Research Regarding the Simultaneous Control of the Pathogens on Tomatoes Crops under High Plastic Tunnels

Abstract

In Romania the most important pathogens on tomatoes crops are Alternaria porri f.sp. solani, Botrytis cinerea, Fulvia fulva, Phytophthora infestans and Erysiphe sp. During period of vegetation, the attack of mentioned pathogens are frequently overlapping. For simultaneously control of pathogenswere used some combination with different active substances (chlorothalonil 500g/l, iprodione 500 g/l, fenhexamid 500 g/l, thiophanate methyl 500g/l, metiram 80%, dimethomorph 9%, mancozeb 60%, difenoconazole 250 g/l , fenamidone 75g/l, propamocarb HCL 375 g/l. The best results for controlling Alternaria porri f.sp. solani, Botrytis cinerea and Fulvia fulva are metiram 80% 0.2% + thiophanate methyl 500g/l 0.14% with 93.5% efficacy. In the untreated check the degree of attack was 78.6% (44.3% A.solani, 7.0% B.cinerea and 27.3% F. Fulva). For controlling Phytophthora infestans, Erysiphe sp. and Fulvia fulva (fenamidone 75g/l + propamocarb HCL 375 g/l)Â Â Â 0.2% +Â difenoconazole 250 g/l 0.05% with 94.5% efficacy. In the untreated check the degree of attack is 81.2% (38.4% P. infestans, 27.4% Erysiphe sp. , 15.4% F. fulva).

Keywords

• tomatoes, plastic tunnels, pathogens control