In the protection of heathers against shoot dieback caused by Pestalotiopsis sydowiana, highest percentage effectiveness 92.6% to 100% was found on plants sprayed 12 times every 7 days with active substances: iprodione, pyraclostrobin + boscalid and trifloxystrobin biotechnical agents containing: microcrystalline chitosan extract from grapefruit seed pulp, an efficacy 76.9% 100%. The substances...

Abstract Currently, Pestalotiopsis leaf fall disease caused by the fungus microspora is commonly found in Indonesian rubber plantations. The defoliation period usually occurs for 1 month as a response to drought during dry season. However, due this disease, gradually with an earlier fall. Leaf can cause decrease number of plant canopy which affects area index and latex production. Therefore, st...