NDLI: Distribution of Aceria guerreronis and Neoseiulus baraki among and within coconut bunches in northeast Brazil

Content Provider	Springer Nature Link
Author	Galvão, Andréia S. Gondim, Mael G. C. Moraes, Gilberto J. Melo, José W. S.
Copyright Year	2011
Abstract	Aceria guerreronis Keifer (Acari: Eriophyidae) is considered a major pest of coconut in many countries in the Americas, Africa and parts of Asia. Neoseiulus baraki Athias-Henriot (Acari: Phytoseiidae) is one of the predatory mites most commonly found in association with A. guerreronis in parts of northeast Brazil. The objective of this work was to study the distribution of A. guerreronis and N. baraki among and within coconut bunches. The hypothesis was tested that A. guerreronis and N. baraki are homogenously distributed over the fruits in a bunch, independent of the fruits’ age and position. Five collections of bunches, each corresponding to leaves 12–16 from apex (about 2–6 month-old), were conducted in each of three fields in northeastern Brazil, from February to October, 2007. A total of 1,986 fruits were examined. The number of mites, the percentage of fruits hosting them and the level of damage caused by A. guerreronis were evaluated. The highest density of A. guerreronis was observed on fruits of bunch 4 whereas the highest density of N. baraki was observed on bunch 5. Considering all fruits together, no significant differences were observed between densities of either A. guerreronis or N. baraki among the basal, median and apical thirds of the bunches. In younger bunches, fruits of the apical region tend to have lower densities of both mites than fruits of the basal region. This pattern, in association with a similar pattern for the percentage of fruits hosting N. baraki, suggests that the predator initially reaches the basal bunch region, from where it moves to the apical region. The results of the present study suggest that the pest population reduction in bunches older than bunch 4 could be due to (1) an effect of the predator, (2) reduction of the proportion of undamaged tissues amenable to attack, and/or (3) less favorable characteristics of the fruits to attack by A. guerreronis, as indicated by their increasing lignin content as they get older.
Starting Page	373
Ending Page	384
Page Count	12
File Format	PDF
ISSN	01688162
Journal	Experimental & Applied Acarology
Volume Number	54
Issue Number	4
e-ISSN	15729702
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-04-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coconut mite Cocos nucifera Biological control Ecology Predator Lignin Animal Ecology Entomology Animal Systematics/Taxonomy/Biogeography Life Sciences Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Ecology Medicine Insect Science

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Rearing of coconut mite Aceria guerreronis and the predatory mite Neoseiulus baraki in the laboratory

Population dynamics of Aceria guerreronis (Acari: Eriophyidae) and its predatory mite, Neoseiulus baraki (Acari: Phytoseiidae) in two coconut growing areas in Sri Lanka

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Distribution of Aceria guerreronis and Neoseiulus baraki among and within coconut bunches in northeast Brazil.

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Distribution of Aceria guerreronis and Neoseiulus baraki among and within coconut bunches in northeast Brazil

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