Effect of chemical seed treatments on storability in 2 barley seed varieties
1991
Ponnipha Loetsinmongkhon (Agricultural Research and Trainning Center, Lampang (Thailand))
Barley seeds were treated with insecticide and fungicide namely: Savin 85, Posse 25 ST, Vitavax and Dithane M-45 individually and in combination rating as 2, 10, 2 and 2 grams per 1 kilogram of barley seed, respectively. All seeds were put in paper bag and plastic bag and placed in a conditioned storage at 15-20 deg C and 50-60 % RH and ambient storage at LARTC for 9 months. Seed moisture content, seed germinability and seed vigor were determined by the accelerated aging test at 45 deg C-100 % RH at three-month intervals. All treatment of BRB2 and Ang Khang 1 barley seeds had significant differences in seed moisture content. Seed moisture content of those in paper bag changed more than those in plastic bag. In ambient storage, seed moisture content changed according to relative humidity more than the conditioned storage. Kind of container and storage condition affected germination and vigor of all seeds when stored at longer time and with or without chemical treatment. Chemical seed treatment which affected seed quality of both varieties were Dithane M-45, Posse and Sevin. Seed germination and vigor were reduced. Using combination of insecticide and fungicide had more effect on seed quality. Moreover, chemical seed treatment was more effective when seeds had higher moisture content. However, Posse was considered more efficient than Sevin and Vitavax was more efficient than Dithane M-45, because of less seed injury. Posse in combination with Vitavax had better result when compared to other treatments in both ambient and conditioned storage.
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