Several Fusarium species have been associated with the disease and the project has confirmed F. lactis as the predominant type on UK nurseries. Differences in variety susceptibility have also been shown, with Pele (yellow) very susceptible and Ferrari (green) less so. The red variety Cupra was less susceptible than red Spider.
A comparison of air relative humidity and temperature between two nurseries on the Fiesta variety revealed that frequent prolonged periods of high relative humidity (85 per cent plus) produced a higher incidence of Fusarium rot, indicating that the disease may be favoured by greater occurrence of high humidity and condensation.
A replicated experiment in a commercial crop of Cupra peppers determined that sprays of approved products Amistar (azoxystrobin), Switch (cyprodinil + fludioxonil) and Serenade ASO (Bacillus subtilis) significantly reduced the incidence of Fusarium internal fruit rot.
Investigation of aborted fruit found Fusarium spp. in 48, 88, 84 and 100 per cent of samples collected in April, June, August and November respectively. The possible role of Fusarium spp. in fruit abortion may warrant investigation. The project continues until March 2014.
Horticultural Development Company
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