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posted Mar 4, 2011, 8:09 AM by rajesh gk


Effect of VAM fungi and bacterial biofertilizers on mulberry leaf quality and silkworm cocoon characters under semiarid conditions


Ram Rao, D.M*, Kodandaramaiah, J., Reddy, M.P., Katiyar, R.S., Rahmathulla, V.K.,


Caspian J. Env. Sci., 5, 111-117. ( 2007 )


The influence of VAM fungi and bacterial biofertilizer (BBF) with 50% reduction in the recommended dose of (N and P) chemical fertilizers on leaf quality traits of mulberry variety (S-13) and its impact on silkworm (PM ? NB4D2) growth and cocoon characters were studied under semi-arid conditions. Four different treatments were imposed i.e., T1: Control (only 100% NPK); T2: VAM (50% cut in P); T3: BBF (50% cut in N) and T4: BBF and VAM (50% cut in N and P). The results revealed that reduction (50%) in the dose of chemical fertilizers in T2, T3 and T4 did not affected the leaf quality traits or cocoon parameters, this may be due to the effect of microbial inoculants in these treatments, which had efficiently regulated the normal growth, metabolism and physiological activity in plants. Among the three-biofertilizer treatments, leaf quality, silkworm growth and cocoon parameters were found improved in T4 and was on par with T1 control. The dual inoculation (T4) proved economical and beneficial with regard to saving of 50 % cost of chemical fertilizers and improvement in soil fertility, leaf quality and cocoon parameters, thus this technology can be recommended to sericulture


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posted Jul 9, 2010, 9:04 AM by rajesh gk


[Influence of mulberry cultivars Morus spp. on the production and quality of silkworm Bombyx mori L. (Lepidoptera: Bombycidae) cocoons]

[Article in Portuguese] Free Article


Meneguim AM, Lovato L, da Silva RZ, Yamaoka RS, Nagashima GT, Pasini A.

Instituto Agronómico do Paraná, Londrina, PR, 86001-970.


Neotrop Entomol. 2007 Sep-Oct;36(5):670-4.


The success of sericiculture greatly depends on the availability of mulberry cultivars with agronomic characteristics that maximize the production and quality of silkworm, Bombyx mori L., cocoons. The effect of the cultivars Miura (standard) and Korin, and the hybrids SM 14, SM 63, SK 1, SK 4 and FM 86 was evaluated on silkworm development, and on cocoon production and quality, at the Instituto Agronômico do Paraná, IAPAR, in Londrina, PR, Brazil (23 +/- 3 degrees C; 61 +/- 8% RH). The experiment was arranged in a randomized block design with four replicates. Larvae feeding either on 'SK 4' or on 'Korin' showed a higher weight compared to that of larvae feeding on 'Miura'. Cocoon weight (both sexes) and pupae weight (male) obtained with larvae fed on SK 4 were higher compared with that of insects that fed on Miura; there was no difference among the remaining treatments. Silk net weight was independent of the cultivar used. Cocoon shell weight was similar amongst insects raised on 'Miura' and on the other mulberry materials. The percentage of cocoon spinning was higher than 90% in all treatments, with the spinning concentrating in the first two days. The proportion of first grade cocoons varied from 80% (SK4) to 90%. The results obtained with the studied cultivars were either similar or superior to that of the standard cultivar Miura with emphasis to 'SK 4', thus showing the potential use of these cultivars in sericulture in the state of Paraná.

Citation PMID: 18060291 [PubMed - indexed for MEDLINE]

Mulberry Agronomy

posted Jul 4, 2010, 5:47 AM by rajesh gk   [ updated Jul 4, 2010, 6:03 AM ]

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