Effect of Six Fungicides against Botrytis Cinerea on Protected Cultivation Tomato

Six fungicides are selected and used to control Botrytis Cinerea on tomato under protected cultivation. The fungicides include Fludioxonil, BoscaLid, Pyrimethanil (ISO, BSI), Diethofencarb, Carbendazim, Procymidone and Thiophanate-methyl. These Chemicals were sprayed three times and once a week before or in the beginning of disease development. The results show that all the six fungicides have different negative effect on the growing of Botrytis Cinerea. Two of them, 50% BoscaLid (750 g/hm2) and 50% Fludioxonil (750 g/hm2), have significantly inhibited more than 77% of disease development in leaves and fruits resulting in almost 4 times increase of yield compared with control. Other two Chemicals, 40% Pyrimethanil (1550 g/hm2) and 60% Diethofencarb-Carbendazim (1550 g/hm2) also reduced more than 49.35% of disease development in leaves and fruits resulting in 3 time increase of yield compared with control. The last two fungicides 50% Procymidone (1800 g/hm2) and 70% Thiophanate-methyl (2580 g/hm2) have less effect on Botrytis Cinerea.