Effect of seed treatments with polymer and chemicals on longevity of wheat
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Date
2022-11-15
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Publisher
palampur
Abstract
The present investigation was done to study the effect of seed treatments on
seed quality parameters and further to identify the effective seed treatment for
enhancing seed longevity in wheat. The seeds of wheat variety HPW155 were treated
with nine different treatments consisting of polymer, fungicides, insecticide,
polymer-fungicides and polymer-insecticide combinations. The treated and untreated
seeds were stored in three replications for thirty six months after packing in HDPE
(High density polyethylene) interwoven non-laminated bags. The evaluation of
different seed quality attributes was made at bi-monthly intervals for twelve months
(25th
- 36th months). The experiment revealed that inspite of seed coating, there is
deterioration in seed as well as the seed vigour declined with ageing of seeds.
Amongst different seed treatments, seed coated with polymer @ 3.0 ml/kg of seed
+ vitavax 200 @ 2.0 g/kg of seed (T6 ) was found superior for maintaining quality
attributes viz., germination (88.33%), rate of germination (17.86), seedling length
(15.11 cm), seedling dry weight (10.42 mg), seedling vigour index- I (1335), vigour
index- II (920) and field emergence (69.00%) which was at par with T5 (vitavax 200
@ 2.0 g/kg of seed) for all the above mentioned quality attributes at the end of
36 months of storage in comparision to untreated control (T1). Although these two
treatments resulted to maintain the germination (%) above Indian Minimum Seed
Certification Standards (IMSCS) upto 36 months of storage, however, it is not
advisable to use seeds after 36 months of storage as the field emergence (%) and final
plant stand (%) declined significantly