Influence of Additive, Age of Foliage and Application Technique on the Control of Imperata Cylindrica (L.) Beauv. With Dalapon and Glyphosate
Experiments were conducted to evaluate the influence of ammonium sulphate as an additive to dalapon (2, 2-dichloropropionic acid, Mg/Na salt) and glyphosate N (phosphonomethyl) glycinel and the influence of age of foliage and spray volume., on the control of lalang imperata cylindrica (L.) Beau...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1981
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10182/1/FP_1981_3.pdf |
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| Summary: | Experiments were conducted to evaluate the influence
of ammonium sulphate as an additive to dalapon (2, 2-dichloropropionic
acid, Mg/Na salt) and glyphosate N (phosphonomethyl)
glycinel and the influence of age of foliage and spray volume.,
on the control of lalang imperata cylindrica (L.) Beauty.
The most effective site of uptake of glyphosate in the control
of lalang was also determined.
Higher rates of glyphosate (2.0 kg/ha) and dalapon
(15 kg/ha) gave higher leaf injury ratings on the 1-,3- and
6-month foliage treatments compared to lower rates (1.5 and 10
kg/ha respectively) in both the field and pot experiments.
Improved ciontrol with higher glyphosate rate was also reflected
in the significantly lower dry weight of rhizomes harvested
90 days after treatment in the pot experiment. There were no
significant differences in the two levels (10 and 15 kg/ha)
of dalapon used in terms of weight of rhizomes irrespective of
foliage age in both the experiments. At the usual recommended
rates, glyphosate gave better control of lalang than dalapon
in both the field and pottrials; glyphosate was also more
effective on younger foliage than dalapon. The results also
suggest that there was no advantage in cutting the lalang
foliage and treating the young foliage regrowth with dalapon .
Significant antagonistic responses due to ammonium
sulphate (5 kg/ha) as additive were obtained with 1-and 3-month
old foliage treatments at the 10 kg /ha dalapon level. |
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