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The seasonal fluctuation of the spiny bollworm (SBW), Earias insulana (Boisd.), (moths and larvae) was detected on cotton, Gossypium barbadense L., okra, Hibiscus esculentus L. and maize, Zea maize L. at Minia Elkamah district, Sharkia Governorate during 2013 and 2014 seasons. Results revealed that the population of SBW male moths recorded four peaks on cotton and okra each season , the fourth peak appeared the highest numbers on the 2 & 3 and 3 & 4 weeks of October with 39 & 57 and 45 & 65 moths/trap/week in the two cotton and okra seasons, respectively. While, on maize, the population of moths recorded two peaks with 7&11 and 10&13 moths /trap/ week in first sowing date and one peak with 30 and 40 moths /trap/ week in second sowing date during the two seasons, respectively. The infestation percentage by the SBW larvae was recorded two peaks in cotton at 4 week and 3 week of August and 2 and 3 weeks of October and three peaks in okra at 4 and 2 week of June, 2 week of September and 3 week of November; the second peak in cotton (26.0 and 19.0 %) and third peak in okra (33.0 and 37.0 %) were the highest than other during the two seasons, respectively. While, the highest infestation percentage by the SBW larvae which attack maize was recorded in 3 week of August with 3.0 and 4.0% and 3 week of November with 5.0% in the first and second sowing date during the two seasons, respectively. The infestation by the SBW larvae and the population of SBW male moths captured in sex pheromone traps were highest on okra followed by cotton and maize. The population of SBW moth catches was negatively correlated with mean of temperature and positively correlated with mean of relative humidity in 2013 and 2014 seasons. This study play an important role in determine timing to control of the SBW.

SEASONAL FLUCTUATION OF THE SPINY BOLLWORM, Earias insulana (BOISD.) ON SOME HOST PLANTS