Browsing by Author "Kannan, C."
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Item Crop diversification in arecanut plantation through intercropping of medicinal and aromatic plants(2006) Sujatha, S.; Ravi Bhat; Balasimha, D.; Kannan, C.The experiment was conducted in 2004 to 2006 in 18 year old arecanut plantation at Central Plantation Crops Research Institute, Regional Station, Villal, Kamataka. with intercropping of medicinal plants like Shatavari (Asparagus racemosus). Vetiver (Vetilcrzizanoides), Long pepper (Piper longum), Brahmi (Bacopa monllieri). Nilagirianthus ciliatus. periwinkle (Catharanthus roSCllS), Aloe (Aloe vera or barbadensis), Aswagandha (WithalJia sonUlifera), senna (Cassia anguistifolia) and safed musH (ChlorophytulIl borivillial1l1m) and aromatic plants like lemon grass (Cymbopogon jle_tIlOlls). Palmarosa (Cymbopogoll marrillii), Basil (Ocimlllll basilicum). Davana (Artemisia pallens) and Patchouli (Pogostemon cablin) and geranium. All the medicinal and aromatic plants tried in arecanut plantation except senna, safed musli and geranium performed better. Shatavari produced fresh root yield of 14.3 tlha of arecanut garden and contributed maximum chali equivalent yield (2045 kg ha·l ). The net return accrued by intercropping of shatavari per ha of arecanut plantation was highest (Rs. 80,000) followed by Nilagirianthus ciliatus (Rs. 42.000) bramhi (Rs. 39.380) and vetiver (Rs. 31,000). Aromatic plants like lemon grass. patchouli, davana, palmarosa and basil performed better with chali equivalent varying between 406 kg ha·l in case of basil to 1286 kg hal in lemon grass. All medicinal and aromatic crops contributed to productivity increase of 10.7% in basil to 53% in shatavari in terms of chali equivalent per hectare of arecanut garden. Aromatic plants like lemon grass, patchouli davana and palmarosa found highly profitable with net returns of Rs. 22700·58387 per hectare of arecanut plantation. In terms of net profit per rupee investment, all medicinal and aromatic plants were found superiorItem Impact of intercropping of medicinal and aromatic plants with organic farming approach on resource use efficiency in arecanut (Areca catechu L.) plantation in India(2011) Sujatha, S.; Ravi Bhat; Kannan, C.; Balasimha, D.The present investigation was conducted at Vittal, Karnataka, India during 2004–2007 to study the feasibility of intercropping of medicinal and aromatic plants (MAPs) in arecanut plantation. The results revealed that MAPs can be successfully grown as intercrops in arecanut plantation with increased productivity and net income per unit area. Kernel equivalent yield of MAPs varied between 272 kg ha−1 in case of Piper longum to 1218 kg ha−1 in Cymbopogon flexuosus. Pooled data indicated that Asparagus racemosus produced fresh root yield of 10,666 kg ha−1 of arecanut plantation and contributed to maximum kernel equivalent yield of 1524 kg ha−1 among all medicinal and aromatic plants. Intercropping of MAPs in arecanut was found economical. The net return per rupee investment was highest in C. flexuosus (4.25) followed by Bacopa monnieri (3.64), Ocimum basilicum (3.46) and Artemisia pallens (3.12). The total system productivity of arecanut +MAPs intercropping system varied from 2990 to 4144 kg ha−1. Arecanut + O. basilicum intercropping system registered significantly higher production efficiency 8.2 kg ha−1 day−1 than other systems. Intercropping of MAPs had more positive effect on soil pH in arecanut based cropping system. The soil pH was 5.6 in 2004 and it was 0.3–0.9 units higher in 2007. Soil organic carbon (SOC) content varied significantly due to intercropping of MAPs at the end of experiment. The SOC content increased in Aloe vera, A. pallens, P. longum and B. monnieri, while it depleted in grasses and rhizomatic MAPs. Based on demand and marketing opportunities for MAPs, farmers are advised to grow aromatic plants in large areas on a community basis to meet huge industrial demand and variety of medicinal crops in small areas to meet the requirement of traditional systems of medicine.Item Preliminary studies on wilt disease complex in cocoa(2006) Kannan, C.; Subaharan, K.The wilt disease complex ofcocoa was first noticed in India in 1998. in Karnataka. The leaves became yellow or brown, branches wilted and finally the plant died. Pods of the affected trees did not show any external symptoms, but shrivelled slowly leading to the death of the trees. The affected plants were consistently associated with Xylosandrus beetles which inhabited short pin hole borings made by them. Several fungi were found associated with the disease of which Ceratocystis sp.? was found to be consistently present. Pathogenicity trials with inoculation of Ceratocystis sp.? by wound inoculation-cotton plugging method produced internal symptoms of wilt in the seedlings. Field trials with systemic chemicals showed that the diseased plants recovered when Propiconazole @ 0.2 %, and Imidacloprid @ 0.2 % were used simultaneously as whole plant drenching. The incidence of fresh infection was Jess when compared with the other treatments.Item Yield loss due to fruit rot (Mahali) disease of arecanut in Karnataka(2000) Jose, C.T.; Balasimha, D.; Kannan, C.