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Bioefficacy of Novaluron®, a chitin synthesis inhibitor against the tropical warehouse moth, Ephestia cautella
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Keywords

Novaluron
Hocklicombi®
Ephestia cautella
warehouse moth
chitin
loss assessment

How to Cite

I, S., VY, E., & D, O.-O. (2013). Bioefficacy of Novaluron®, a chitin synthesis inhibitor against the tropical warehouse moth, Ephestia cautella. Journal of Research in Biology, 3(1), 759-767. Retrieved from https://ojs.jresearchbiology.com/index.php/jrb/article/view/279

Abstract

The tropical warehouse moth, Ephestia cautella (Lepidoptera: Pyralidae) is a major pest of stored maize in Ghana. It is controlled mainly by the use of synthetic insecticides which has become a major challenge in the stored product industry in Ghana. Both laboratory and field trials were conducted to evaluate the efficacy of novaluron, a chitin synthesis inhibitor against E. cautella. Five concentrations of Novaluron (0.1, 0.2, 0.3, 0.4 and 0.5 mL/L of water) were prepared and each concentration was topically applied on the notal regions of 10 fifth instar larvae of E. cautella per concentration. At 0.4 mL/L and 0.5 mL/L treatments, larval mortality ranged between 50-80% after 96 h of exposure. Also, Novaluron (0.5 mL/L) was used to treat four surfaces (concrete, wood, glass and plastic) usually encountered in structural insect pest management systems and the larvae exposed to these surfaces. Hocklicombi® (5 mL/L) served as positive control. Larval mortality (35.5-97.5%), pupation (0.0-35.0%) and adult emergence (0.0-20.0%) in surfaces treated with Hocklicombi® compared favourably with those treated with Novaluron (25.0-97.5%), (2.5-60%) and (0.0-42.5%), respectively. A simulated field experiment was conducted in which four batches of 5 kg of maize in miniature bags were pretreated with 0.4 mL/L Novaluron and 50 unsexed adults were introduced. This was left in a crib at the University of Ghana farm for 60 days. The field experiment showed that after 60 days of storage there was a lower weight loss in the Hocklicombi® (6.6%) and Novaluron (6.8%) treatments compared to the negative control (11.3%).

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References

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