Plant Protect. Sci., 2011, 47(3):109-114 | DOI: 10.17221/71/2010-PPS
Ovicidal effects of thiacloprid, acetamiprid, lambda-cyhalothrin and alpha-cypermethrin on Bruchus pisorum L. (Coleoptera: Chrysomelidae) eggs
- 1 Department of Plant Protection, AGRITEC, Research, Breeding &
- Services Ltd., Šumperk, Czech Republic
- 2 Research Institute for Fodder Crops, Ltd., Troubsko, Czech Republic
- 3 Agricultural Research, Ltd., Troubsko, Czech Republic
The effects of two pyrethroid (lambda-cyhalothrin, alpha-cypermethrin) and two neonicotinoid (acetamiprid, thiacloprid) insecticides on B. pisorum L. eggs were compared under field conditions in the Czech Republic in 2005-2007. The main objective of the study was to find out what real effects can be expected from the available insecticides registered in Europe when applied at the time of the first egg occurrence on lower pods. In general, the rates of Bruchus pisorum egg (+ first instar larvae) survival were significantly lower with all the insecticides compared in the study, in each of the three years (2005, 2006, 2007). The tested insecticides showed some ovicidal effects and also some larvicidal effects. The tested pyrethroids (lambda-cyhalothrin, alpha-cypermethrin) showed somewhat higher effectiveness in comparison with the neonicotinoids (acetamiprid, thiacloprid). Alpha-cypermethrin was the most effective in all three years. In 2006 and in 2007 this insecticide significantly reduced the rates of egg survival in comparison with acetamiprid. In contrast, acetamiprid was the least effective insecticide in each of the three years.
Keywords: Bruchus pisorum; pea weevil; pyrethroids; neonicotinoids; ovicidal effects
Published: September 30, 2011 Show citation
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