General Mycosphaerella fijiensis also known as black sigatoka, is an ascomycete fungus that causes leaf-spot of banana. Damage symptoms Black sigatoka (Mycosphaerella fijiensis ) first causes small, l
What is apple scab? Apple scab is one of the most economically important fungal diseases of apple worldwide. Caused by the fungus Venturia inaequalis , the disease infects leaves, blossoms, young shoo
General Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a sub-optimal condition or suffer from stress, caused for example by too much water, too hig
General Thanatephorus cucumeris was long known as Rhizoctonia solani , the vegetative stage. It was long believed to be a sterile fungus, but recently it was discovered that the fungus produces basidi
General Ustilago nuda f.sp. tritici is a basidiomyceteous fungus that affects wheat. It is also known as loose wheat smut, or loose smut of wheat. Damage symptoms Infection by Ustilago nuda f.sp. trit
What is San José scale? San José scale (Comstockaspis perniciosa) is one of the most economically important scale insects affecting apple and pear orchards. Both nymphs and adult females feed by inser
What is apple sawfly? Apple sawfly (Hoplocampa testudinea) is an important early-season pest of apple orchards. Adult sawflies emerge during flowering and lay their eggs in apple blossoms. After hatch
What is pear rust mite? The pear rust mite (Epitrimerus pyri) is a microscopic, elongated, wedge-shaped eriophyid mite that feeds on leaves, shoots, and developing fruit in pear orchards. Unlike commo
What is pear blossom weevil? The pear blossom weevil (Anthonomus piri) is a destructive pest of pear orchards. Adult weevils emerge from summer dormancy in autumn to lay eggs inside developing flower
What is apple blossom weevil? The apple blossom weevil (Anthonomus pomorum) is an important early-season pest of apple orchards. Adult weevils emerge before flowering and feed on developing buds befor
