Control of Didymella applanata in raspberry orchards using new organic fungicides during vegetacion

Abstract

Raspberry cane decay disease are the major problem in its production by reducing yield and lifetime of orchards. This disease cause a several disease-causing agents, and the most important is Didymella applanata, causal agent of raspberry spur blight. With regard to the biology of the pathogen fungicide use postharvest is not efficient enough because pat­hogen can infect raspberry far earlier. Therefore, the aim of this study is testing the efficacy of newer organic fungicides applied before and after the harvest raspberries and mutual comparison thereof on biological efficacy. The results show that the tested fungicides ex­hibited very high efficacy against D. apllanata on the raspberry leaves and the canes (from 83.0 - 96.5%).

Prouzrokovači 'kompleksa sušenja' maline predstavljaju najveći problem u njenoj proizvodnji smanjujući prinose i životni vek zasada. Ovaj kompleks sačinjen je od više prouzrokovača bolesti, a najznačajniji u tom kompleksu je Didymella applanata, prouzrokovač kestenaste pegavosti maline. S obzirom na biologiju patogena tretiranje biljaka tek nakon berbe nije dovoljno efikasno jer patogen u povoljnim uslovima može da zarazi malinu daleko ranije. Cilj rada je ispitivanje efikasnosti novijih organskih fungicida primenjenih pre i posle berbe maline kao i međusobno poređenje njihove biološke efikasnosti. Dobijeni rezultati pokazuju da su ispitivani fungicidi ispoljili veoma visoku efikasnost u suzbijanju D. applanata kako na listu tako i na izdancima maline (od 83.0 - 96.5%).