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Original Articles Open Access
The autumn tomato variety A-V262 were planted in two Egyptian governorate Behyra and Qalubyia to control the tomato pin worm Tuta absoluta. under laboratory conditions, the LC50 of T. absoluta, recorded , 49, 67, 87, 101, 122,133 and 135 ppm for newly hatched larvae, 1st larval instars, 2nd larval instars, 3rd larval instars, adult males and adult females, respectively The effect of nano chitosan under laboratory conditions showed that, the LC50 of the corresponding stages of T. absoluta, 19, 27, 29,43, 44,66 and 69, respectively When the tomato crop cultivated in green house, and treated with the testes chitosan , the infestations means number recorded significantly decreased to 16.0±8.1 individuals after nano chitosan treatments as compared to 99±9.6 individuals in the control.
chitosan, nano. Tuta absoluta, tomato, nano-chitosan