Control of oidium on rubber tree and it´s interference on the mite calacarus heveae feres population

Abstract

The rubber tree, Hevea brasiliensis (Willd. ex. Adr. de Juss.) Müell. Arg., can be attacked by the Oidium heveae Steinm fungus and the Calacarus heveae Feres mite, which cause leaf fall in areas of the São Paulo State. This study had as objective the evaluation of the effect of the systemic fungicide fenarimol, in the fungus control and its interference on C. heveae population. Four ways of application were compared: one application during the new leaves growth period (August); one application in January; two applications: one in the new leaves growth period and one in March; four applications during the cycle of the culture. The fungicide reduced the disease symptoms in all the treatments; however mite resurgence was detected. Considering the integrated management of O. heveae and C. heveae the best result was obtained by using two applications of the fungicide.