Powdery mildew of pea
Name of the disease
Powdery mildew
- The scientific name
Erysiphe pisi
- Type of disease Family of disease
Type: fungal
Disease family: Erysiphaceae
- Symptoms of powdery mildew on peas
Symptoms first begin to appear on the surfaces of the stems and lower leaves of the plant in the form of small white spots from fungal growths and spores. These spots can be easily wiped off by hand. The infection spreads quickly to cover a large part of the plant (stems, leaves, stems, pods). The tissue under the affected areas can turn purple. Injury may result Early During the season, plants cause poor growth and stunting, and a decrease in seed production and poor quality. The seeds can also take on a brownish-gray color if the pods are severely infested.
- Causes of powdery mildew on peas
Fungus spores remain inside leaf buds and plant debris that can be damaged by wind and water And insects Transferring spores to nearby plants. Although the Powdery mildew A fungus, but it can grow well in dry climates. The fungus can survive at temperatures between 10 and 12 C, but the optimal temperature is 30 C. In contrast to downy mildew, small amounts of rain or regular morning dew can accelerate the spread of powdery mildew.
- Suitable conditions for the spread of powdery mildew on peas
A high humidity of 80% and a temperature of 25°C are suitable conditions for infection to occur.
- Powdery mildew development cycle on peas
Primary infection occurs via spores formed on crop residue. Infected seeds are not believed to play a role in the initial infection. While the disease spreads during the season through conidial spores that are spread by the wind. This disease is suitable for warm weather (15 - 25 C), dry during the day, and cool at night, with dew during the morning period, while the disease is not suitable for rainfall, which washes away the spores and limits the spread of the disease.
- Photos of the disease at its beginning and after its spread, in high quality, at least 5 photos in high quality
- Losses of powdery mildew on peas
It is considered a disease Powdery mildew The most dangerous agricultural pest for plants, especially agricultural crops. It is a vital food fungus that infects approximately 10,000 species of angiosperms around the world. Powdery mildew takes its name from the form of its symptoms. If the affected crops and plants appear to have a pile of white flour on top of them, apple trees, oaks, roses, begonias, and strawberries are among the species most susceptible to powdery mildew.
- Control strategy
- Mechanical control
- Physical control (tillage, sanitation, pruning, solarization)
- Fungicides
- Preventive measures to prevent the occurrence of the disease
Plant resistant varieties, and spray plants when the initial symptoms of the disease appear with wettable sulfur, or with organic pesticides used to combat Powdery mildew On peas.
- Chemical control recommendations
Spraying with pesticides containing active substances such as (triazole group, azoxystrobin, trifluoxystrobin, chlorothalonil, tridimenol, myclobutanil, micronized sulfur, carbendazim)
- Anti-membership recommendations
Organic control methods For powdery mildew She also said that modern agricultural technology is one of the safest methods for treating plants. Because it is done using a dilute solution of hydrogen peroxide, which is the best solution compared to using chemical methods. It is used in certain ratios, let it be 1:9, and the largest number in this ratio is undoubtedly related to water. The farmer continues to spray this solution once every 7 days.
Severe infection can be prevented by spraying Leaves with sulfur-based solutions or oil Neem, kaolin or ascorbic acid.
All references and their links must be mentioned
https://plantix.net/ar/library/plant-diseases/100002/powdery-mildew/
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