Adarkwah, C.

Büttner, C.

Obeng-Ofori, D.

Reichmuth, C.

Schöller, M.

English

JKI Open Journal Systems (Julius Kühn-Institut)

10th International Working Conference on Stored Product Protection Julius-Kühn-Archiv, 425, 2010  607 Bio-rational control of red flour beetle Tribolium castaneum (Herbst) in stored wheat with Calneem® oil derived from neem seeds Adarkwah, C.*1,2, Obeng-Ofori, D.3, Büttner, C.1, Reichmuth, C.2, Schöller, M.#2 1 Humboldt University of Berlin, Institute for Horticultural Sciences, Section Phytomedicine, Königin-Luise-Str. 19, D-14195 Berlin, Germany. Email: lesadark@yahoo.com 2 Federal Research Centre for Cultivated Plants – Julius Kühn - Institut, Institute for Ecological Chemistry, Plant Analysis and Stored Product Protection, Königin-Luise-Str. 19, D-14195 Berlin, Germany 3 University of Ghana, Department of Crop Science, School of Agriculture, College of Agriculture & Consumer Sciences, Legon, P.O. Box 68, Accra, Ghana * Corresponding author # Presenting author DOI: 10.5073/jka.2010.425.167.505 Abstract The red flour beetle, Tribolium castaneum (Herbst) (Coleloptera: Tenebrionidae) is one of the most serious secondary pests that feeds on a wide range of durable stored products including cereals, cereal products and other high value produce such as cocoa beans and dried fruits. Toxicity and protectant potential of Calneem® oil (derived from the seeds of the neem tree Azadirachata indica (A. Juss)) to T. castaneum were evaluated in stored cracked wheat in the laboratory using contact toxicity, grain treatment, persistency, progeny emergence and repellency assays. Calneem® oil is a biopesticide produced, registered and marketed in Ghana by AQUA AGRIC Community Projects (AACP), Tema, Accra. Calneem® contains about 0.3% azadirachtin as its major active ingredient. The Calneem® was applied at six concentrations (0.1, 0.2, 0.5, 1.0, 2.0 and 3.0%). The oil was emulsified with water using 0.07% soap. Different doses of Calneem® oil were toxic and highly repellent to T. castaneum with an overall repellency in the range of 52-88%. The highest concentration of 3.0% of Calneem® oil killed at least 90% of the beetles within 72 h on grain and 88% on filter paper. Beetle mortality was dose-dependent. The development of eggs to adults on cracked wheat was significantly (P<0.05) inhibited by Calneem® oil treatments. The effectiveness of Calneem® oil was significantly reduced by the length of storage after application.The results obtained suggest good potential for the practical use of Calneem® oil as a grain protectant for stored-product pest control. The use of plant materials such as neem oil may be a safe, cost-effective method of grain preservation against pest infestation among poor subsistent farmers who store small amounts of grain. Keywords: Tribolium castaneum, Azadirachta indica, Cereals, Repellency, Contact toxicity   

Bio-rational control of red flour beetle Tribolium castaneum (Herbst) in stored wheat with Calneem® oil derived from neem seeds

https://ojs.openagrar.de/index.php/JKA/article/download/560/1272

Bio-rational control of red flour beetle Tribolium castaneum (Herbst) in stored wheat with Calneem® oil derived from neem seeds

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