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Year Vol.
(Issue) Pages Author(s) Title

2002 25 78-87 R. S. Misra, M. Nedunchezhiyan, T. M. S. Swamy, S. Edison Mass multiplication techniques for producing quality planting material of Amorphophallus paeoniifolius (Dennst.) Nicolson (Araceae) (Buy)
ABSTRACT: Amorphophallus paeoniifolius (Dennst.) Nicolson (Araceae), commonly known as Elephant foot yam, is a high-potential tropical tuber crop. The tubers are a delicacy and rich in nutrients. In India, the cultivar 'Gajendra' is the most popular with non-acrid orange-colored flesh and with a yield potential of 50-60 Metric tons/hectare (tlha). This crop can be grown in other countries also where climatic conditions are suitable. In order to popularize this crop, a huge quantity of planting material is required. The planting material is either small whole tubers or bigger tubers cut into smaller pieces before planting. A large mass multiplication program to produce quality planting material of Elephant foot yam is in operation at our Centre. The mass multiplication techniques were improved and standardized. For commercial cultivation of Elephant foot yam, whole tubers of approximately 400-500 g size with plant to plant and row to row spacing of 90 X 90 cm, were found ideal. To obtain 400-500 g size whole tubers for commercial cultivation, cut tubers of approximately 50-100 g with a plant to plant and row to row spacing of 60 X 60 cm were found suitable for raising the crop for producing the planting material. Major diseases that collectively cause considerable damage to the crop, viz. Mosaic, collar rot, leaf blight and post harvest tuber rot, can be effectively checked by using disease-free planting material. Planting material used for raising the crop for the production of planting material for commercial crop should always be obtained from mosaic free crop and devoid of any post harvest spoilage. A fertilizer dose of 100:80:100 kg/ha of NPK was found to be optimum for raising the crop for commercial cultivation or for producing planting material. Preventive crop protection with two sprays of Mancozeb (0.02%) + Monocrotophos (0.05%) at 60 and 90 days after planting was found very effective. The crop raised for producing the planting material should be harvested only after full maturity and complete drying of the plants. Tuber yields of 30-40 t/ha can be obtained from the crop raised for producing the planting material whereas tuber yield of 50-60 t/ha can be obtained from commercial crop.

2003 26 42-53 R. S. Misra, S. Sriram, M. Nedunchezhiyan, C. Mohandas Field and storage diseases of Amorphophallus and their management (Buy)
ABSTRACT: Amorphophallus, commonly known as elephant foot yam or Suran is a dual-purpose aroid ideal for ornamental as well as cultivation purposes. While the plants of all species have ornamental value, tubers of some species are rich source of nutrition and a delicacy as food. Tubers and plants are also used in preparing indigenous medicines for various ailments. The amorphophallus crop has high production potential and market acceptability. Three major field diseases affect the plants; mosaic caused by virus, leaf blight/leaf rot by Phytophthora colocasiae and collar rot by Sclerotium rolfsii. Major field diseases of amorphophallus can be effectively controlled by using disease-free planting material, mulching with paddy straw/plant leaves/black polythene sheets and two preventive sprays with Mancozeb (0.2%) + Monocrotophos (0.05%) at 60 and 90 days after planting. The tubers are also prone to post-harvest damage as a result of infection by various fungi and bacteria coupled with nematode infestation. Tubers infested with Meloidogyne incognita are prone to post-harvest diseases caused by Sclerotium rolfsii, Botryodiplodia theobromae, Phytophthora co!ocasiae, Fusarium and Rhizopus species. A bacterial pathogen, Erwinia carotovora also causes serious soft rot decay of tubers. Storing the tubers by spreading them closely in single layer and covering with coarse dry sand in a cool and ventilated place, followed by periodic removal of damaged tubers/portions, if any, was found to be the best method of storage that allowed minimum decay and weight loss.

