Gamma Radiation: An Eco-Friendly Control Method for the Rice Weevil, Sitophilus oryzae (L.) (Coleoptera:...

Area of Science:

• Agricultural Entomology
• Radiation Biology
• Plant Physiology

Background:

• The rice weevil (Sitophilus oryzae) is a major global pest of stored grains.
• Effective and eco-friendly pest control methods are crucial for food security.

Purpose of the Study:

• To evaluate the lethal, reproductive, and histological effects of gamma irradiation on adult rice weevils.
• To assess the impact of irradiated grains on wheat seedling germination, chlorophyll, and proline content.

Main Methods:

• Wheat grains infested with rice weevils were exposed to gamma radiation at doses of 0.10, 0.25, 0.50, and 1.00 kGy.
• Adult mortality, sterility, and histological changes were recorded.
• Wheat seedling parameters (germination, chlorophyll, proline) were analyzed.

Main Results:

• A dose of 1.00 kGy resulted in 100% adult mortality within 96 hours.
• All tested doses induced complete sterility in adult rice weevils.
• Gamma irradiation affected chlorophyll content and significantly increased proline levels in wheat seedlings at higher doses.

Conclusions:

• Gamma radiation is a viable, eco-friendly strategy for controlling stored-product pests like the rice weevil.
• This method offers a pest control solution without adverse residual effects on stored grains or subsequent plant growth.