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Kanda, Ghana

Osei K.,Crops Research Institute | Addico R.,West Africa Fair Fruit | Nafeo A.,West Africa Fair Fruit | Edu-Kwarteng A.,Crops Research Institute | And 3 more authors.
African Journal of Agricultural Research | Year: 2011

Plant parasitic nematodes significantly hinder food production particularly in the developing world where peasant farmers have little knowledge of these pests. Currently, synthetic pesticides which are highly detrimental to man and the environment are the principal means of nematode control. However, plant products might provide a sustainable control option as nematicidal properties have been identified in many higher plants. An in vitro experiment involving five organic waste extracts; citrus waste, cocoa bean testa, compost, poultry manure and oil palm bunch waste were therefore evaluated for their hatching inhibitory potential to the southern root-knot nematode, Meloidogyne incognita eggs. Three concentration levels (w/v) that is 4, 8 and 10% of cold aqueous extracts of the organic waste compounds were filtered into 9 cm Petri dishes and infested with 100 eggs each. Hatching of eggs was monitored over a three time period; 24, 48 and 72 h after infestation of the eggs into the cold aqueous extracts of the five candidates in Petri dishes. The best result was obtained with citrus waste extract in which 5 eggs hatched while 73 eggs hatched in the distilled water (the control treatment) representing a hatching reduction of 93% at the highest time and concentration of 72 h and 10% respectively. © 2011 Academic Journals. Source

Osei K.,CSIR Crops Research Institute | Agyemang A.,CSIR Crops Research Institute | Asante J.S.,CSIR Crops Research Institute | Moss R.,West Africa Fair Fruit | Nafeo A.,West Africa Fair Fruit
Acta Horticulturae | Year: 2011

A factorial experiment was conducted in 2009 at Komenda, a prominent pineapple growing area in the Central region of Ghana. The purpose was to introduce pineapple farmers in the catchment area to organic system of farming. Three organic amendments; ground cocoa testa, ground citrus waste and compost were investigated for their nematode suppression and yield improvement potential in pineapple production. Two of the candidates, cocoa testa and citrus waste demonstrated significant nematode suppression activity. With cocoa testa Helicotylenchus multicintus, Meloidogyne spp., Pratylenchus brachyurus, Rotylenchulus reniformis and Tylenchulus semipenetrans, respectively, were reduced by 83, 75, 85, 87 and 77% relative to the control treatment during the first six months of application of treatments. However, at harvest of the main crop 12 months after application of treatments, citrus waste was the most effective candidate with reductions of 324, 159, 534, 534, 538 and 312% reduction in H. multicintus, Hoplolaimus spp., Meloidogyne spp., P. brachyurus, R. reniformis and T. semipenetrans, respectively, over the control treatment. Yield of the main pineapple crop from citrus waste treated plots was 49 t/ha, which was 26% higher than the 39 t/ha obtained for the control treatment. The use of organic amendments is comparatively cheaper (money and health wise) than the use of synthetic agrochemicals. Source

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