The physiological age-grading system provides a mean of assessing whether Neochetina reared females at our facilities were able to reproducing in field. About 97% of females showed functioning ovaries with well egg production and 3% were young individuals. On the other hand,
the tests results to detect insect pathogens pointed out that Neochetina was healthy. This procedure gives confidence on the reproductive capacity of the produced insects and on their free pathogens condition. Then Neochetina spp. healthy and fecund individuals were released repeatedly. Besides, according to Deloach and Cordo (1976), seasonal abundance of Neochetina is optimal in October when a large population of larvae is produced and therefore a large damage on E. crassipes can be produced.