Experimental Assessment Of Three Protocols Of Phytosanitary Treatment And The Effect Of Organic And Mineral Fertilization On Late Blight And Profitability Of Tomato (solanum Lycopersicum L.) In East Region Of Cameroon.

Tomato cultivation which is increasing in the East region of Cameroon because of the proximity of markets of neighboring countries is compromised by an old epidemic disease, late blight and by poor soils. To solve this problem, farmers usually use large quantities of pesticides and mineral fertilizations that could cause many environmental hazards. The objective of this study was to improve the productivity of tomato in this region through rational and integrated management of pesticides and fertilizers. Three protocols of phytosanitary treatments (P1, P2 and P3) associated with four fertilizations (F0, F1, F2 and F3) were developed to assess their effectiveness in the control of late blight and the profitability of tomato cultivation within a split plot experimental design where the main variables were the protocols of pesticides application and the types of fertilization. Mancozeb applied at 2 kg/ha associated with Azoxystrobin (1liter/ha) significantly reduced the severity of downy mildew as well as Mancozeb applied only at 2.5 kg/ha (P