{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,8]],"date-time":"2025-11-08T12:17:52Z","timestamp":1762604272999,"version":"3.40.5"},"reference-count":34,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2021,9,7]],"date-time":"2021-09-07T00:00:00Z","timestamp":1630972800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":["cambridge.org"],"crossmark-restriction":true},"short-container-title":["Bull. Entomol. Res."],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Cotton crops are an important agricultural product in Egypt. However, the bollworm <jats:italic>Earias insulana<\/jats:italic> is a significant pest of cotton. Field experiment was carried out during the 2018 and 2019 seasons at Qaha Experimental Station, Qalyoubia governorate to determine the best dates for sowing cotton crops, to minimize <jats:italic>E. insulana<\/jats:italic> infestation and maintain high populations of the predators of spiny bollworm. The latest sowing date had a significantly lower infestation of squares, flowers and green bolls than the other two sowing dates. After spraying the three planting date plots with profenofos, lambda-cyhalothrin and methomyl insecticides, infestation of cotton bolls by spiny bollworm was significantly reduced in treated compared with untreated plots. A significant positive correlation (<jats:italic>r<\/jats:italic> = 0.829* and 0.827*) was found between the average temperature and <jats:italic>E. insulana<\/jats:italic> infestation of squares and flowers, respectively, for the first planting date and (<jats:italic>r<\/jats:italic> = 0.819*) in squares for the second planting date of untreated plots of season 2018. The explained variance percentages of multiple regression analysis showed that the effects of mean temperature and relative humidity (RH) on the third sowing date had a significantly lower infestation of squares, flowers and green bolls by spiny bollworm as compared to the first and second sowing dates. The populations of common natural enemies of <jats:italic>E. insulana<\/jats:italic> on cotton plants, i.e., <jats:italic>Chrysoperla carnea<\/jats:italic>, <jats:italic>Coccinella undecimpunctata<\/jats:italic> and spiders were counted during the two seasons. The correlation between the RH percentage and populations of the three predators was insignificantly positive during the 2018 season, while it was negatively or positively insignificant during the 2019 season. The correlation between the mean temperature and the populations of the three predators was insignificantly negative for <jats:italic>C. carnea<\/jats:italic> and positive for spiders during the 2018 season, whereas a positive correlation was found between temperature and <jats:italic>C. carnea<\/jats:italic> and spiders and a negative correlation between temperature and <jats:italic>C. undecimpunctata<\/jats:italic> during the 2019 season.<\/jats:p>","DOI":"10.1017\/s0007485321000602","type":"journal-article","created":{"date-parts":[[2021,9,7]],"date-time":"2021-09-07T01:41:02Z","timestamp":1630978862000},"page":"58-69","update-policy":"https:\/\/doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":1,"title":["Effect of planting dates and recommended insecticides application on <i>Earias insulana<\/i> (Boisd.) and its associated predators in cotton field in Egypt"],"prefix":"10.1017","volume":"112","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4395-0175","authenticated-orcid":false,"given":"Hemat Z.","family":"Moustafa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2021,9,7]]},"reference":[{"key":"S0007485321000602_ref26","first-page":"752","article-title":"Correlation between pink bollworm infestation and weather parameters in Bt and non-Bt cotton","volume":"20","author":"Nadaf","year":"2007","journal-title":"Karnataka Journal of Agricultural Sciences"},{"key":"S0007485321000602_ref17","first-page":"159","article-title":"Relative abundance of some cotton pests and the simultaneous effect of certain weather factors on their activity in Zagazig region, Egypt","volume":"22","author":"Hassanein","year":"1995","journal-title":"Zagazig Journal of Agriculture Research"},{"key":"S0007485321000602_ref1","unstructured":"Abdelrahman, MY and Sanaa, AI (2010) Population fluctuations of the spiny bollworm, Earias insulana (Boisduval); pink bollworm Pectinophora gossypiella (Saunders) and their associated predators. 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