Evaluation of botanicals in the management of buckeye rot of tomato

Seven botanicals in the form of powder and crude extract were evaluated in vitro against Phytophthora nicotianae var parasitica causing buckeye rot of tomato. Aqueous extract of marigold leaves completely inhibited the growth of the pathogen followed by turmeric, black pepper, garlic powder which inhibited the growth of the pathogen to the tune of 50.34, 31.93 and 11.09%, respectively. Cent per cent inhibition was recorded at all concentrations when crude extract of Eupatorium adenophorum (kali basuti/snake root) was tested against the pathogen without sterilization while the crude extract from Melia azedarach resulted in 100 per cent inhibition at 1.0 per cent and higher concentrations only.