EFFICACY OF ORGANIC BASED NUTRIENTS ON MULBERRY IN THREE TYPES OF SOILS DURING DIFFERENT SEASONS IN RELATION TO REARING PERFORMANCE OF DOUBLE HYBRID SILKWORM (BOMBYX MORI L.)

A.UMESHA; B. SANNAPPA

Volume : IV, Issue : XII, December - 2015

EFFICACY OF ORGANIC BASED NUTRIENTS ON MULBERRY IN THREE TYPES OF SOILS DURING DIFFERENT SEASONS IN RELATION TO REARING PERFORMANCE OF DOUBLE HYBRID SILKWORM (BOMBYX MORI L.)

A. Umesha, B. Sannappa

Abstract :

<p>Studies were conducted to know the efficacy of organic based nutrients on mulberry in three types of soils (sandy clay loam, clay and red loamy) under varied seasons (monsoon, winter and summer) to record the re� performance of double hyid silkworm (CSR6 x CSR26) x (CSR2 x CSR27) in farmers&rsquo; re� houses of Challakere, Hiriyur and Molakalmur taluks of Chitradurga district of Karnataka state during 2013&ndash;14 and 2014&ndash;15. The pooled data of two years on re�, cocoon and post&ndash;cocoon parameters were statistically analyzed at p &le; 0.05 and p &le; 0.01. The results of the investigation revealed that, re� (matured larval weight, total larval duration effective rate of re� and cocoon yield), cocoon (cocoon weight, shell weight and shell ratio) and post&ndash;cocoon ( filament length and denier) parameters were significantly superior in the batches of silkworms that were fed on the leaves of mulberry plots supplied with vermicompost (Equivalent to 50 % of Rec. FYM) + FYM (50% of Rec. FYM) + N&ndash;biofertilizer + P&ndash;biofertilizer + 200N + 110P + 140 K kg/ha/yr followed by sheep manure (Equivalent to 50% of Rec. FYM) + FYM (50 % of Rec. FYM) + N&ndash;biofertilizer + P&ndash;biofertilizer + 200N + 110P + 140 K kg/ha/yr in red loamy soil during winter season. However, these parameters were significantly inferior in control batches Rec. FYM (20MT/ha/yr) + 350N + 140P + 140K kg/ha/yr in clay soil during summer season.</p>