Indian Journal of Plant Protection
  • Year: 2007
  • Volume: 35
  • Issue: 2

Soil Amendments with Different Forms of Nitrogen and Potassium Fertilizers on Stem Rot and Late Leaf Spot of Groundnut*

  • Author:
  • M Johnson, P Narayan Reddy, D Rajaram Reddy1
  • Total Page Count: 5
  • Page Number: 304 to 308

$Administrative Office, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad-500 030, Andhra Pradesh, India

Department of Plant Pathology, College of Agriculture, Rajendranagar, Hyderabad-500 030, Andhra Pradesh, India

* Part of PhD thesis submitted by the senior author to Acharya N.G. Ranga Agricultural University, Rajendranagar, Hyderabad- 500 030, Andhra Pradesh, India. Present Address: Agricultural Research Station, Anantapur - 500 001, Andhra Pradesh, India.

Abstract

Field experiments were conducted during Kharif 2002 and 2003 on the use of soil amendments and different forms of nitrogen and potassium fertilizers and their effect on the incidence of stem rot of groundnut caused by S. rolfsii with 13 treatments. Application of calcium ammonium nitrate (CAN) resulted in minimum stem rot incidence (29.8%) followed by recommended dose of NPK (31.3), gypsum as basal (31.6), gypsum application -2 times (31.9) and recommended dose of NPK + Zn (32.2)as against control (78.2). In addition, the same treatment gave increased pod yield (1781 kg ha-1) and haulm yield (2294 kg ha-1) besides decreasing pods left over in soil (144 kg ha-1) and resulted in highest cost benefit ratio (CBR) of 1.46 than other treatments tested. The next best treatments were gypsum as basal application with CBR of 1.25 and recommended dose of NPK + Zn with CBR of 1.24.

Keywords

Groundnut, Sclerotium rolfsii, soil amendments, potassium fertilizers, in vivo