PRUNING PRACTICES FOR MAXIMIZATION OF MULBERRY LEAF PRODUCTIVITY UNDER UAS SERI SUVARNA TECHNOLOGY AND REARING PERFORMANCE IN RAINFED CONDITION
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Date
2007-09-17
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University of Agricultural Sciences GKVK, Banglore
Abstract
Field experiment was carried out to investigate the effect of pruning practices for
maximization of mulberry leaf productivity under UAS Seri Suvama technology on
growth and yield of Ms mulberry variety and the silkworm B. mori L. in relation to
rearing performance in rainfed condition at Department of Sericulture, UAS, GKVK,
Bangalore during the year 2004-05. The results indicated that mulberry growth parameter
viz., number of branches and leaves, leaf yield, leaf moisture, chlorophyll a, b content,
total chlorophyll content, total soluble sugar and protein content NPK, Ca, Mg and S
content were influenced by the pruning practices. However, pruned crop shows 90 cm
height more / higher of all the above parameters which is followed by pruning at 60 cm,
30 cm bottom pruning, 90, 60 and 30 cm with normal shoots as compared to non-UAS
Seri Suvarna.
Similarly, the soil moisture content at 60 cm depth and soil arthropods
populations like beetles, grubs, termites, centipedes and earthworm were higher in
treatment of 90 cm height pruned plots as compared to other treatment. The larval weight
cocoon weight, growth rate, shell weight, shell percentage, silk productivity and ERR
percentage and silk filament was also higher in 90 cm height, pruned plots, which is
followed by 60, 30 cm bottom pruning 90, 60, 30 cm height with normal shoots
compared to non-UAS Seri- Suvama. The instar duration larval duration, silk denier and
disease incidence was less in 90 cm height pruned plot as compared to other treatment.
Similarly, benefit cost ratio 90 cm height pruned crop was 5 : 73 which is followed by
5:11 and 5 : 07 in 60 and 30 cm height pruned plot respectively, the lowest B:C ratio of
1 : 92 was obtained in non-UAS Seri Suvarna technology
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