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Howrelia J.H.,P.A. College | Patnaik B.B.,Central Sericultura Research and Training Institute | Selvanayagam M.,P.A. College | Rajakumar S.,Regional Sericultural Research Station
Journal of Environmental Biology | Year: 2011

The present study investigated the effect of increasing temperature stress on the thermotolerance of B. moricross-breed PM x CSR2 and tissue specific differential expression of heat shock proteins at IVth and Vth instars. The larvae reared at 25 ± 1°C and 70 ± 5% relative humidity were treated as control. Larvae were subjected to heat shock temperatures of 34, 38 and 42°C for 3 hr followed by 3 hr recovery. Expression of Heat shock protein 72 were analyzed by SDS-PAGE and confirmed by western blotting analysis. The impact of heat shock on commercial traits of cocoons was analyzed by following different strategies in terms of acquired thermotolerance over control. Resistance to heat shock was increased as larval development proceeds and increased thermotolerance is achieved with the induction of Heat shock protein 72 in the Vth instar larval haemolymph. Relative influence of heat shock temperatures on commercial traits corresponding to the generation of heat shock protein 72 was significantly improved over control. In PM x CSR2, cocoon and shell weight significantly increased to 9.90 and 11.90% over control respectively. © 2011 Triveni Enterprises. Source

Krishnamoorthy T.S.,Silkworm Seed Production Center | Radhakrishnan S.,Regional Sericultural Research Station
Indian Journal of Sericulture | Year: 2012

The study was conducted in Udumalpet and Krishnagiri areas in Tamil Nadu to measure the level of knowledge and adoption of new sericulture technologies and also to find out the extent of the association of the socio-economic characteristics of the small mulberry farm size holders in determining the level of knowledge and adoption. The knowledge and adoption level in Udumalpet was found to be higher when compared to the same in Krishnagiri as evident from the knowledge and adoption indices worked out. The knowledge and adoption indices in Udumalpet were to an extent of 88.5% and 77.2% and the same in Krishnagiri were to an extent of 72.0 % and 54.7% respectively. The variables scientific orientation, extension contact and extension participation in Udumalpet and in Krishnagiri cocoon yield, extension participation, mass media participation and social participation were found to have positive and significant relationship with the knowledge. In Udumalpet the variables such as dfls consumption, cocoon yield/acre/year, income, training scientific orientation, and mass media participation were found to have positively significant and experience was found to have highly significant relationship with adoption. In Krishnagiri cocoon yield/acre/year, extension participation, mass media participation and social participation were found to have positive and significant relationship with knowledge and training alone was found to have positive and significant relationship with the adoption. The main constraints faced by the sample fanners were lack of full awareness, high cost and non-availability of quality in-puts, labour intensiveness of the technology and uncertainty in crop success. Source

Sakthivel N.,Research Extension Center | Balakrishna R.,Regional Sericultural Research Station | Qadri S.M.H.,Central Sericultural Research and Training Institute
Journal of Biopesticides | Year: 2011

Comparative efficacy of user friendly water jetting technique by diverting a portion of irrigation water through a garden hose and chemical measures [0.1 % dichlorvos (76EC) / 0.05% dimethoate (30 EC)] practised by farmers against the major sucking pests of mulberry was studied. Two treatments with water jetting at 15 and 25 days after pruning (DAP) of mulberry plants was more effective in control of papaya mealybug than all concurrent chemical measures viz. two sprays of dichlorvos, dichlorvos followed by dimethoate, dimethoate followed by dichlorvos and two sprays of dimethoate. Against spiralling whitefly and jassid water jetting exhibited at par results with two sprays of dimethoate and dimethoate followed by dichlorvos but superior to the rest of the chemical measures. But against thrips, it was recorded lower efficacy than two sprays of dimethoate and dimethoate followed by dichlorvos, at par with dichlorvos followed by dimethoate and better than two spray of dichlorvos. Water jetting in mulberry garden showed slight or no deleterious effect on predatory coccinellids and spiders whereas there was drastic reduction in their population on chemical measures. However, the additional treatment of water jetting a third time at 35 DAP supported to reduce the population of all sucking pests in a greater extent constantly till 45 DAP and the highest population of natural enemies in the water jetted plots also worked to keep the pest population reduced which resulted in higher leaf yield and economy than all chemical measures. © JBiopest. 270. Source

Bindroo B.B.,Regional Sericultural Research Station
Indian Silk | Year: 2010

The indoor rearing of muga silkworm under controlled conditions exhibits good profits in certain economic characters with a marked reduction in the worm mortality. The technique implies the brushing of newly hatched muga worms on the leaves of the potted Som/Soalu plants or twigs in the polythene or polypaper bags kept indoors at the prevailing temperature and humidity regimes. The worms are then allowed to feed on the leaves across progressive growth stages. The replenishment of feed is carried at regular intervals after every consumption upto 3d stage of worms when ultimately they are shifted for feeding outdoors on the field plantations for progression of late age rearing with consequent mounting of ripened worms on Jails kept indoors to spin cocoons. The domestication of muga silkworms through more improvised indoor rearing practices needs due attention and exploration. Source

Bhatia N.K.,Regional Sericultural Research Station | Yousuf M.,Forest Research Institute
Annals of Forest Research | Year: 2013

With regard to forest management, rural livelihood, and poverty in India, it is often debated that JFM regime is not delivering livelihood functions of the forests to their dependents. This paper examines the state and scale of two decades old people-centric JFM system of India, and analyses the reasons with their indicators to shade offits shine in reducing poverty among forest dependent people in several parts of the country. Paper also discuss, how and to what extent, adoption of a multi-agency linked Collaborative Forest Management (CFM) system could be a better strategy over JFM regime to reassure delivery of livelihood functions of the forests to their dependents in rural India. Arguments in this communication are intended to provide forest managers and policy-makers with necessary input to consider some location specific forest based entrepreneurial activities in CFM mode to provide a continuous source of small income to forest dependent people to ensure long lasting success of their forest management endeavours. Paper concludes with a recommendation to convert unviable JFM areas of India into a multiagency linked CFM system in a phased manner. Source

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