MANAGEMENT OF Fusarium oxysorum f. sp. rosae USING METHAM SODIUM, DAZOMET AND BRASSICA BIOFUMIGANTS IN GREENHOUSE ROSE (Rosa spp.) PRODUCTION 

Oloo G

2011

ABSTRACT

Alternative strategies to manage Fusarium oxysorum f. sp. rosae in greenhouse grown rose plants were investigated at Egerton University, Department of Horticulture Research and Teaching Field in 2005 and 2006. The treatments tested included; Dazomet, metham sodium and brassica biofumigants (Brassica napus and Brassica juncea). Dazomet and metham sodium were applied at 83.3g/m2 and 0.12g/l to 1m2 rates, respectively. Brassica napus and Brassica juncea were uprooted at the initial flowering stage and chopped into small pieces separately. The chopped brassicas were applied to the respective plots at the rate of 2, 3 and 4 kg/m2. The results of this experiment showed that, Dazomet and metham sodium were effective in managing Fusarium oxysporum f.sp rosae. However their activity was quite inconsistent and short lived. Reinfestation occurred soon after field aeration. Brassica juncea at an application rate of 3 and 4 kg suppressed Fusarium oxysporum f.sp. rosae more than Brassica napus. Brassica juncea at 3 and 4 kg had a similar effect as dazomet and metham sodium in the management of Fusarium oxsporum f. sp. rosae. Although metham sodium was the most effective against Fusarium oxyporium, the Brassica biofumigants especially B. juncea at 3 kg offers a better alternative for the management of Fusarium oxysporum f.sp. rosae in greenhouse rose production. 

 

 

 

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