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Low-Dose Insecticide Combinations for Colorado Potato Beetle Control

Author

Listed:
  • Renata Bažok

    (Department of Agricultural Zoology, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, 10000 Zagreb, Croatia)

  • Jamie O’Keeffe

    (Department of Agricultural Zoology, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, 10000 Zagreb, Croatia)

  • Ivana Jurada

    (Department of Agricultural Zoology, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, 10000 Zagreb, Croatia)

  • Zrinka Drmić

    (Centre for Plant Protection, Croatian Agency for Agriculture and Food, Vinkovačka cesta 63c, 31000 Osijek, Croatia)

  • Martina Kadoić Balaško

    (Department of Agricultural Zoology, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, 10000 Zagreb, Croatia)

  • Maja Čačija

    (Department of Agricultural Zoology, Faculty of Agriculture, University of Zagreb, Svetošimunska cesta 25, 10000 Zagreb, Croatia)

Abstract

Colorado potato beetle (CPB) is the most notorious and problematic insect defoliator pest of potato. It is well known for its ability to develop resistance to chemical insecticides, so novel treatment methods must be developed. A possible solution is the application of newer groups of insecticides (biotechnical and biological insecticides) which are more selective and to which resistance has not yet been recorded. This work investigated the use of ecologically acceptable insecticide treatments: azadirachtin, spinosad and spinetoram, and their combinations against CPB larvae in laboratory and field conditions. Reduced dosing and combinational treatments were used to determine if effective protection against CPB could be achieved while also improving economic results. Our results from laboratory trials showed that combinations of low-dose azadirachtin (25%) and low-dose spinetoram (5%) are suitable for use in CPB integrated pest management. The results of the field trial showed that the use of 50% reduced dosage of spinosad and spinetoram resulted in high efficacy (89–99%) and can be recommended as a treatment method that provides effective control of CPB, improved economic results, and a positive environmental impact. Based on the advantages that these treatments offer compared to chemical insecticides, further work is recommended to determine if these combinational treatments used in other dosages or in combinations with some other ecologically acceptable insecticides can provide satisfactory control of CPB.

Suggested Citation

  • Renata Bažok & Jamie O’Keeffe & Ivana Jurada & Zrinka Drmić & Martina Kadoić Balaško & Maja Čačija, 2021. "Low-Dose Insecticide Combinations for Colorado Potato Beetle Control," Agriculture, MDPI, vol. 11(12), pages 1-14, November.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:12:p:1181-:d:685759
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    References listed on IDEAS

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    1. Bastian Göldel & Darija Lemic & Renata Bažok, 2020. "Alternatives to Synthetic Insecticides in the Control of the Colorado Potato Beetle ( Leptinotarsa decemlineata Say) and Their Environmental Benefits," Agriculture, MDPI, vol. 10(12), pages 1-27, December.
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