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คณะเกษตรศาสตร์ มหาวิทยาลัยเชียงใหม่

 

  ISSN: 0857-0841 (Print)
  ISSN: 2630-029X (Online)
 


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"Article Journal of Agriculture"
Volume 35 Issue 1 January 2019 , ISSN 0857-0841
Title. : Efficacy and Residues of Bromacil and Diuron for Weed Control in Pineapple Fields
Author : Nathaya Ruanpan, Kannika Sajjaphan and Tosapon Pornprom
Page : 37-48
index word : ยูราซิล ฟีนิลยูเรีย สารกำจัดวัชพืชตกค้าง ความปลอดภัยทางด้านสิ่งแวดล้อม
Abstract:
The widespread use of bromacil and diuron in pineapple fields raises the possibility of residue accumulation following repeated applications. This can impact health, food and environmental safety. Therefore, the objectives of this study were to evaluate the effect of herbicide following repeated applications on pineapple fields and determine the herbicide residues in soil by UPLC-MS/MS. Field experiments were conducted from November 2015 to August 2016 in Chon Buri. The experiment was a RCBD with four replications. The treatments were 1) weed check, 2) hand weeding, 3) bromacil 2,000 + diuron 2,000 g a.i./ ha, and 4) bromacil 5,000 + diuron 2,500 g a.i./ ha. Herbicide applied at 0, 90 and 180 DAP. Evaluation the effect of herbicide for weed control following repeated applications on pineapple fields. With the application of bromacil 2,000 + diuron 2,000 g a.i./ ha was sufficient to provide satisfactory full-season control of several weed species, caused no visible crop injury and had no effect on plant growth but effect on final yield. Bromacil 5,000 + diuron 2,500 g a.i./ ha caused visible crop injury after herbicide applications. The visual injury seen in pineapple after herbicide application was chlorosis and transient and had no effect on plant growth but effect on final yield. In addition, determination of herbicide residues were showed low levels of bromacil and diuron in soil at 90 DAA. The application of bromacil 5,000 + diuron 2,500 g a.i./ ha caused the highest herbicide residues in soil. Bromacil residues were higher than of diuron residues in soil. In the dry season, herbicide residues was showed accumulation in soil. In the rainy season, herbicide residues was not accumulation in soil. The results indicated that after 3 times of application, bromacil 2,000 + diuron 2,000 g a.i./ ha was the optimal dosage for weed control. Herbicide residues were present in soil which are not above the maximum permissible concentration as restricted by the Pollution Control Department.
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