ISHS Acta Horticulturae 505: VII International Symposium on Rubus and Ribes
ROLE OF STYLE INFECTIONS WITH BOTRYTIS CINEREA ON HYBRID BERRY ROT (Rubus spp.) |
| Authors: | M. Walter, K.S.H. Boyd-Wilson, J.H. Perry |
| Keywords: | Boysenberry, grey mould, New Zealand, drupelet, latent |
| Abstract:
Botrytis cinerea causes substantial fruit losses in Boysenberry (Rubus hybrid) in New Zealand when conditions favour disease development. Flower infection in spring is considered to result in berry rot at harvest. Style infection as a pathway leading to berry rot at harvest was investigated during the 1995/96 and 1996/97 growing seasons in field and potted vine experiments. Susceptibility of styles to B. cinerea infection and the survival of B. cinerea in styles and/or drupelets was examined. B. cinerea conidia were dusted at regular intervals onto fully opened flowers and/or developing drupelets throughout both growing seasons. Culturing from surface sterilised plant tissues was used to confirm B. cinerea infections. Latent B. cinerea berry infection was assessed by incubation of surface sterilised berries under high humidity. Styles and drupelets remained susceptible to B. cinerea infection from flowering to harvest. Berry rot at harvest was highly correlated with style and drupelet infection. | |
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