It is confirmed that spcsv enhances the accumulation of spfmv. A manual on the most important pests and diseases of the major food crops grown by smallholder farmers in africa. Sweet potatoes may be affected by several diseases and insects which can be carried on roots or slips. High quality tubers are best produced on fertile, well drained, sandy loams. Use only certified seed sweet potatoes to produce plants or purchase inspected plants. Potato diseases are caused by fungi, bacteria, viruses, mycoplasmas, a viroid, nematode m. This is the simplest way to prevent the diseases scurf or black rot from infecting your sweet potatoes. They may include deficiencies or excesses in the diet, obesity and eating disorders, and chronic diseases such as cardiovascular disease, hypertension, cancer, and diabetes mellitus. Farmers practices and their knowledge of biotic constraints to. Pdf some disease management practices for bacterial wilt of. Soft rot can cause heavy losses in stored potatoes if not properly managed, creating a perception of poor quality in export seed potato markets. Nutritional disease, any of the nutrientrelated diseases and conditions that cause illness in humans.
Unit 1 where do sweetpotato pests and diseases come from and how do. The potato crop, once the haulm meets in the rows, is. The crop is sensitive to drought at tuber initiation stage 5060 days after planting. Crops grown in heavy clay loams produce irregular shaped tubers. Agriculture, the states seed potatoes are prized because growing areas are somewhat isolated from airborne spores of diseases such as late blight. Sweet potatoes need a loamy soil with a ph between 5. It is also not tolerant to water logging which can cause tuber rot. Curl grub white grub, cane grub, peanut scarab heteronyx spp. Disease and pest tolerance tuber characteristics skin colour, flesh colour and tuber shape purpose table or processing potato can be grown from true potato seed tps, plantlets or tubers.
Field and storage diseases of sweet potatoes auburn university. Most common larvae are mainly active during winter and spring. Sweet potato diseases and pests, description, uses. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Potato diseases and pests, symptoms, control methods. Sweet potato has gained prominence due to its ability to adapt to wide production ecologies and yield response to minimal external inputs. These spots enlarge and merge together, sometimes covering most of the tuber. If kept at room temperature, sweet potatoes should be used within a week.
Information on black leg x bacterial soft rots, which affect potato, lettuce, sweetpotato, tomato, capsicum, avocado and banana. At the end of the growing season remove all traces of your potato plants from the top and below soil even if they have no pests or diseases. If a grower saves seed from his own crop, he should be. Ppt potato diseases powerpoint presentation free to. This is a list of diseases and disorders found in potatoes bacterial diseases. However, the sweet potato value chain spvc is not welldeveloped in many producing countries.
Estimated removal of nutrients from the soil by sweet potato crops of. Rhizopus soft rot of sweetpotato scot nelson department of plant and environmental protection sciences t he sweetpotato is a very important local food in hawaii and a multimillion dollar export crop for the state. For instance, sweet potatoes and yams are not on the nightshade vegetables list. Bacterial spot is a serious disease affecting many fruit and vegetable crops and is capable of surviving on weeds and nearby host crops. Sweetpotato ipomea batatans is a food crop of global significance. Some carbs may have a bad rep, but these taters are made of complex carbohydrates a. Plant diseases were the third most important sweetpotato production. If you use a potato dust or spray, read and follow the directions carefully. This disease is caused by a strain of the fungus fusarium oxysporum, which only infects sweet potato. These are chemical mixtures that prevent some diseases such as late blight.
Strategic plan for pest management research and education in southern sweet. Fungal diseases alternaria leaf spot and stem blight alternaria spp. Anthracnose verification needed colletotrichum coccodes. Global sweet potato market research report industry.
Phenolic compounds in the potato and its byproducts. They thwart some pests, too, such as the colorado potato beetle. They may proliferate and merge to form irregular patches of. Sweetpotato pests and diseases international potato center. Whether you decide to plant in beds or in grow bags, choose a spot that provides fullsunlight for most of the day. Weed control in potatoes prepared for the british potato council crop protection treater group by dr ken davies, sac and checked by mark ballingall, sac, and the key product manufacturers. Sweet potatoes are one of the most important vegetable crops produced in. The report gives a complete market analysis for the forecasted period from 2020 to 2026. The sweet potato became a favorite food item of the french and spanish settlers and thus continued a long history of cultivation in louisiana. Among them, the diseases caused by viruses are of worldwide economic importance.
Most farmers are likely to want to combine a variety of different pest management practices. Pathogenic bacteria, although not very common, are responsible for important economic losses. Use of tubers is the best method for potato production. Resistance to sweet potato virus disease is one of the major breeding objectives since sweet potato virus disease is the major sweet potato disease in east africa 15,18. Sweet potato crop profile a production overview for sweet potatoes within the state of north carolina including general production information, production practices, worker activities, chemical and nonchemical control of insects, diseases and weeds. Tubers can have a distinctive sweet smell and ooze a.
