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Publication Type
Book Chapter
UWI Author(s)
Author, Analytic
Wilson, Arlene; Mansingh, Ajai
Author Affiliation, Ana.
Natural Products Institute
Title, Analytic
Pesticidal potential of tropical plants VII: Susceptibility of the diamondback moth Plutella Xylostella L. and its parasitoid and two coffee pests to crude ethanol extracts of selected plants
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Author, Monographic
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Title, Monographic
Utilization of natural products in Developing Countries: Trends and needs edited by Ajai Mansingh, Ajai, Donald E Young, Donald E. , Trevor H.Yee, Rupija Delgoda, Dwight E. Robinson,Dwight E., Errol Y. Morrison, Henry I.Lowe.
Reprint Status
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Edition
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Place of Publication
Kingston, Jamaica
Publisher Name
The Natural Products Institute, University of the West Indies
Date of Publication
2002
Volume ID
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Issue ID
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Page(s)
253-60
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Abstract
The 48 hr. LD50 values for the third instar larvae of Plutella xylostella L., determined by the direct tropical application of the crude ethanol extracts of various plants (values w/v%, in parentheses) were: Azadirachta indica (5.8) > Artocarpus altilis (6.78) > Ervatamia divaricata (7.3) > Blighia sapida (8.45). LD50 values for the adult parasite of the cabbage moth, Oomyzus sokolowskii (Kurdj.), exposed in glass vials to the films of the extras for 48 hr., were 4.97, 6.78, 19.54 and 17.65 % for A. indica, A. altilis, B. sapida and E. divaricata, respectively. All the extracts, except that of E. divaricata repelled the parasite. The 24 hr. LD50 values of crude ethanol extracts of A. indica, B. sapida, E. divaricata, A. altilis and C. americana for the coffee berry borer, Hypothenemus hampei (Ferrari) sprayed under Potter's Tower were 1.07, 2.31,, 1.75, 0.38, 2.07 and 4.31 (w/v %) respectively; the LD50 values of the extracts of these plants for the coffee leafminer Perileucoptera coffeella (Guerin-Meneville) were 0.059, 3.177 and 3.436 (w/v %), respectively. In field investigations, extracts and formulations of A. indica were found to delay infestation by H. hampei.....
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