Pemakaian adjuvant untuk mengurangi takaran glifosat dalam pengendalian lalang (Imperata cylindrica (L) Beauv.).
1988
Nasution U. | Kusnanto U.
Field trials to test the efficacy of some adjuvants to reduce the dosage of glyphosate for lalang control in rubber plantations have been conducted in North Sumatera. The result showed that in glyphosate applications, the use of ethylan, humic acid, or polyoxyethylene tallow amine in tank mixes is promising to reduce the dosage of glyphosate for lalang control. In low volume application of glyphosate, the use of 1,6 kg a.l./ha ethylan could decrease the dosage of glyphosate up to 30 percent of the standard dosage, while the efficacy remained relatively equal with CDA technique using standard dosage. By using 0,24 kg a.l./ha humic acid, or 1,74 kg a.l/ha polyoxyethylene tallow amine, dosage of glyphosate should be reduced 30 percent, while the efficacy was equal to the standard dosage of glyphosate alone. It was indicated that for the less vigorous and less dense lalang community, by using ethylan, humic acid, or polyoxyethylene tallow amine at those dosage, the reduction of glyphosate could be expected up to 50 percent. Depending on the price of the adjuvants, 12-38 percent reduction of lalang control cost could be achieved by using those adjuvants.
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