Resistance management can be achieved by alternating several fungicides (with different active ingredients) within a crop’s season. Causal organism: Erysiphe phoygoni. Powdery mildew produces a white powdery coating on the surface of plant leaves and fruits and causes plants to become distorted, look unsightly and growth to die back. The patches on the leaves originate in the form of minute discoloured specks from which powdery mass radiates on all sides. Before publishing your Article on this site, please read the following pages: 1. Let us know if you liked the post. Powdery mildew can be a very important disease when conditions are favorable. Theses spots enlarge and become covered with powdery fungal growth. Symptoms of Downy Mildew of Pea: Yellow to brown scattered patches of discoloured areas appear on the upper surface of the leaflets and stipules. Overhead sprinkling may help reduce powdery mildew because spores are washed off the crop. If you get mildew in your peas, for instance, it will only attack a narrow range of leguminous (pea-like) plants. Causal organism: Erysiphe phoygoni. Systemic fungicides, however, due to their single site mode of action, are prone to resistance development and the pathogen has the ability to develop resistance to these chemicals. Crops grown late are more likely to be affected by this disease than early sown crops, and when the disease is severe, the peas become stunted, turn yellow, and defoliate. Rotate with non-host crops such as potato, maize, wheat or other grains, Ensure proper spacing between plants for free air circulation, Plant crops in rainy seasons because there is less powdery mildew invasion. Symptoms consist of a light, greyish, powdery growth on the leaves, pods and occasionally on the stems. Erysiphe cichoracearum was formerly reported to be the primary causal organism throughout most of the world. The following fungicides are recommended for use in control and/or management of powdery mildew on peas; [ Placeholder content for popup link ] Theses spots enlarge and become covered with powdery … Our mission is to liberate knowledge. This powdery growth is easily rubbed off. Field Pea Diseases Review: Powdery Mildew: Importance. Greenlife Crop Protection Africa. Article Shared By. The initial symptoms consist of tiny slightly discoloured spots on the upper surface of leaves. These seeds develop an objectionable flavour which lowers the quality of the grains. Article Shared By. The disease then spreads to other green parts of the plant such as tendrils, pods, stems etc. It reduces seed size and can sharply reduce yields if it develops during early to mid-pod development. Preserving Your Articles for Eternity, Short essay on Powdery mildew of Peas (Erysiphe polygoni). If you get mildew in your peas, for instance, it will only attack a narrow range of leguminous (pea-like) plants. Producers of field peas may need to scout for powdery mildew this year. Late planted peas are at greater risk for yield loss than early planted peas. Powdery mildew of peas is a fungal disease caused by the fungus Erysiphe pisi. A leading agrochemicals, seeds and farm equipment’s company in Africa. When using a pesticide, always wear protective clothing and follow the instructions on the product label, e.g. However, this disease can also occur in early planted fields in South Dakota under the right environmental conditions and when the crop canopy is heavy. When the disease becomes severe, large areas on the aerial part of host are covered with the floury patches. Ultimately the disease is easily recognized by white powdery coating on all over the plant that contains enormous conidia produced by the fungus. Copyright 2020. pisi (powdery mildew of pea); field symptoms. 5. Severe pod infection can lead to poor seed quality and premature ripening may result in shrunken seeds. Symptoms of Powdery Mildew Disease: First symptoms appear on the leaves in the form of white floury patches on both sides of leaves. Privacy Policy ADVERTISEMENTS: The attack of pathogen Erysiphe polygoni is marked by minute discoloured patches from which a powdery mass radiates on all sides.