Effect of Palizin, Diflubenzuron, Chlorpyrifos, Deltamethrin and Hexaflumuron on bio- demographic characteristic and feeding index of Flour moth, Anagasta kuehniella, (Lep: Pyralidae)

Subject Areas : Plant Pests

Bahramullah Tavakoli ¹ , Maryam Ajam Hosni ²

1 - MSc. student in Entomology Plant Protection Department, Faculty of Agriculture, Shahrood University of Technology, Shahrood, Iran.
2 - Assistant professor, Plant Protection Department, Faculty of Agriculture, Shahrood University of Technology, Shahrood, Iran.

Received: 2017-01-14 Accepted : 2017-04-05 Published : 2017-05-22

Keywords: flour moth, chemical mixtures, sublethal effect, feed index,

Abstract :

Flour moth Anagasta kuehniella (Lep: Pyralidae) is one of the stored product’s and nut’s pests which controlling of it, is highly essential. In the present study, the sub lethal of these mixtures Palizin, Diflubenzuron, Chlorpyrifos, Deltamethrin and Hexaflumuron on index of bio- demographic of third instar larval, pupa and adult stage of flour moth and pest feeding indices are examined. Larvae of flour moth were grown under the experiment conditions: temperature 25±3, humidity 40±5 percent and light period 14:10 hours. In order to calculate food indices used of the floured disks covered in poisons. The minimum larva period, the minimum pupal period and the minimum pupa weight were 14±0.4 day, 7.75±0.25 day and 0.016±0.0004 gram respectively, related to Palizin and the maximum larva period, the maximum pupal period and the maximum pupa weight were 19.75±0.25 day, 9.75±0.25 day and 0.012±0.0004 gram respectively, related to Deltamethrin. Also the minimum amounts of oviposition and the minimum amounts of eggs hatching percent and the minimum percent of perfect insects exit were 237±2.27, 61±0.81 percent and 27.5±2.5 percent, respectively and the maximum amounts of these were 247.75±1.25, 73.75±0.47 percent and 42.5±2.5 percent, respectively related to Deltamethrin. In the results of calculation of feeding index, Deltamethrin treatment had the minimum amounts of the relative growth rate, the relative usage rate and the efficiency index of transforming swallowed food in third instar larvae and the maximum of these related to Palizin.