What are produced inside Chasmothecia?

Chasmothecia produce ascospores after a minimum of 2.5mm of rain and when temperatures are 10-30°C. This occurs mostly between budburst and flowering (late winter and early spring).

What kind of fungus is powdery mildew?

Powdery mildew is caused by many specialized races of fungal species in the genera Erysiphe, Microsphaera, Phyllactinia, Podosphaera, Sphaerotheca, and Uncinula. Hundreds of species of trees, shrubs, vines, flowers, vegetables, fruits, grasses, field crops, and weeds can be affected by powdery mildew.

What is the scientific name for powdery mildew?

Powdery mildew disease, caused by the fungus Blumeria graminis f. sp. hordei synonym Erysiphe graminis f. sp. hordei, appears as fluffy white growth on the surface of the leaf.

How do you identify powdery mildew?

The first sign of problems is usually white, powdery spots or patches on the top side of leaves or on plant stems. The powdery surface growth gradually spreads to cover the entire leaf, including the undersides, until the plant looks like it’s dusted with white powder. Infected leaves turn yellow and twisted.

What is Chasmothecia?

Chasmothecia are the sexual fruiting bodies produced by the powdery mildew organism. They only form on the surface of heavily diseased vine tissue and take about 90 days to fully mature. Immature chasmothecia are yellow, and gradually turn brown, then black.

What is endophytic mycelium?

Endophytic fungi are symbiotically associated biota of living plant tissues that induce a symptomless disease to their hosts21 and are not host-specific.

What is the main cause of powdery mildew?

Powdery mildew, mainly caused by the fungus Podosphaera xanthii, infects all cucurbits, including muskmelons, squash, cucumbers, gourds, watermelons and pumpkins. Powdery mildew infections favor humid conditions with temperatures around 68-81° F. In warm, dry conditions, new spores form and easily spread the disease.

What are the causes of powdery mildew?

Common Causes of Powdery Mildew

  • Poor Air Circulation. Overcrowded plant spaces are an excellent place for powdery mildew spores to develop.
  • Insufficient Light. Plants need plenty of light to grow and produce buds.
  • Over-Fertilization.
  • Compromised Air Quality.
  • High Humidity.

What are the effects of powdery mildew?

As the infection spreads, the plant weakens, and the leaves may turn yellow or brownish, dry out or even curl up, twist or distort. Flower and fruit production will also decline, and this disease can have a grave impact on harvests. In extreme cases, powdery mildew can kill a plant, but that is rare.

What plants does powdery mildew affect?

Plants affected by powdery mildew Many commonly grown annual and perennial flowering plants, as well as ornamental grasses, can be infected by powdery mildew. Zinnia, phlox, bee balm and peony are a few of the plants regularly infected by powdery mildew in the flower garden.

What is Ectophytic mycelium?

Inter cellular hyphae produce haustoria, which penetrate the host cell and absorb food. These are absent in intracellular hyphae. Endophytic intra cellular mycelium absorb food directly from protoplasm with out any specialized structures. In ectophytic mycelium, haustoria are produced in epidermal cells.