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Korarima (Aframomum corrorima (Braun) P.C.M. Jansen) production is declining mainly due to destruction of the plant’s natural habitat. A survey was conducted
in the three major korarima growing administrative zones, Gamo Gofa, Debub Omo and Kaffa in southern Ethiopia to assess indigenous
production practices, wealth status, farm based biodiversity and household characteristics using participatory rural appraisal
(PRA) and semi-structured questionnaires. The wealth is unevenly distributed among households and not significantly different
for korarima growers and non-korarima growers. Farmers acknowledged that shortage of shade trees; low yield and lack of improved
varieties had contributed to decrease in production area (PA). A total of three distinct named korarima landraces were recorded,
with a range from one to three on individual farms implying low farm based biodiversity. More households grew enset (Ensete ventricosum (Welw.) Cheesman) in Gamo Gofa and Kaffa while maize (Zea mays L.) was grown by nearly all households in Debub Omo. Only a few households grew korarima. Most of the household characteristics
significantly affected the PA of korarima. The correlation coefficients indicated that the relationship of household characteristics
were significant. Findings of this study suggest that the maintenance of shade trees on the main farm field is the main requirement
for korarima production. 相似文献
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Donald A Ukeh Michael A Birkett Toby JA Bruce Eunice J Allan John A Pickett A Jennifer Mordue 《Pest management science》2010,66(1):44-50
BACKGROUND: Four‐arm olfactometer bioassays were conducted to assess the behavioural responses of the adult maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), to harvested seeds of host plants, i.e. white maize, yellow maize (Zea mays L.) and winter wheat (Triticum aestivum L.) (Poaceae), and non‐host plant materials, i.e. alligator pepper, Aframomum melegueta (Rosk) K. Schum (Zingiberaceae), rhizomes of ginger, Zingiber officinale (Roscoe) (Zingiberaceae), and West African black pepper, Piper guineense Thonn and Schum (Piperaceae). Additional bioassays with host plant volatiles were conducted in the presence of three doses of non‐host plant materials. RESULTS: Both sexes of the weevil showed strong attraction to maize and wheat seed volatiles, but were significantly repelled (P < 0.001) by odours from A. melegueta, Z. officinale and P. guineense. Furthermore, S. zeamais avoided maize and wheat seeds presented in combination with the non‐host plant material at 10% (w/w) and 33% (w/w) levels. CONCLUSIONS: A. melegueta, Z. officinale and P. guineense have the potential for use in the protection of stored grains by resource‐poor farmers with local access to these plants. Copyright © 2009 Society of Chemical Industry 相似文献
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