Predication The Cotton Leafworm, Spodoptera littoralis (Boisd.) Field Geuerations As Influenced by Heat Unit Accumulation التنبؤ بالأجيال الØقلية لدودة ورق القطن، باستخدام الوØدات الØرارية التراکمية | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 4, Volume 10, Issue 8, August 2019, Page 403-406 PDF (412.19 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2019.58185 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| جمال على المزين1; عبد البديع عبد الØمید غانم2; عبد الخالق السید عبد الرازق Øاتم1 | ||||
| 1معهد بØوث وقاية النباتات – مرکز البØوث الزراعية – دقى - جيزة | ||||
| 2قسم الØشرات الاقتصادية- کلية الزراعة – جامعة المنصورة. | ||||
| Abstract | ||||
| The present study was conducted at the experimental farm, Sakha Research station, Kafr El –Sheikh region under field conditions during the seasons of 2016 and 2017. Results indicated that the population of the cotton leafworm moths. Spodoptera littoralis (Boisd.) had seven peaks starting from the 3rd week of May until the 1st week of September during the two studied seasons. The highest number of moths was recorded during the end of June which being 8023.2 and 2063.2 moth /trap/ 30 days and 60 days after cotton planting in both seasons, respectively. The predicted peaks of generations could be detected when the accumulated thermal units recorded 525.42 DD's. The predicted peaks for the detected four generations varied from +1 to +8 days from the observed peaks. For better prediction of the cotton leafworm the period between the observed and expected peaks should be positive and as short as possible when early preparation of control materials are of great important, consequently, it could be helpful when IPM tactics are considered. | ||||
| Keywords | ||||
| Cotton leaf worm; Spodoptera littoralis; peaks; predicting; generations; thermal units accumulations | ||||
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