• Grey mould

  General Grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) is a commonly found fungus in many environments. It survives in plant parts like bulbs and crop residues or as sclerotia (drought- and cold-resistant structures) in the soil. Damage symptoms As the name suggests, grey mould’s ( Botryotinia fuckeliana / Botrytis cinerea ) most common symptoms are grey-brown lesions. The lesions occur on leaves, stems, fruits and flowers. On flowers, usually

• Downy mildew of Cucurbits

  General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops like cucumber, cantaloupe, pumpkin, watermelon and squash. Damage symptoms Downy mildew pathogens infect mostly the leaves but occasionally also stems and fruits. They cause lesions on the upper leaf surface, bordered by the veins, which are first yellow and then turn brown. On the underside of the leave fluffy growth appears which is first white and later

• Fusarium wilt

  General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species are considered weak pathogens and can only infect wounded or stressed host plants. Damage symptoms Fusarium fungi cause vascular wilt, root rot, foot and stem rot, leaf lesions, fruit rot, head blight in cereals and post-harvest decay. Fusarium oxysporum is the species causing vascular wilt. First

• Bacterial canker of tomato

  General Clavibacter is a quarantine organism in Europe, which means that strong efforts are used to prevent the bacterium from entering. When the occasional infection is found, strict measures are taken to eradicate the infection. In tomato, growers must either destroy the infected crop entirely or, if the crop is old, only the plants in the infected area, with a substantial buffer zone. Replanting can only take place after thorough disinfection

• Powdery mildew

  General Powdery mildew is a fungal disease that is caused by many different species of fungi such as Erysiphe, Podosphaera, Oïdium, Leveillula. Damage symptoms Powdery mildew symptoms are fairly similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost on the upper side of the leaf. In severe epidemics in cereals, the ears may also be infected. In pepper , the fluffy colonies occur mostly on the underside

• Thrips parvispinus

  About Tobacco thrips Thrips parvispinus , also known as tobacco thrips , is an insect native to tropical Asia and is widely distributed across East Asia, Northern Australia, and the Solomon Islands . In recent years, this thrips species has expanded its presence to northern China, India, other Asian countries, and several African nations . In Europe, Thrips parvispinus was first detected in Greece in 1998 as a pest of ornamental crops, later appearing

• Apple rust mite

  What is apple rust mite? Apple rust mite (Aculus schlechtendali) is a microscopic eriophyid mite that feeds on the leaves and developing fruit of apple trees. Because of its small size, the pest is difficult to detect without magnification, and infestations may only become noticeable after damage appears. High populations can cause leaf bronzing and fruit russeting, reducing fruit quality and marketability. Apple rust mite can multiply rapidly

• Apple sawfly

  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 hatching, the larvae feed inside developing fruitlets, causing characteristic feeding scars and premature fruit drop. Heavy infestations can significantly reduce fruit set, marketable yield, and fruit quality. Solutions Learn more Damage symptoms of apple

• San José scale

  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 inserting their mouthparts into twigs, branches, leaves, and fruit, removing plant sap and weakening the tree. Heavy infestations can reduce tree vigor, lower fruit quality, and significantly decrease marketable yield. The insect is protected beneath

• Apple blossom weevil

  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 before laying eggs inside unopened flower buds. The larvae develop within the buds, preventing blossoms from opening and reducing fruit set. Heavy infestations can significantly impact yield, particularly in orchards with high pest pressure. Learn more