INFLUENCE OF SOME AGRICULTURAL PRACTICES ON INFESTATION LEVELS OF RICE WITH CHILO AGAMEMNON BLES | ||
| Egyptian Journal of Agricultural Research | ||
| Article 4, Volume 75, Issue 2, July 1997, Pages 331-338 PDF (2.01 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1997.404732 | ||
| Authors | ||
| ALI M. SOLIMAN; MOHAMED A. MOHAMED | ||
| Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt | ||
| Abstract | ||
| The effects of four agronomic practices on rice infestation with chilo agamemnon were investigated, and are summarised as follows : 1-Broadcasted rice was less infested (9.30%) than the trans-planted (12.08%). Regardless of the used varieties. 2-Among six transplanting spaces (30x30, 20x30, 20x20, 20x15, 20x10 and 10x10 cm, the narrower the spaces (20x10 and 10x10) the lower infestation (6.02 and 5.81%, respectively). 3. Testing three irrigation systems (continuous flooding, 4 days on + 6 days off and 4 days on + 12 days off) showed that the borer in-festation decreased from 11.85 to 8.40% as the water in the field was decreased from continuous flooding to 4 days on + 12 days off. 4- When three levels of nitrogen fertilizer (0,40 and 60 kg/fed) were tested, the borer infestation decreased from 15.25 to 12.70% as the fertilizer level decreased from 60 to 0 kg/fed. Therefore narrow transplanting space, broadcasting method, low water irrigation and low nitrogenous fertilization are recommended to decrease the nee stem borer infestation in rice fields. | ||
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