Effect of three commercial biopesticides of neem (Azadirachta indica) and Bacillus thuringiensis on legume pod borer (Maruca vitrata) (Lepidoptera: Crambidae) in Thailand

  • Prabhat KumarEmail author
  • Lu-Ying Zoe Huang
  • R. Srinivasan
Research Paper


Maruca vitrata Fabricius (legume pod borer, LPB), the most serious economic pest of legume crops in the tropics, is primarily controlled by chemical pesticide application with serious consequences for the ecosystem and human health. In this study various concentrations of three commercial biopesticides, NeemBaan, Bactospeine Bacillus thuringiensis (Bt) subsp. kurstaki) and Florbac® (Bt aizawai), were tested either in the field or laboratory or in both conditions. In the laboratory experiments, different concentrations of NeemBaan exhibited significant effects on the mortality of all the tested larval instars and a mortality rate of over 80% was recorded at a dose of 3000 ppm. Bactospeine® was found to be more effective against M. vitrata than Florbac®. Bactospeine applied at a lower dose of 500 ppm caused 100% mortality in the firstinstar and second-instar larvae; however, at the same dose, Florbac caused mortality of only 26.67% (first instar) and 20% (second instar). In the field experiments, a higher dose of NeemBaan (6000 ppm) significantly reduced pod damage to approximately 20% in both the first and second cropping seasons. In conclusion, neem- and Bt-based biopesticide products have insecticidal potential to be used in an integrated pest management strategy for controlling M. vitrata in Thailand.

Key words

Maruca vitrata biopesticides neem Bacillus thuringiensis 


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Copyright information

© ICIPE 2014

Authors and Affiliations

  • Prabhat Kumar
    • 1
    Email author
  • Lu-Ying Zoe Huang
    • 1
  • R. Srinivasan
    • 2
  1. 1.Asian Center of Innovation for Sustainable Agriculture Intensification (ACISAI), AITKhlong Lunag, PathumthaniThailand
  2. 2.AVRDC — The World Vegetable CenterShanhua, TainanTaiwan, ROC

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