QUALITATIVE AND BIOASSAY ASSESSMENT OF GLYPHOSATE HERBICIDE USING CERTAIN GROUND SPRAYERS AND DIFFERENT APPLICATION RATES IN MANGO ORCHARDS | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 4, Volume 90, Issue 4, December 2012, Page 1433-1444 PDF (303.98 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2012.163493 | ||||
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| Author | ||||
| ABDEL-MEGED E. AMMAR | ||||
| Spray technology Department, Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt. | ||||
| Abstract | ||||
| Two field experiments were undertaken in El – Ismaillia regions , Egypt to evaluate the performance of different spraying volumes and rate of glyphosate herbicide on annual and perennial weeds control in mango fields 7 years old orchard during 2009 and 2010 summer seasons . Spraying equipment tested were Cp-3 sprayer fitted with TK1 125 L./Fed. or flat fan 02- F110 nozzles 60 L./Fed., Micron Ulva sprayer 19 L./Fed. and Besho sprayer fitted with fan style spray head 70 L./Fed. with the use of rates doses of glyphosate (Herbazid 48% wsc) i.e. 4.0, 2.5 and 1.25 L./Fed. with TK1 nozzle, 2.5 and 1.25 L./Fed. with both flat fan 02- F110 nozzle, Ulva sprayer and Besho sprayer as compared with hand hoeing and unweeded check. Each experiment was included eleven treatments in a complete randomized block design with four replicates. Data indicated that the using of flat fan 02- F110 nozzel and Micron Ulva sprayer (Herbi) can reduced glyphosate rate dose to 2.5 L./Fed. compared with TK1 nozzle at rate dose 4 L./Fed. without effect on weed control efficacy. The same sprayers were reduced the contamination of applicator to 6.44, 10% in the first season and 9.1, 10.1% in the second season respectively, at the same rate dose of 2.5 L./Fed. the percentage control which obtained by these spraying volumes were 91.3% and 85.8 % in the first season and 94% and 86.9% in the second season respectivily, as compared with TK1 125 L./Fed. spraying volume which gave 94.1% and 96.7% for the first and second seasons respectively at rate dose of 4 L./Fed. of glyphosate. In case of Besho sprayer 70 L./Fed. spraying volume gave satisfactory coverage on weed leaves and excellent control of weeds. The low rate of glyphosate at rate dose 1.25 L./Fed. gave good efficacy in controlling annual weeds which reached 82.3% control for existed weeds and exceeded hand hoeing. Thus it could be concluded that, low volume spraying could reduced glyphosate rate dose without any significant reduction in control efficacy of total weeds and decreasing the amount of contamination of applicator and reduced lost spray on land and other possible risks on the environment. | ||||
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