AMAAR, M., EL-REFAI, S. (2015). EFFECT OF FREEZING, HIGH TEMPERATURE AND LASER RADIATION FOR CONTROLLING KHAPRA BEETLE, TROGODERMA GRANARIUM (EVERTS), ON WHEAT GRAINS. Egyptian Journal of Agricultural Research, 93(4), 1069-1084. doi: 10.21608/ejar.2015.156359
MONA I. AMAAR; SHOKRY A. EL-REFAI. "EFFECT OF FREEZING, HIGH TEMPERATURE AND LASER RADIATION FOR CONTROLLING KHAPRA BEETLE, TROGODERMA GRANARIUM (EVERTS), ON WHEAT GRAINS". Egyptian Journal of Agricultural Research, 93, 4, 2015, 1069-1084. doi: 10.21608/ejar.2015.156359
AMAAR, M., EL-REFAI, S. (2015). 'EFFECT OF FREEZING, HIGH TEMPERATURE AND LASER RADIATION FOR CONTROLLING KHAPRA BEETLE, TROGODERMA GRANARIUM (EVERTS), ON WHEAT GRAINS', Egyptian Journal of Agricultural Research, 93(4), pp. 1069-1084. doi: 10.21608/ejar.2015.156359
AMAAR, M., EL-REFAI, S. EFFECT OF FREEZING, HIGH TEMPERATURE AND LASER RADIATION FOR CONTROLLING KHAPRA BEETLE, TROGODERMA GRANARIUM (EVERTS), ON WHEAT GRAINS. Egyptian Journal of Agricultural Research, 2015; 93(4): 1069-1084. doi: 10.21608/ejar.2015.156359
EFFECT OF FREEZING, HIGH TEMPERATURE AND LASER RADIATION FOR CONTROLLING KHAPRA BEETLE, TROGODERMA GRANARIUM (EVERTS), ON WHEAT GRAINS
1Plant Protection Research Institute, Agricultural Research Center, Dokki ,Giza, Egypt.
2Department of Plant Protection, Faculty of Agriculture, Ain Shams University, Cairo, Egypt.
Abstract
khapra beetle, Trogoderma granarium (Everts) (Coleoptera, Dermestidae) is one of primary insects on stored grains. To control this pest with non-chemical methods, all stages (eggs, larvae, pupae and adults) of the pest were exposed to low and high temperature for different periods. Results revealed that mortality of all stages of T. granarium reached 100% after 7 and 5 days freezing at -10 and -15 °C, respectively. Eggs were more sensitive to low temperature than the other stages. On the other hand, high temperatures of 50 and 60 °C caused 100% mortality for all stages of the same pest after 6 hours of exposure. The increase of high temperature to 70 °C, the decrease of exposure period to 4 hours. Both low and high temperatures significantly affected germination and chlorophyll contents of wheat grains. Also laser ray of solid state of diod pump (wave length of 532 nm) reduced egg hatchability and pupation as well as adult emergence of exposed 0-1 day old eggs or 0-1 day old pupae. Laser irradiation significantly reduced germinationrate, but there was no effect on chlorophyll content.
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