Journal Of Applied Horticulture ISSN: 0972-1045


Pradeep Kumar; Singh, H K

Department of Horticulture, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad - 224 229 (U.P.), India.

Key words: bitertanol, chemical control, copper oxychloride, crop quality, crop yield, cultivars, fruit drop, fruits, fungal diseases, fungicides, mancozeb, phytotoxicity, plant disease control, plant diseases, plant pathogenic fungi, plant pathogens, tridemorph

Journal of Applied Horticulture, 2000, volume 2, issue 2, pages 111-112.

Abstract: Field experiments were conducted in 1995-96, 1996-97, and 1997-98 at Faizabad, Uttar Pradesh, India, with aonla (Emblica officinalis [Phyllanthus emblica]) cultivars NA-7 and Kanchan to determine the effective fungicides against aonla rust (caused by Ravenelia emblicae). Pooled data revealed that all tested fungicides, except tridemorph, reduced the rust percent disease index (PDI; 0.69-16.83 and 1.17-14.04) over the control (25.45 and 17.65) in NA-7 and Kanchan, respectively. Indofil M-45 (mancozeb; 0.3%) applied thrice during September-October was most effective (0.69 and 1.17 PDI; 97.37 and 93.22 percent disease control or PDC), followed by Baycor (bitertanol; 3.22 and 6.34 PDI; 84.79 and 67.46 PDC) and Blitox-50 (copper oxychloride; 3.55 and 7.13 PDI; 84.69 and 62.22 PDC). Improvement in fruit size was also recorded for these fungicides. Tridemorph showed toxic effects by causing heavy premature fruit drop. NA-7 was most sensitive as there were less healthy fruits left for recording the yield.

Journal of Applied Horticulture