initial establishment of introduced ants were often good but the effect was frequently not sustained. This under scored the need for augmentation of populatio...

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主要作者: Ho, Cheng Tuck
格式: Thesis
語言:English
English
出版: 1991
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在線閱讀:http://psasir.upm.edu.my/id/eprint/10300/1/FP_1991_10_A.pdf
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spelling my-upm-ir.103002011-03-22T00:42:40Z The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa 1991 Ho, Cheng Tuck In the artificial introduction of the black cocoa ant Dolichoderus thoracicus (Smith) for cont rolling mirid damage in cocoa in Malaysia, initial establishment of introduced ants were often good but the effect was frequently not sustained. This under scored the need for augmentation of populations of both the ant and its mutualistic mealybug Cataenococcus hispidus (Morrison). Honeydew of C. hispidus was demonstrated to be the main and preferred source of food of Q. thoracicus. This emphasises the need for mealybug establishment prior to ant introduction for success in establishment of the latter. Transport of C. hispidus by Q. thoracicus was established. Transport was the cumulative effect of random occasions of nymphs being carried in the mandibles of worker ants in the general direction of the ant's trails. Di rect spread of C. hispidus was effected by crawlers. Crawlers were most stimulated to do this when mother colonies were stressed, particularly through the dessication of host substrate. Dolichoderus - Mealybugs - Case studies 1991 Thesis http://psasir.upm.edu.my/id/eprint/10300/ http://psasir.upm.edu.my/id/eprint/10300/1/FP_1991_10_A.pdf application/pdf en public masters Universiti Pertanian Malaysia Dolichoderus - Mealybugs - Case studies Faculty of Agriculture English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic Dolichoderus - Mealybugs - Case studies


spellingShingle Dolichoderus - Mealybugs - Case studies


Ho, Cheng Tuck
The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa
description In the artificial introduction of the black cocoa ant Dolichoderus thoracicus (Smith) for cont rolling mirid damage in cocoa in Malaysia, initial establishment of introduced ants were often good but the effect was frequently not sustained. This under scored the need for augmentation of populations of both the ant and its mutualistic mealybug Cataenococcus hispidus (Morrison). Honeydew of C. hispidus was demonstrated to be the main and preferred source of food of Q. thoracicus. This emphasises the need for mealybug establishment prior to ant introduction for success in establishment of the latter. Transport of C. hispidus by Q. thoracicus was established. Transport was the cumulative effect of random occasions of nymphs being carried in the mandibles of worker ants in the general direction of the ant's trails. Di rect spread of C. hispidus was effected by crawlers. Crawlers were most stimulated to do this when mother colonies were stressed, particularly through the dessication of host substrate.
format Thesis
qualification_level Master's degree
author Ho, Cheng Tuck
author_facet Ho, Cheng Tuck
author_sort Ho, Cheng Tuck
title The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa
title_short The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa
title_full The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa
title_fullStr The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa
title_full_unstemmed The Importance of Mealybugs and Colony Compatibility in Augmentation of Dolichoderus Thoracicus (Smith) (Hymenoptera: Formicidae) Populations in Cocoa
title_sort importance of mealybugs and colony compatibility in augmentation of dolichoderus thoracicus (smith) (hymenoptera: formicidae) populations in cocoa
granting_institution Universiti Pertanian Malaysia
granting_department Faculty of Agriculture
publishDate 1991
url http://psasir.upm.edu.my/id/eprint/10300/1/FP_1991_10_A.pdf
_version_ 1747811091299172352