Residual efficacy of cypermethrin and pirimiphos-methyl against Sitophilus granarius (L.) and Plodia interpunctella (Hübner) on concrete surface
Residual activity of EC formulations of two insecticides, cypermethrin (combined with the synergist piperonyl butoxide) and pirimiphos-methyl, against Sitophilus granarius (L.) adults and Plodia interpunctella (Hübner) larvae was investigated on concrete surface. The experiment was run indoors at...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Institute of Pesticides and Environmental Protection
2014-12-01
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| Series: | Pesticidi i Fitomedicina |
| Subjects: | |
| Online Access: | http://www.pesting.org.rs/download.php/documents/29-4/29-4%20275-281.pdf |
| Summary: | Residual activity of EC formulations of two insecticides, cypermethrin (combined with
the synergist piperonyl butoxide) and pirimiphos-methyl, against Sitophilus granarius (L.)
adults and Plodia interpunctella (Hübner) larvae was investigated on concrete surface. The
experiment was run indoors at 16-24ºC temperature and 30-60% r.h. by applying water
solutions of products based on cypermethrin (48 mg AI/m2) and pirimiphos-methyl (750
mg AI/m2) to concrete surface. Insect mortality was estimated after 2, 7 and 14 days of insect
exposure to treated concrete and 7 days of recovery on untreated coarse wheat meal at
24-26ºC and 55-65% r.h in the laboratory.
High efficacy of cypermethrin against S. granarius adults (87-100%) and P. interpunctella
larvae (84-100%) was detected after 14 days of exposure to all deposits on concrete surface.
Pirimiphos-methyl achieved maximum efficacy (100%) in all treatments of S. granarius
adults and P. interpunctella larvae after 2 and 14 days of exposure, regardless of deposit
age. After 7 days of recovery, the efficacy of both insecticides mostly increased, especially
of cypermethrin, up to around 50% after two days of exposure, up to 24-45% after seven
days of exposure and up to 15% after 14 days of exposure. The results show that the EC
formulations of cypermethrin and especially of pirimiphos-methyl were highly effective in
controlling S. granarius adults and P. interpunctella larvae over a period of 60 days following
application to concrete surface. |
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| ISSN: | 1820-3949 1820-3949 |