Ovicidal effects of thiacloprid, acetamiprid, lambda-cyhalothrin and alpha-cypermethrin on Bruchus pisorum L. (Coleoptera: Chrysomelidae) eggs

Abstract

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.

Effects of faba bean (Vicia faba) varieties on the development of Bruchus rufimanus

“…However, egg monitoring on pods is complicated and very time-consuming for farmers, so the spray timing is often incorrect and the control is generally poor (Ward & Smart 2011). Moreover, even if the spray timing is correct, the effects of commonly available insecticides (pyrethroids, neonicotinoids) are often unsatisfactory (Matłosz & Kaniuczak 1997;Bruce et al 2011;Seidenglanz et al 2011). Problems with controlling this insect pest imply lost opportunities for growers in lucrative markets for doi: 10.17221/122/2015-CJGPB seed stock production and human consumption (the latter is not the case for CZ growers) due to crop rejection on standards of quality.…”

Efficacy of Insecticides Against Pea Weevil <i>Bruchus pisprum</i> (L.) on Field Pea

“…There was insignificant difference with pre and post treatment application egg counts; though statistically non-significant, there was a clear reduction with treatments. Seidenglanz et al (2011) observed that pyrethroid insecticides were more effective compared to the neonicotinoids. As such the number of died eggs might be compensated by the newly oviposited eggs and, egg numbers before and after treatment application probably balanced each other.…”

Pest control strategies and damage potential of seed-infesting pests in the Czech stores - a review

“…Rychlik, Telefon, and Viktoria). This species still remains pestilential because of uncertainty about its field control, even with the modern generation of insecticides (Seidenglanz et al 2011). Additionally, the fumigation of the Bruchid infested pea seeds by phosphine in stores must be performed with care and under hermetic conditions to ensure full efficacy (Williams & Whittle 1996).…”