Vol. 10 (2) : March-April 2019 issue
Green Farming Vol. 10 (2) : 226-229 ; March-April, 2019
Evaluation of fungicides in the management of powdery mildew (Phyllactinia corylea) on Oak (Quercus serrata) tree
NINGTHOUJAM TIKEN SINGHa1, HARJEET SINGHb2* and MUTUM SHYAMKESHO SINGHc3
aMuga Silkworm Seed Organization, Central Silk Board, Pailapool - 788 098, Cachar (Assam),
bSericulture Development Department, Poonch - 185 101 (Jammu and Kashmir),
cDepartment of Life Science, Manipur University, Canchipur, Imphal – 795 003 (Manipur)
Designation : 1Scientist, 2FA *(hskhajuria@gmail.com), 3Professor
Subject : Plant Pathology, Nematology and Virology, Mushroom Cultivation
Paper No. : P-7536
Total Pages : 4
Received : 31 January 2019
Revised accepted : 27 February 2019
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Citation :
NINGTHOUJAM TIKEN SINGH, HARJEET SINGH and MUTUM SHYAMKESHO SINGH. 2019. Evaluation of fungicides in the management of powdery mildew (Phyllactinia corylea) on Oak (Quercus serrata) tree. Green Farming Vol. 10 (2) : 226-229 ; March-April, 2019
ABSTRACT
Different concentrations of 7 fresh fungicide solutions were tested to assess their efficacy on the powdery mildew (Phyllactinia corylea) disease development on oak tree (Quercus serrata) leaf under field condition. The efficacy of fungicides was confirmed under in vitro conditions on the conidial germination. All concentrations of the fungicides were found to have inhibitory effect in disease development. Foliar spray with fungicide solutions on oak leave significantly reduced the per cent disease index (PDI). The higher dose shows better result. Among the fungicides Iprobenfos (Kitazin 48 EC) and Tricyclazole (Beam 75 WP) were controlling the disease, giving 81.82 and 85.12% after the second spray with 0.3% concentration. Beam (Tricyclazole) at 0.3% was most effective in reducing the spore germination also recording 82.01% over the control. Mancozeb (Dhanuka M-45) was found to be least effective in reducing the PDI of powdery mildew. The other fungicides also significantly inhibited the spore germination and Mancozeb was found to be least effective in their inhibitory action. All concentrations were found to have inhibitory effect on conidial germination.
Key words :
Conidial germination, Fungicides, Oak leaf, Phyllactinia corylea, Powdery mildew, Quercus serrata.
