Informatics Publishing Limited

S. D. Sawant ¹, Indu S. Sawant ¹, Dinesh Shetty ¹, Manisha Shinde ¹, Sagar Jade ¹, Monali Waghmare ¹

Affiliations
1 National Research Centre for Grapes, Manjri Farm Post, Pune-Solapur Road, Pune 412 307, Maharashtra, IN

Abstract

Field experiments were conducted during the vegetative season of April-October 2008 and 2009 and fruiting season of October-April 2008-09 and 2009-10, to study the efficacy of Milastin K, a formulation containing Bacillus subtilis (KTBS), for the control of powdery mildew on grapes. Five to six sprays of Milastin K @ 1.0 ml l^-1 (1.0 l ha^-1), from 30-119 days after pruning at 7-22 days interval (depending on weather based disease risk) could effectively control powdery mildew on leaves and bunches in grapes and increase yield. The untreated control recorded PDI in the range of 4.00-82.13 during different seasons, Milastin K treatment significantly reduced PDI to 1.62-20.69. Under low to moderate disease pressure conditions, the efficacy of Milastin K in controlling powdery mildew was on par with sulphur 80 WG @ 2.0g l^-1. Under high disease pressure condition, Milastin K was not so effective when used alone, but was effective when used in integration with fungicide sprays. Harvestable yield of 4.55 kg per vine was recorded in Milastin K while there was nil yield in untreated control. There was no phytotoxic effect of Milastin K on vines when it was sprayed at a dose up to 2.0 ml l^-1.

Keywords

Grapes, Erysiphe necator, Uncinula necator, Vitis vinifera, Thompson Seedless, Harvestable Yield, Sulphur, Flusilazole.

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S. D. Sawant ¹, Indu S. Sawant ¹, Kaushik Banerjee ¹, Dinesh Shetty ¹, Monali Waghmare ¹, G. Kalbhor ¹, Shweta Patil ¹, Manjusha Jadhav ¹

Affiliations
1 National Research Centre for Grapes, Pune-412307, IN

Abstract

Bio-efficacy of Aureofungin-sol, an antifungal antibiotic, for control of downy mildew and powdery mildew of grape was evaluated during October 2008 - April 2009 fruiting season in vineyards at three locations in Maharashtra. Four to nine sprays of Aureofungin-sol, @ 0.108, 0.163 and 0.217 g/l, starting from 12-16 days to 46-75 days after fruit pruning gave good control of downy mildew on leaves and bunches, and increased harvestable yield over the Control. Similarly, four sprays of Aureofungin-sol @ 0.108 g/l at 11 to 20 days' interval at 65 days after pruning provided complete control of powdery mildew on leaves and bunches. No residue of Aureofungin-sol was found in harvest samples above the limit of detection (0.1 mg/kg).

Keywords

Plasmopara viticola, Uncinula necator, Sharad Seedless, Tas-A-Ganesh, Harvestable Yield, (Cymoxanil+Mancozeb) 72WP, Azoxystrobin 23SC.

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