SEASONAL FLUCTUATION OF THE SPINY BOLLWORM, Earias insulana (BOISD.) ON SOME HOST PLANTS | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 8, Volume 6, Issue 10, October 2015, Page 1415-1425 PDF (234.79 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2015.75338 | ||||
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| Authors | ||||
| A. E. A. Amer; A. A.A. EL-Sayed; M. S. Hashem | ||||
| Plant Protection Research Institute, Agriculture Research Center, Dokki, Egypt | ||||
| Abstract | ||||
| 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 2nd & 3rd and 3rd & 4th 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 4th week and 3rd week of August and 2nd and 3rd weeks of October and three peaks in okra at 4th and 2nd week of June, 2nd week of September and 3rd 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 3rd week of August with 3.0 and 4.0% and 3rd 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. | ||||
| Keywords | ||||
| seasonal fluctuation; Earias insulana and host plants | ||||
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