Control of groundnut kalahasti malady (Tylenchorhynchus brevilineatus) through organic and inorganic soil amendments
2000
Naidu, P.H. | Mosas, G.J. | Sitaramaiah, K. (Acharya N G Ranga Agricultural University, Tirupati (India). Regional Agricultural Research Station)
Amendment of Kalahasti malady (Tylenchorhynchus brevilineatus Williams) infested soil with organic manures viz., poultry manure (50 q ha-1), farmyard manure (100 q ha-1) and saw dust (25 q ha-1) was found effective in reducing the population of T. brevilineatus and disease severity and in increasing groundnut pod yield over non-amended control plots. Neem green leaves at 25 q ha-1 could reduce only nematode population but could not increase groundnut pod yield. Highest degree of nematode control (33.5%) and highest increase in pod yield (50.3%) were obtained in poultry manure amendment (50 q ha-1) followed by neem cake (10 q ha-1) with 30.3 per cent decrease in nematode population and 42 per cent increase in pod yield. Farmyard manure (100 q ha-1) was found second best in the reduction of nematode population and disease severity and also in the increase of pod yield. The increase in yield was related to the decrease in nematode population. Application of poultry manure is highly economical with benefit cost ratio of 8.7 followed by farmyard manure with 3.6.
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