Effectiveness of water absorbents, FYM application and sowing direction indowny mildew reduction in pearl millet under arid environment
2002
D. SINGH, G.K. GUPTA and
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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