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Banana weevil, Cosmopolites sordidus (Germar), ovipositional preferences, timing of attack and larval survivorship in a mixed cultivar trial in Uganda

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Title Banana weevil, Cosmopolites sordidus (Germar), ovipositional preferences, timing of attack and larval survivorship in a mixed cultivar trial in Uganda
 
Creator Abera, A.
Kyamanywa, S.
Karamura, E.B.
 
Subject banana weevils
kayinja
east african
cooking bananas
cultivars
ovipositional
timing of attack
larval survivorship
 
Description Host location, acceptance and larval success were studied in a mixed cultivar trial consisting of three East African cooking bananas, two East African beer banana and Kayinja (an exotic cultivar used for beer making). Weevil damage to the endemic cultivars was 5 to 25 times higher than that of Kayinja. Capture of weevils in pseudostem traps at the base of banana mats was highest for Kayinja, while egg density on Kayinja was similar to that of four endemic cultivars. Therefore, host location and acceptance do not appear to be factors in host plant resistance. In contrast, larval survivorship indices were 10 to 23 times higher in endemic cultivars than in Kayinja suggesting that larval success may be an important factor in resistance to banana weevils. Timing of attack was similar among cultivars. Oviposition occurred throughout the banana cycle with egg density increasing with plant age. These data provide a possible explanation of differences in weevil attack found among banana cultivars in Uganda.
 
Date 2000
2018-05-17T09:02:54Z
2018-05-17T09:02:54Z
 
Type Journal Article
 
Identifier Abera, A., Kyamanaywa, S. & Karamura, E. (1996, October). Banana weevil, Cosmopolites sordidus (Germar), ovipositional preferences, timing of attack and larval survivorship in a mixed cultivar trial in Uganda. Acta Horticulturae, 540, 487-495.
0567-7572
https://hdl.handle.net/10568/92623
 
Language en
 
Rights Limited Access