The Journal "Agriculture and Forestry"
Časopis "Poljoprivreda i šumarstvo"
- Since 1955 -
Volume 59, Issue 4
| Volume : | 59 |
| Issue : | 4 |
| Authors : | Hamid SAKENIN CHELAV, Adel KHASHAVEH, Farshid SHAKHSI ZARE |
| Title : | ADULT MORTALITY AND PROGENY PRODUCTION ASSESSMENT OF Callosobruchus maculatus (COLEOPTERA: BRUCHIDAE) EXPOSED TO SAYAN® |
| Abstract : | The insecticidal efficacy of Sayan®, an Iranian formulation of diatomaceous earth, was evaluated against adults of Cowpea weevil, Callosobruchus maculatus (Coleoptera: Bruchidae) on cowpea. Sayan® was applied at the dose rates of 0.0, 0.1, 0.2, 0.5, 1.0 g/kg. One kg of cowpea was treated with appropriate dose rate and after one day, four samples of 50 g of each were taken as replication. Twenty five adults were introduced into each replication. The number of dead adults was counted after 24 and 72 h exposure. After mortality count, all surviving insects were removed and the samples retained under the same conditions for a further 35 days to assess progeny production. For adult’s mortality, significant differences were found between dose rates, exposure times and associated interaction. The percentage of cowpea weevil adult’s mortality was very low at the dose rates of 0.0, 0.1 and 0.2 g/kg (less than 5%) after both exposure times. The mortality rate increased with increase of dose rate and exposure time and reached 68% at the dose rate of 1.0 g/kg 72 h after exposure. Also, for progeny production, significant differences were found between dose rates, exposure times and associated interaction. In both exposure times, the highest number of F1 progeny was recorded at 0.0 g/kg and increasing in dose rate significantly decreased the progeny production. The obtained results clearly revealed that Sayan® is effective against C. maculatus but higher dose rates and exposure time are needed to achieve satisfactory control of this pest in cowpea. |
| For citation : | Hamid SAKENIN CHELAV, Adel KHASHAVEH, Farshid SHAKHSI ZARE (2013): ADULT MORTALITY AND PROGENY PRODUCTION ASSESSMENT OF Callosobruchus maculatus (COLEOPTERA: BRUCHIDAE) EXPOSED TO SAYAN®. Agriculture & Forestry, Vol. 59. Issue 4: 115-126, 2013, Podgorica |
| Keywords : | Callosobruchus maculatus, Cowpea, Sayan®, adult mortality, progeny production |
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