To be effective, most standard dusts must be applied to the potato foliage every 7 to 10 days. Whilst these are generally well controlled in developed countries using approaches such as clean planting material and monitoring with pheromone traps to guide insecticide use, research into methods suitable for developing countries has. Indias glaxo and smithkline to merge by december 2001 following the global merger of glaxowellcome with smithkline beecham in. Learn how to grow sweet potatoes in your backyards, pots, commercially and earn a big profit from it. The symptoms are sever stunting of infected plants, stunting, distorted and chlorotic mottle or vein clearing of the leaves. Cab direct platform is the most thorough and extensive source of reference in the applied life sciences, incorporating the leading bibliographic databases cab abstracts and global health. Extending control of sweet potato diseases in east africa.
Various methods can be used to harvest sweet potatoes. Table 4 important sweet potato diseases and their control 21. In this article also learn about planting sweet potatoes, methods, spacing, propagation along with how to harvest sweet potatoes. However, in hot spot areas, they are affected by sweet potato virus disease and the root yield is highly affected, 14.
However, fungi, bacteria, viruses, nematodes and phytoplasma are known to attack sweet potato. It is important to catch any disease early, before it spreads to all of your tomato plants and possibly other plants in the same family, such as potatoes, eggplants, and peppers. At harvest, select tubers from plants that show no symptoms of little leaf disease or viruses. Az list horticultural diseases and disorders department. But for all the others in the potato family, its hard to believe they could be dangerous. Nematode damage can also increase susceptibility to certain fungal diseases in sweetpotato such as fusarium, as well as promote secondary infections resulting in rot. If potatoes are grown on the same land season after season this will also encourage pest and disease. Phenolic compounds are synthetized by the potato plant as a protection response from bacteria, fungi, viruses, and insects. Rhizopus soft rot of sweetpotato ctahr website home. Russet crack disease of sweet potatoes california agriculture. To protect this industry, montana only allows potatoes that originate in montana to be grown as certified seed, and requires all seed potatoes to be inspected at their shipping point. Sweet potato virus disease is a disease complex caused by two viruses. Sustainable potato production guidelines for developing countries during the international year of the potato, celebrated in 2008, fao and cip helped. Viruses are spread through infected planting material roots and vines and are also transmitted from plant to plant by aphids and white flies.
Tubers are inspected for soft rot under was certified seed potato scheme. The nursery bed should also be far away from other sweet potato fields and from the drainage water off sweet potato fields, so that leaf scab will not spread to it. Average nitrogen response showed a significant curvilinear response. Orangefleshed cultivars in particular have immense potential to improve household income and nutrition in subsaharan africa. Adults can cause minor damage by chewing on foliage. The sweet potato is suitable for growing in zones 311 as an annual, and zones 811 as a perennial.
Tomato diseases are rarely fatal if you take management steps in a timely manner. Symptoms include yellowing of older leaves followed by wilting, leaf drop, and stunting or dying of the plant. Because of the wide host range of root knot nematodes, weeds can also serve as hosts and provide a. The blackheart of potato is a disease that commonly found in storage.
Diseases and defects of potatoes poster ahdb potatoes. Click on a star rating to show your choice, please note you can only vote once. Selecting and storing sweet potatoes whats so great about sweet potatoes sweet potatoes are excellent sources of vitamin a, potassium, vitamin c and fiber sweet potatoes also contain niacin, folate. Sweetpotato feathery mottle virus and sweetpotato chlorotic stunt virus in combination is known as sweetpotato virus disease spvd. Pdf innovation opportunities in sweet potato production in kenya. Sweet potatoes are susceptible to a variety of field and storage diseases. Potatoes left in the ground will eventually rot causing pest and disease. Many diseases of irish and sweet potatoes can be prevented in the home. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. A medium sweet potato baked in its skin is only about 100 calories, making sweet potatoes an ideal food for weight management. Trap plants in fldds plantsd wlth various sweet potato cultlvars. The storage roots and foliage of crop are attacked by a wide range of pests and diseases. Sweet potato casserole is a side dish of mashed sweet potatoes in a casserole dish, topped with a brown sugar and pecan topping. Sweet potatoes university of the district of columbia.
Adult beetles emerge in late spring and summer, particularly after heavy rains. Sweet potato value chain analysis reveals opportunities. The report on the global sweet potato market gives an estimation of the development of the market based on historical studies and also provides forecasts on the basis of comprehensive research. Potato pest and disease management 82 potato and soil conservation 84 potato and water resources 86 potato. Specifically, the chapter describes the role of the sweet potato in human diets. Soft rot diseases of potatoes agriculture and food. A comprehensive list of nightshade vegetables gundry md.
Nonemergence of plants, wilting, browning of plant tissues, stem desiccation and plant death have all been linked to infection by soft rot bacteria. Diseases and pathogens of sweet potato and their management 65 viral diseases 66 sweetpotato feathery mottle virus spfmv aphidtransmitted potyvirus 66 page. Sweet potato weevils are the major destructive pest causing drastic yield decline and resulting in a decrease in millions of dollar annually. Diseases 80simple technique boosts chinas sweet potato harvest 81chemicals from cockroaches in fight against aids 81cardiff and guangdong universities.