EFFECT OF SEED COLOURING ON FIELD PERFORMANCE AND SEED STORABILITY IN HYBRID MAIZE
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Date
1998-08-19
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
An investigation was carriedout to study the effect of seed colouring on
field performance and seed storability in hybrid maize during 1996-97 at
Department of Seed Science and Technology, U.A.S., Dharwad. Seeds were treated
with.four dyes viz., Amaranthus red, Sunset yellow, Methylene blue and Potassium
permanganate each at three concentrations of 0.0, 0,5 and 1.0 per cent in
combination with or without fungicide and seeds were stored for 16 months in
cloth bag under ambient conditions.
Throughout storage period, seeds treated with Amaranthus red and Sunset
yellow showed higher germination percentage and vigour index comparedbMethyl
blue while seeds treated with Potassium permanganate resulted in drastic
reduction of germination and vigour index. Potassium permanganate treated seeds
exhibited higher EC values throughout the storage over other dyes. The seed
moisture content fluctuated concomitantly with the change in relative humidity
and temperature of storage atmosphere. Among dyes, seed treatment with
Amaranthus red offered resistance to insect infestation, while potassium
permanganate showed least infection of storage fungi during storage^.
The germination percentage and vigour index was maximum at 0.5 per cent
concentration of dyes, followed by 1.0 per cent and minimum in control.
Throughout the storage period, the EC of seed leachate was more in the seeds
treated at higher concentration of dyes, while the percentage of insect
infestation and occurence of fungi were less at higher concentration. The
fungicide treated seeds recorded higher germination percentage and vigour index
and less EC, insect infestation and storage fungi infection throughout the
storage.
The field performance studies with dye treated seeds indicated that there
was no adverse effect on field emergence, growth parameters and yield and yield
attributes in maize.
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