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József, TAKÁCS – Miklós, NÁDASY – Péter, BALOGH

Control of larvae of the western corn rootworm /WCR/ ( Diabrotica virgifera virgifera LeConte , 1868 ). József, TAKÁCS – Miklós, NÁDASY – Péter, BALOGH University of Veszprém, Georgikon Faculty of Agriculture, Institute of Plant Protection, Department of Agricultural Entomology.

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József, TAKÁCS – Miklós, NÁDASY – Péter, BALOGH

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  1. Control of larvae of the western corn rootworm /WCR/(Diabrotica virgifera virgifera LeConte, 1868) József, TAKÁCS –Miklós, NÁDASY – Péter, BALOGH UniversityofVeszprém,GeorgikonFaculty of Agriculture, Institute of Plant Protection, Department of Agricultural Entomology

  2. Female adult Portorož, 2005 feb. 28. - march. 05.

  3. Damages on leaves and tassels Portorož, 2005 feb. 28. - march. 05.

  4. Damages on silk and ears Portorož, 2005 feb. 28. - march. 05.

  5. Larvae of WCR Portorož, 2005 feb. 28. - march. 05.

  6. Root damage and plant lodging Portorož, 2005 feb. 28. - march. 05.

  7. Life cycle of WCR Portorož, 2005 feb. 28. - march. 05.

  8. Biology of the pest Diabrotica • Overwinter in egg state (about 8 to 10 months in soil) • Prolonged hatching of eggs (longer than a month) • Three larval instars (Root damages under a two month period) • Oviposition from July to October Portorož, 2005 feb. 28. - march. 05.

  9. Problems of WCR • Continuous hatching of eggs • Problems of soil insecticides: High doses, risk of soil pollution Expensive Period of effectiveness • Problems of seed coating: Period of effectiveness (less than a month) • Need longer effectiveness period • No need soil pollution Portorož, 2005 feb. 28. - march. 05.

  10. MAVICELL pearl • Microporous build • Able to bind over triple dose of insecticide agents • Prolonged transmittance of the agents even under two months • 100 % cellulose • Disorganize under three months in soil Portorož, 2005 feb. 28. - march. 05.

  11. Porous body of MAVICELL pearl Large absorptive surface to bind chemical and biological agents Portorož, 2005 feb. 28. - march. 05.

  12. Greenhouse screening Test object: Tanymecus dilaticollis GILLENHAL Mortality: Over 95 % even after the 60th day. Portorož, 2005 feb. 28. - march. 05.

  13. Plough land applications Seeding machines: - Kuhn Planter Junior - Monosem NG Pus - JohnDeere Maxemerge Portorož, 2005 feb. 28. - march. 05.

  14. Problems of sowers • Monosem: Its micro-granule adaptor not able to sow the large pearls (necessary to change the adaptor for sowing micro-granules) • JohnDeere: Its not able to sow the complete dose of the pearl (only half dose) Portorož, 2005 feb. 28. - march. 05.

  15. Observations and dataprocessing • Inspection of regularity of sowing • Estimation of the number of early stage pests (Corn Weevils – Tanymecus dilaticollisGILLENHAL) • Measuring of larval damages with IOWA or Oleson-Tollefson scales • Estimation of lodging after growth of ears • Statistical analysis Portorož, 2005 feb. 28. - march. 05.

  16. Results of MAVICELL and differences between treatments Average damages in: Control: IOWA value 5 Soil treatment (Furadan): IOWA value 4 MAVICELL treatments: Under economical threshold (IOWA value 3,5) Portorož, 2005 feb. 28. - march. 05.

  17. Statistical analysis of damaging on roots after washing Portorož, 2005 feb. 28. - march. 05.

  18. Results • After three years of investigation we can say: MAVICELL is able to protect maize against WCR! • Are there any losses of quality of pearl or agents? Checking with greenhouse screening! • Costs of a hectare are much cheaper than the same with soil insecticides! • We need to find a reliable method or seeding-machine to sow the pearls under the rows of corn!!! Portorož, 2005 feb. 28. - march. 05.

  19. Thank you for your attention! Portorož, 2005 feb. 28. - march. 05.

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