2005 28 174-190 R. S. Misra, M. Nedunchezhiyan, G. Suja Commercially cultivated edible aroids in India (Buy)
ABSTRACT: Members of the aroid family are important food sources in all parts of the tropics and subtropics, with the potential to increase production to even greater levels. The genera of greatest importance are Colocasia, Xanthosoma, Amorphophallus, Alocasia and Cyrtosperma. These genera .are described, together with the situation regarding their cultivation and use in the Indian subcontinent.

2008 31 125-128 M. Sankaran, N. P. Singh, M. Nedunchezhiyan, B. Santhosh, Chander Datt Amorphophallus muelleri Blume (Araceae): An edible species of elephant foot yam in tribal areas of Tripura (Buy)
ABSTRACT: Tripura has a warm and humid Subtropical climate with three distinct seasons; summer, monsoon and winter. Rice is the staple crop but many other foodstuffs are cultivated or collected from the wild. The number includes numerous aroids. Two elephant foot yams are widely used, but their identity had not previously been established. This paper describes A. muelleri Blume, A. paeoniijolius (Dennst.) Nicholson and indigenous tribal knowledge (ITK) in the utilization of A. muelleri as food and medicine.

2008 31 129-133 M. Nedunchezhiyan, R. S. Misra Amorphophallus tubers invaded by Cynodon dactylon (Buy)
ABSTRACT: Amorphophallus paeoniifolius tubers are rich in starch and are consumed as vegetables after boiling or baking. Cynodon dactylon (Bermudagrass) a common weed in cultivated as well as non-cultivated fields was found invading on the underground tubers during dry season. It was found that Cynodon dactylon injected needle-sharp root-like runners produced at the nodes into the tubers. In some tubers Cynodon dactylon root-like runners entered inside up to 15 em depth. Necrotic lesions were developed in the infected tubers around the Cynodon dactylon rootlike runners. The dry matter content of Cynodon-infested tubers was decreased due to decrease of starch and total sugars. The anti-nutritional factor, oxalic acid content, was increased in Cynodon-infested tubers. Cynodon dactylon rendered Amorpbopballus tubers unfit for human consumption.

2012 35 132-143 M. Nedunchezhiyan, S.K. Jata, A. Mukherjee, R. S. Misra Sprout Bud Culture: A Rapid Multiplication Technique for Elephant Foot Yam (Amorphophallus paeoniifolius [Dennst.] Nicolson) Propagation (Buy)
ABSTRACT: Sprout bud culture experiments for economic and rapid multiplication on elephant foot yam (Amorphophallus paeoniifolius [Dennst.] Nicolson) were conducted from 2009 to 2010 at Regional Centre of Central Tuber Crops Research Institute, Dumuduma, Bhubaneswar, India. Sprout buds 2.5–3.0 cm diameter with root initials on the buds along with 0.5–1.0 cm length mother corm below the sprout buds could be successfully used as planting material. Such sprouts were initially planted in plastic cups filled with pot mixture. After shoot and root development within 15 days of planting, they could be transplanted into the main field. Maximum sprout induction and sprout harvesting (.2.5 cm diameter) could be achieved by soaking the corms in 400 ppm thiourea solution for 30 min at 15 days interval and could be kept under white polyethylene sheet cover. From a corm size of 500 6 25 g, maximum 19 sprouts each of more than 2.5 cm diameter could be harvested within 16 weeks time. The remaining portion of the corm can also be used as planting material. Thus, propagation ratio of elephant foot yam could be increased 19 timeswithin 16weeks. The transplanted sprout buds (10–12 g) produced 320 g corms with the best agronomic management practices.

2013 36 136-145 M. Nedunchezhiyan, M. Sankaran Cormels and Minicorm Sett Techniques for Seed Corm Production in Amorphophallus (Buy)
ABSTRACT: Amorphophallus paeoniifolius is a widely grown food crop in the Indian subcontinent, Southeast Asia and China. The crop is grown by planting corms or corm segments, with whole corms of 500–750 g weight the preferred material. A shortage of planting material of this size is a constraint for commercial cultivation and increasing maximum food production. Research is reported on methods of producing corms of this size from cormels and planting setts. Results differ regionally and optimum combinations in plant spacing and fertilization have been developed to account for varying soil and climatic conditions.