Efficacy of some plant extracts on Botrytis cinerea, the causal of gray mould rot of strawberry fruits

Document Type : Research articles

Authors

Agricultural Botany Department, Faculty of Agriculture, Menoufia University, Egypt

Abstract

For controlling B. cinerea using plant extracts in vitro, all tested plant extracts
concentrations were effective in inhibiting fungal growth in all experimental trials in
petri dishes. Galls and Cinnamon extracts were more effective in inhibiting B. cinerea
growth than the other plant extracts. in vivo experiments, all plant extracts with
different concentrations which applied as dipping treatment decreased disease
severity % (DS %) on wounded and unwounded strawberry fruits which inoculated
with B. cinerea when compared with control treatment. the tested concentrations of
Galls, Clove and cinnamon extracts were generally more effective than other
extracts in controlling strawberry fruit rot infection. There were no significant
differences between the four strawberry cultivars in disease index on the same level
of each plant extract concentration. In general, application with Galls and Clove
extracts on strawberry fruits either by spraying or dipping was effective in decreasing
DS % when compared with control of wounded or un-wounded fruits. Controlling B.
cinerea using Trichoderma spp. in vitro, T. harzianum (isolate 1), T. hamatum
(isolate 1) and T. hamatum (isolate 2) were the most effective bio-agents in reducing
the fungal growth. With regard to controlling strawberry fruit rot infection using
Trichoderma spp. culture filtrates and fungicides in vivo, spraying the wounded and
un-wounded strawberry fruits in or with three sterilized culture filtrates of three
Trichoderma isolates pre-inoculation with B. cinerea decreased the strawberry fruit
rot infection on the four-tested strawberry cultivars.

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