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Organic Management of Buckeye Rot of Tomato Caused by Phytophthora Nocotianae Var Parasitica (Dastur) Waterhouse

CSK Himachal Pradesh Agricultural University Repository

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Relation http://hillagricrepository.co.in/825/
 
Title Organic Management of Buckeye Rot of Tomato Caused by Phytophthora Nocotianae Var Parasitica (Dastur) Waterhouse
 
Creator Krishan, Raj
 
Subject 635.642 Tomatoes
 
Description Present investigations on "Organic management of buckeye rot of tomato caused by Phytophthora nicotianae var parasitica (Dastur) Waterhouse."were conducted in the Department of Plant Pathology, CSKHPKV, Palampur during 2012-2014. P. nicotianae var parasitica was found to be associated with buckeye rot of tomato from all the locations in HP. PDA supported the best mycelial growth and sporangial formation of the pathogen. Out of 43 bacterial and fungal isolates from organic inputs and phyllosphere, one isolate KLCuB3 was most effective in the management of buckeye rot even if the fruits were injured before or after treatment. Complete inhibition of the pathogen growth was observed under in vitro conditions when organic inputs, crude extract of Eupatorium adenophorum, aqueous extract of marigold, urine of desi cow, pine oil were used. Linseed oil panchgavya formulation, was found superior and economical in the inhibition of the pathogen and disease management. Eupatorium, pine oil, panchgavya and DMA8 completely checked the disease whereas except sumona and T. viride, no commercial product completely managed the disease. As the fruit stage progressed, the susceptibility against the disease decreased. Three lines namely Ptom, BT18 and Palam Pride showed some level of resistance. No disease developed when soil was either sterilized or drenched with panchgavya, neemastra, jeevamrit, amritpani, ghaniri extract and akshwan. BTH enhanced resistance and delayed the appearance of the disease. Trichoderma koningii (DMA8) resulted in highest per cent inhibition. Six sprays of Eupatorium crude extract @ 0.2% at weekly intervals were found to be most effective in the management of buckeye rot followed by Trichoderma (DMA-8) and Ridomil 0.25%. Plastic mulch + soil treatment with DMA-8 proved more effective to manage the disease. Integration of seedling dip with pine oil with plastic mulch was not suitable as it reduced the plant population and increased the disease level.
 
Date 2014
 
Type Thesis
NonPeerReviewed
 
Format text
 
Language en
 
Identifier http://hillagricrepository.co.in/825/1/Rajkishan%20PhD%20P_P.pdf
Krishan, Raj (2014) Organic Management of Buckeye Rot of Tomato Caused by Phytophthora Nocotianae Var Parasitica (Dastur) Waterhouse. PhD thesis thesis, CSKHPKV Palampur.