TOXICOLOGICAL AND BIOCHEMICAL EFFECTS OF PRECOCENE II AGAINST COTTON LEAFWORM, SPODOPTERA LITTORALIS (BOISD.) | ||
| Egyptian Journal of Agricultural Research | ||
| Article 15, Volume 97, Issue 1, January 2019, Pages 179-186 PDF (604.07 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2019.68627 | ||
| Authors | ||
| Abdelgawad A. FAHMI* 1; Mahmoud I. NASSAR2; Erian S. MANSOUR3; Anwaar M. ABAZA3; RANIA A. SALAMA3 | ||
| 1Chemistry Department, Faculty of Science Cairo University | ||
| 2Entomology Department , Facu lty of Science Cairo University. | ||
| 3Plant Protection Research Institute, ARC. , Dokki, Giza, Egypt. | ||
| Abstract | ||
| The cotton leafworm, Spodoptera littoralis (Boisd.) is very polyphagous insect against the most economic plants all over the world. The traditional synthetic chemical insecticides had dramatic effect on the living organisms including man. Anti-juvenile hormones; precocene II effect on the cotton leafworm, Spodoptera littoralis were assayed under laboratory conditions. (PrecoceneII (6,7-dimethoxy-2,2dimethylchromene) was the main constituent isolated from Ageratum houstonianum plant. The compound caused toxicity against the larvae with (LC10 was 5.59 mg/l), (LC25 was 24.69 mg/l) and (LC50 was 128.53 mg/l). There was some morphogenic effect obtained due to effect of precoceneII on larvae, pupae and adult stages. On the other hands the biochemical analysis of the cotton leafworm revealed that precocene II caused significant increase in chitinase, protease and total carbohydrates with (17.32, 50.17 and 36.85 %), respectively comparison to control. | ||
| Keywords | ||
| Biochemical analysis; Toxicology; Precocene II; IGRs; Antijuvenile hormone; Spodoptera littoralis | ||
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