Technical bulletin - Sweetpotato


Technical bulletin - Sweetpotato

Sweet potato is a staple nutritious food crop grown in the humid tropical and subtropical regions of the world. It is a dicotyledonous short duration crop (80-120 days) belonging to the family Convolvulaceae. The edible carbohydrate rich roots (tubers) are formed by the secondary thickening of the upper part of some feeder roots. Tubers with different colours such as white, purple, yellow and orange are available and are used either for human consumption or as animal feed. The country of origin is tropical America and spread to south Pacific. Sweet potato tubers are consumed as secondary staples in developing countries after cereals, potato and cassava. It is eaten either as raw or boiled and locally marketed in unprocessed form. The tubers are industrial raw materials for the production of flour and starch, which are used in noodles, pasta and bakery foods including the fried snacks. In some places, it is the mainstay of livestock production for pig and cow (vines and non marketable tubers). Young leaves and shoots are used as green vegetable.

Agro Advisories on Tuber Crops
Deluge of August 2018 in Kerala State, India: Changes in Soil Properties

The ICAR-CTCRI has taken up the responsibility of visiting the flood ravaged areas in all 14 districts of the state to have a realistic assessment of the loss of tuber crops, which is one of the most important groups of crops grown and relished by Keralites. A group of 28 scientists and technical officers of the Institute visited the flood ravaged areas in all 14 districts during 7-12 September 2018 and surveyed the extent of loss caused to different tuber crops. The ground truth data collated with secondary data available at Department of Agriculture, Village Office and Panchayat/Municipality/Corporation Office and a final analysis of the loss of different tuber crops and economic loss to farmers was done. In order to make the data presentable, thematic maps using GIS software were also prepared. This report presents the results of the detailed study with recommendations to rehabilitate the tuber crop farmers of Kerala.

Post-flood loss assessment and rehabilitation of tuber crops in Kerala

Report on 'Post-flood loss assessment and rehabilitation of tuber crops in Kerala', prepared based on detailed survey, data collection and analysis of flood affected areas in Kerala during 7-12 September 2018 by a team of 28 scientists and technical staff of the Institute.

Agro-Advisory Guide

Soil degradation with respect to nutrient depletion due to crop mining and anthropogenic interventions has affected the soil health. As a result, different kinds of nutritional disorders are becoming common in crop plants. Tropical tuber crops like cassava, sweet potato, yams and aroids are no exception to it as they are heavy feeders of nutrients due to their innate biological efficiency and high yield potential. This publication will help in identifying the nutrient related common deficiency, toxicity symptoms and their management in major tropical tuber crops like cassava, sweet potato, elephant foot yam, lesser yam and tannia. This user friendly technical guide will serve the purpose for the stake holders to whom it was intended.


CTCRI Vision 2050 provides an oppurtunity to evaluate the relevance of tropical tuber crops in food security by introspecting the accomplishment and visualizing the challenges this sector may face in future. It also critically examines possible scenario of operating environment vis-a-vis new opportunities and defines goals and targets of the Institute accordingly.


This booklet is one in a set of field guides prepared by the International Institute of Tropical Agriculture (IITA) to increase the technical knowledge of extension agents and enhance the integration of plant protection and plant production practices in farmers’ efforts to grow a healthy crop of cassava.


Annual Performance Evaluation Report of ICAR-Central Tuber Crops Research Institute for the year 2011-2012 is hereby recommended by the RFD Committee of the Institute. The Institute publishes its annual report every year giving the detailed report of the research projects handled by the Scientists. Detailed Report on the performance in the coordinated centres under the AICRP TC is also published separately.


Fried cassava chips presently available in the market are often too hard to bite and bear no comparison with the potato chips. This leads to poor acceptability of the product and lower price. Research at ICAR-CTCRI has shown that excellent quality fried chips can be made.


Roots and Tubers have critical roles to play in fulfilling the multifaceted needs of the people contributing to food security and poverty eradication. In this endeavor, research partnership, capacity building and policy support for these crops assume significance. Cassava has phenomenal biological potential. The vision for cassava is that it will spur rural industrial development and raise income for farmers, processors and traders besides satisfying the consumers. A National strategy is therefore called for Cassava- Production- Processing- Marketing continuum in specific agro-ecological zones


Research on tropical tuber crops is the primary mandate of ICAR-CTCRI. Each division CTCRI concentrate its research programmes on separate aspects of tuber crops. Crop improvement division focus its activities on collection germplasm of different tuber crops from different parts of the world and conserving it in field gene bank as well as in vitro. Development of new varieties of tuber crops with higher yield and other attributes suitable for industrial applications as well as for food purpose is another important activity of this division.


The Institute established in 1963 with its head quarters at Thiruvananthapuram, Kerala, has grown over the years into a premier research organization of international repute and become an ISO 9001 : 2008 Certified Institute since 31 March, 2014. In fact, we celebrated the Golden Jubilee of the institute during 9-12 July, 2013, where the entire global scientific fraternity working on tropical tuber crops participated. As a public institution, it is our paramount responsibility to keep informed our clientele farmers, entrepreneurs, industrialists, extension personnel, and policy makers about the latest achievements of the institute. To fulfill that commitment, a concise document on research progress and achievements made on other related activities of the institute during every year has been prepared and presented in it.

Title Year & Version Download Link
Research Highlights 2021
Research Highlights 2020
Research Highlights 2019
Research Highlights 2017
Research Highlights 2016
Research Highlights 2015
Research Highlights 2014
Research Highlights 2013

Our Vision is to Produce tuber, reduce hunger and improve livelihood of the poor.

Our Mission is to make Tropical Root and Tuber Crops as part of food and nutritional security for ever growing food-insecure population by increasing productivity and securing income, health and sustainability