Effectiveness of water absorbents, FYM application and sowing direction indowny mildew reduction in pearl millet under arid environment
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Authors
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G.K. GUPTA and D. SINGH
Central Arid Zone Research Institute, Jodhpur 342 003
Keywords:
Water absorbents, FYM, sowing direction, Sclerospora graminicola, Pennisetum glaucumAbstract
Incorporation of the water absorbent compound Jalshakti at 20 g/8 kg soil significantly controlled primary incidence of Pennisetum glaucum downy mildew caused by Sclerospora graminicola in Rajasthan, India. Disease incidence reduction was 72.3% at 30 d after sowing (DAS) and 59.3% at 42 DAS. Flyash, silica gel and bentonite clay reduced disease incidence up to 30 DAS only. Lignite incorporation had no effect. Application of farmyard manure (FYM) at 5 ton/ha mixed with soil in the seed furrows reduced downy mildew by 81.5% at 42 DAS and 44.9% at 70 DAS. Crops sown in a NW-SE direction showed max. reduction (39.6%) in disease incidence at 70 DAS. Systemically infected plants were max. (19.1%) in N-S sown crops. Grain yields in EN-WS and NW-SE sown crops were similar to each other but higher than those in W-E and N-S. Crops sown in a NW-SE direction received max. solar radiation and had the highest soil temp. and wind speed with the lowest soil moisture and shade. Conditions in the N-S sown crop were the opposite.
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