Effects of fungic treatments in the diseases control of tomato (Lycopersicum esculentum l.) during the rainy season. a case study of Nkolo/ Mvuazi (Dr.Congo)

Tomato (Lycopersicum esculentum L.) is one of the crops most widespread throughout the world, but it is very sensitive to the attacks of the cryptogamic diseases due to the excess of moisture of ground. The use of the synthetic pesticides is an effective means to control the diseases which fight this crop in order to avoid significant losses of yield fruits. This work was led in Nkolo (Kongo Central province) in Democratic Republic of Congo, in order to identify the better fungicides used by the peasants face the extent of the diseases which reigns in the medium, and to determine their best frequency of pulverization. Led according to the experimental device in Split stud design with 3 repetitions, two factors selected to know the type of fungicide (principal factor) and the frequency of pulverization (secondary factor) were retained for the experimentation covering of 4,81 ares of area.. The results show that: • The diameter of the fruits was not influence by various fungicides and frequencies of pulverization, • he number of fruits produced by plant was a function either of the growth of plant, or of the time of harvest, • The mixture of fungicides Callomil plus + Ivory 80 had given the highest rotted fruit yield, • The majorities of fungicides are generally under or high proportioned by the truck farmers. All fungicides had statistically expressed a good performance by taking account of the output and the incidence and severity of the mildew, although the highest yield was obtained with Fongizeb fungicide, • The frequency of pulverization once after two weeks had proven to be the most favourable from an economic standpoint moment compared to the frequency of pulverization after one week and that after the rain.