Search results
Results from the WOW.Com Content Network
Powdery mildew is a fungal disease that affects a wide range of plants. Powdery mildew diseases are caused by many different species of ascomycete fungi in the order Erysiphales . Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive.
Ampelomyces quisqualis is a mycoparasite of powdery mildews. It overwinters or survives in the absence of a suitable host as pycnidia. Raindrops cause conidia to be expelled from ripe pycnidia and these may splash onto nearby powdery mildew. Infection is favoured by humid conditions and temperatures in the range 20 to 30 °C (68 to 86 °F) and ...
Podosphaera fuliginea (also known as Podosphaera xanthii) is a plant pathogen that causes powdery mildew on cucurbits. Podosphaera fuliginea and Erysiphe cichoracearum are the two most commonly recorded fungi causing cucurbit powdery mildew. In the past, Erysiphe cichoracearum was considered to be the primary causal organism throughout most of ...
Powdery mildew usually appears in spring or early summer. Although it thrives in warm, humid conditions, it is also found in cooler climates. Easy, non-chemical practices can go a long way toward ...
M. diffusa infections on soybeans are referred to as powdery mildew. [1] Importance: Powdery mildew of soybeans is an important pathogen and tends to cause epidemics about every 10–15 years in Wisconsin. In 1975 the first epidemic there was observed and several have occurred since. [2] Powdery mildew affects the soybean plants.
In most powdery mildews only the epidermal cells are attacked. The external mycelium gives rise to short, erect conidiophores, each of which bears a single row of barrel-shaped spores, the youngest being at the base (the affected parts become thus covered with a forest of conidiophores assuming a white powdery appearance). The ripe spores ...
Powdery mildew, caused by the obligate biotrophic ascomycete Podosphaera leucotricha, is one of the major diseases of cultivated apple throughout the world. The primary host is apple, but other fruit like peaches and quince provide a host for Podosphaera leucotricha. [ 2 ]
Erysiphe betae is a fungal plant pathogen.It is a form of powdery mildew that can affect crops of sugar beet, that could cause up to a 30% yield loss.The fungus occurs worldwide in all regions where sugar beet is grown and it also infects other edible crops, e.g. beetroot.