Arthropods, 2017, 6(4): 126-136
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Comparative management of Chilo suppressalis (Walker) (Lepidoptera: Crambidae) by convenient pesticides and non-chemical practices in a double rice cropping system

Morteza Noormohammad Poor Amiri1, Faramarz Alinia2, Sohrab Imani1, Maesomeh Shayanmehr3, Ali Ahadiyat1
1Department of entomology, Science and Research Branch, Islamic Azad University, Tehran, Iran
2Faculty Member, Rice Research Institute of Iran, Rasht, Iran
3Department of Plant Protection, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

Received 12 October 2017;Accepted 20 October 2017;Published 1 December 2017

The inclination of rice growers towards double cropping system in north of Iran has raised new concerns about the excessive release of broad-spectrum pesticides, particularly organophosphates, in the environment. In this study, the efficiency of three insecticides and an integrated pest management (IPM) program for management of the striped rice stem borer, Chilo suppressalis (Walker) (Lep: Crambidae), in double cropping system was investigated under field condition. According to the results, one accurate application of hexaflumuron EC 10% (1.5 L/ha) or diazinon EC 60% (1.5 L/ha) for each generation of the pest resulted in significant reduction in dead heart and white head damage and increase in yield performance when compared with one application of fipronil G 0.2%, diazinon G 10% and diazinon EC 60% + diazinon G 10% as well as two application of diazinon EC 60% + diazinon G 10%. Additionally, considerable effect of IPM programs (mechanical, physical, and biological practices) on suppression of pest damage and improvement of yield performance was also observed. Given the environmental problems associated with excessive application of diazinon and fipronil, hexaflumuron, as an insect growth regulator with specific mode of action, can be efficiently integrated with other non-chemical methods for successful management of Ch suppressalis in double cropping systems.

Keywords dead heart;Chilo suppressalis;double rice cropping;integrated pest management;white head.

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