The survey carrying on the struggle against the bacterial wilt of the potato has been led between November 2012 and February 2013 on the Penap variety in the perspective to defend Solanum tuberosum against the aggressions of Pseudomonas solanacearum and to valorize thus potentialities them bactericidal and insecticide that offer Tephrosia vogelii and Nicotiana tabacum. To the results gotten it has been established that the use of the excerpts of T. vogelii about 200g leaves in one liter of water on the potatoes during one month stop not only the propagation of the illness but also increase the vigor and is important to prolong the longevity of the plantations reached. As for the use of N. tabacum in the treatment of the bacterial withering of the only potato, its mechanical effect against the vector has been found. The association of two plants however was a factor to high risk for the potatoes.

As part of the management of weeds common bean crop (Phaseolus vulgaris L.), a study of the effects of two methods of weed control on grain yield of 3 varieties of common bean was conducted at the research station INERA Kipopo. The experimental design was a split-plot design with 3 replications and 3 blocks, as the main factor varieties and secondary modes weeding, observations were: the number of days to flowering; number of days to pod; number of days for the filling of pods; number of pods per plant, number of seeds per pod; weight of 100 seeds; the yield of the crop. The results obtained revealed that only the variety is distinguished from APN130 Kapira D6Kenya and share his great influence on the number of pods per plant; number of seeds; 100 seed weight and yield. No interaction of two factors was observed in wholes settings, however weeding methods have influenced the performance of which the highest was obtained by manual weeding with APN 130, two manual weedings are sufficient for the mastery of weeds. For cons, the dose of 3 l / ha basagran did not provide good control of weeds which 7 were resistant. However the combination of basagran to another active ingredient would be desirable to ensure better management.