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THE EFFECTIVENESS OF THE BIOLOGICALINSECTICIDE AGREEN AND SOME INSECTICIDES AND GROWTH INHIBTORS AGAINT EARIAS INSULANA BOISD (NOCTUIDE:LEPIDOPTERA) IN COTTON FIELD | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 38, Issue 6, 2007, Pages 86-97 | ||
| Authors | ||
| Abdl-Satta A. Ali; Ibrahim J. Aljboory; Amal S. Abdl-Razak | ||
| Abstract | ||
| Laboratory and field experiment were conducted to evaluate the effectiveness of the biological insecticide Agreen and some growth inhibitors on the spiny boll worm Earias insulana Boisd..Results of laboratory indicated no egg hatch for newly laid egg treated with growth inhibitors. However, percentage of egg hatch was significantly reduced for four days old eggs, treated with growth regulators. As, for Agreen, percentage of egg hatch were 73.25% and 92.4% for one day and four days old eggs, respectively. Results have also indicated that all insecticides were significantly effective against third instar larvae. The growth inhibitors, Runner, was the best being percent of killing reached 100% after five days of treatment. Similar results were also obtained with the biological insecticide Agreen. Continuous effect of the insecticides was observed on subsequent stages originated from treated instars. These includes, increased larval and pupal duration, reduced pupal weight and delayed adult's emergence. Adults moths fed on sugar solution (10%) mixed with different concentrations of Agreen and growth regulators, showed reduced longevity, fecundity and egg hatchability.Field studies conducted in 2002 growing season have also indicated that the growth inhibitor Nomolt was superior for controlling the pest with percent of killing reached 84.6% However, during the 2003 growing season the growth inhibitor Runner was the most effective insecticide. The percents of effectiveness for Runner and Agreen were 80.3% and 64.4% respectively The neonecotinoid insecticides Acetamprid, imidacloprid and thiamethaxam did not show any observed influence against the pest during this season. Better cotton yield parameters were recorded for the growth inhibitors. The highest yield was obtained with Runner and Match treatments. Therefore the growth inhibitors and the biological insecticide Agreen can be incorporated as an essential elements in control in iraq. | ||
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