80+ Vectors, Stock Photos & PSD files. COWPEA: Post-harvest Operations Page 4 Fig. Definition of Cowpea plant. ... tropical cowpea Vigna lasiocarpa . Most gardeners plant cowpea seeds directly outdoors, once the danger of frost has passed. Now it is a broadly adapted and highly variable crop, cultivated around the world primarily as a pulse, but also as a vegetable (both for the greens and the green peas), a cover crop, and for fodder. Cowpea grows in bush, vine, tall and short varieties. Water seeds well to speed up germination. Taxonomy of Cowpea: Most nomenclature problems in the cultivated cowpeas and related wild species have been resolved to great extent. flower of vigna unguiculata plant (azuki bean) - cowpea stock pictures, royalty-free photos & images. The leaves of the cowpea plant are edible when they’re young, but most gardeners grow them for the pea. beans diagonals - cowpea stock pictures, royalty-free photos & images. Whole plant: systemic infection, colonization of xylem vessels resulting in chlorosis, die back, dwarfing. Next. beans diagonals - cowpea stock pictures, royalty-free photos & images. Do not plant cowpea seeds in the same spot in the garden more than once every four years. Fresh Cowpeas are a high source of Zinc. The symptoms . of . asian boy in the cowpeas field - cowpea stock pictures, royalty-free photos & images flower of vigna unguiculata plant (azuki bean) - cowpea stock pictures, royalty-free photos & images … (Vigna unguiculata), commonly known as carob, string bean, with beans, beans. The cowpea is an annual herbaceous legume from the genus Vigna. flower of vigna unguiculata plant (azuki bean) - cowpea stock pictures, royalty-free photos & images. The black-eyed pea or black-eyed bean is a legume grown around the world for its medium-sized, edible bean.It is a subspecies of the cowpea, an Old World plant domesticated in Africa, and is sometimes simply called a cowpea.. a cowpea plant. Cosmopolitan. Its long, slender pods are filled with a prolific number of seeds. Time of Planting. And zinc is known to aid in the Thyroid function. Geographic distribution. Add to Likebox #131700500 - Kidenry beans: Closeup view of uncooked red kidney beans. Learn more about your crops in our library, Learn about ways to keep your crops healthy, Cowpea may also be referred to as 'black-eyed pea', Tan to brown sunken lesions on leaves; lesions merging to girdle stems and petioles; lesions may become covered in pink spore masses during periods of wet weather, Disease causes economically important losses to crops in Africa, Latin America and Asia, Severe defoliation of plants; extensive lesions on stems and pods; if infection is severe then plants may be killed, Major disease in Africa; disease transmitted by infected seed and from infected plant debris; secondary spread by rain splash and wind, Raised brown to black pustules on both sides of leaves; wilting plants; drying leaves dropping from plant, Major disease in parts of West Africa and in areas of medium elevation in East Africa, Chlorotic spots on upper surfaces of leaves; necrotic spots on leaves; masses of spores on lesions which resemble black mats on lower leaf surface; defoliation of plants; yellowing of leaves; circular, red lesions on leaves, Pseudospora an important disease in China; both diseases occur in Africa, Discoloration of stem at soil line; cankers on stem may spread upwards; leaves may wilt and drop from plant; numerous small black sclerota (fungal fruiting bodies) develop in affected tissues and can be used to diagnose the disease, Fungus had a wide host range and affects beans, tobacco, soybean, pigeon pea and many other crops; disease is primarily spread via microsclerota in the soil, Stunted plant growth; yellowing, necrotic basal leaves; brown-red or black streaks on roots that coalesce as they mature; lesions may spread above the soil line, Damage caused by the emergence of the disease is worsened by warm, compacted soils, limited soil moisture and poor soil fertility, White powdery fungal growth on upper surfaces of leaves; chlorotic or brown patches on leaves; leaves dropping from plant, Water-soaked sunken, red-brown lesions on hypocotyls (germinating shoot below seed leaves) and epicotyls (shoot above seed leaves); small, circular brown spots on leaves; large irregular lesions with zonate banding on leaves; lesions with water-soaked borders; leaves that look like they are covered in sand (sclerotia), Sudden wilting of leaves; yellowing foliage; browning stem above and below soil; browning branches; stem may be covered with fan-like mycelial mat, Fungus can survive in soil for long periods; disease emergence favored by high temperatures, high humidity and acidic soil; disease found mainly in tropical and subtropical regions, including the southern United States, Water-soaked spots on leaves which enlarge and become necrotic; spots may be surrounded by a zone of yellow discoloration; lesions coalesce and give plant a burned appearance; leaves that die remain attached to plant; circular, sunken, red-brown lesion may be present on pods; pod lesions may ooze during humid conditions, Disease can be introduced by contaminated seed; bacteria overwinters in crop debris; disease emergence favored by warm temperatures; spread is greatest during humid, wet weather conditions, Seeds not germinating; death of seedlings; post emergence symptoms include sunken oval lesions on stems, red-brown lesions on leaves, flowers aborting and/or mummified pods; severe defoliation can occur during prolonged periods of wet weather, Disease particularly important in rainforest zone, southern Guinea savannas and the southernmost part of northern Guinea savannas, Gary to green water-soaked rot girdling stem; plant death; white mycelial growth on stem during high humidity, Important in warm, humid tropical conditions of southern Guinea, West Central Africa and subtropical India, Small soft bodied insects on underside of leaves and/or stems of plant; usually green or yellow in color, but may be pink, brown, red or black depending on species and host plant; if aphid infestation is heavy it may cause leaves to yellow and/or distorted, necrotic spots on leaves and/or stunted shoots; aphids secrete a sticky, sugary substance called honeydew which encourages the growth of sooty mold on the plants, Distinguishing features include the presence of cornicles (tubular structures) which project backwards from the body of the aphid; will generally not move very quickly when disturbed, Singular, or closely grouped circular to irregularly shaped holes in foliage; heavy feeding by young larvae leads to skeletonized leaves; shallow, dry wounds on fruit; egg clusters of 50-150 eggs may be present on the leaves; egg clusters are covered in a whitish scale which gives the cluster a cottony or fuzzy appearance; young larvae are pale green to yellow in color while older larvae are generally darker green with a dark and light line running along the side of their body and a pink or yellow underside, Insect can go through 3–5 generations a year, Larvae damage leaves, buds, flowers, pods and beans; young caterpillars are cream-white in color with a black head and black hairs; older larvae may be yellow-green to almost black in color with fine white lines along their body and black spots at the base of hairs; eggs are laid singly on both upper and lower leaf surfaces and are initially creamy white but develop a brown-red ring after 24 hours and darken prior to hatching, Adult insect is a pale green to tan, medium sized moth; insect is also very damaging pests of corn; insect overwinters as pupae in the soil, Irregular patches of feeding damage on underside of leaves which causes the top surface of the leaf to dry out, giving the leaves a lacy appearance; insect will also damage flowers and small pods; pods may be damaged so badly that they drop from the plant; adult insect is an orange-brown beetle with black spots; larvae are fat-bodied grubs which taper at the end and are in rows of conspicuous spines, Beetles can decimate bean crops; beetles overwinter as adults and undergo 2-3 generations per year, Galls on roots which can be up to 3.3 cm (1 in) in diameter but are usually smaller; reduction in plant vigor; yellowing plants which wilt in hot weather, Galls can appear as quickly as a month prior to planting; nematodes prefer sandy soils and damage in areas of field or garden with this type of soil is most likely, Links will be auto-linked. 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