STUDIES ON INTERCROPPING OF LEGUMES ON GROWTH AND YIELD OF MULBERRY AND REARING PERFORMANCE OF THE SILKWORM Bombyx mori L.
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Date
2013-07-15
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University of Agricultural Sciences GKVK, Bangalore
Abstract
Studies on intercropping of legumes on growth and yield of mulberry and
rearing perfonnance of silkworm Bombyx mori L." was carried out during
2011-13 in the Department of SericuJture, UAS, GKVK, Bangalore - 65. The
results revealed that, the pH (8.03), plant height (160.5cm), highest number
of shoots per plant (20.00), maximum leaf yield (56.78 t/ha/year) were
recorded in sole mulberry, higher EC (0.275 dsmĀ·1), organic carbon (0.56%),
available nitrogen (256.65 kg/ha) in Mulberry and soybean, phosphor-us
(48.05 kg/ha), potassium (189.42 kg/ha) recorded in mulberry and cowpea.
The maximum leaf moisture in top leaves (75.23 %), chlorophy11 'a' ( 1.25
mg/ g) and chlorophyl1 'b' was (0.45 mg/ g) recorded in middle leaves
mulberry and soybean intercrops. Highest number of pods (91.61) and Seed
yield (972.30 kg/ha) was recorded in French bean intercropping with
mulberry, Significantly more larval weight (38.36 g/ 10), ERR (91.6 %) and
shorter fourth and fifth instar larval duration (5.13 days) and (6.92 days),
better cocoon weight (19.38 g/10 cocoons), Pupal weight (15.86 g/10) and
shell weight {3.51 g/ 10 shells) obtained in mulberry intercrop with soybesn
and least she11 ratio percentage (15.46), filament length (734 m) and thicker
denier (2.26 ) was obtained in sole mulberry. Least incidence of flacherie
( 1.33 %), grasserie ( 1.40 %) and muscardine (2. 75 %) was noticed in
mulberry and soybean intercrops. Least number of weeds (8.71) were
noticed in mulberry and green gram. Maximum net returns (Rs 26,086.10 )
and cost benefit- ratio (3.2 ) recorded in mulberry and French bean.
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