Pest Management in Horticultural Ecosystems

  • Year: 2015
  • Volume: 21
  • Issue: 2

Efficacy of bio-insecticides against thrips, Thrips tabaci Lindeman on onion crop

  • Author:
  • Maher Ahmed Moraiet1,, M. Shafiq Ansari1, Salman Ahmad2
  • Total Page Count: 7
  • DOI:
  • Page Number: 180 to 186

1Department of Plant Protection, Agriculture Research Station-Seiym, Agricultural Research and Extension authority, P. B.: 9041 Seiyun, Hadramout, Yemen

2Integral Institute of Agricultural Science and Technology, Integral University, Lucknow, India

Abstract

Field experiment was conducted to determine the effectiveness of five bio-insecticides against onion thrips, Thrips tabaci on two onion cultivars for two consecutive years (2011/12and 2012/13). Most of the tested bio-insecticides caused significant (P< 0.05) reduction of thrips compared to the control in all the observation dates except 7days after treatment in 2012. Interaction results showed that Lastraw has significantly (P<0.05) decreased the density of thrips and increased the yield of Onion White. Onion White gave higher benefit-cost ratio when treated with Lastraw (3.06:1) than azadirachtin 0.15% (2.60:1) in 2011/12.

Keywords

Bio-insecticide, onion, Thrips tabaci