Effect of botanicals against dieback and gummosis (Botryodiplodia theobromae Pat) of mango.
Dieback and gummosis incited by Botryodiplodia theobromae Pat has become a major constraint in cultivation of mango in India inflicting significant yield losses. A study was undertaken to evaluate the efficacy of nine plant extracts viz Ghrit Kumari (Aloe vera) fleshy leaves, lemongrass (Cymbopogon citrates) leaves, lantana (Lontana camara) leaves, eucalyptus (Eucalyptus hybrida) leaves, mint (Mentha piperata) leaves, parthenium (Parthenium hysterophorus) leaves, garlic (Allium sativum) cloves, onion (Allium cepa) bulbs and hemp (Cannabis saliva) leaves having anti-microbial properties. The plants were collected and evaluated in vitro against B theobromae using poisoned food technique. Among these all Cannabis sp suppressed the mycelial growth and showed the minimum mean diametric growth of the fungus with 71.55 mm. It was followed by garlic with 74.33 mm of diametric growth. Hence study opened further opportunities for advanced investigations of botanicals against the dieback and gummosis of mango.