• Powdery mildew

  react to powdery mildew infection by dropping leaves that are not infected yet. It depends on the cultivar how soon after infection this happens. In apple [...] the ears may also be infected. In pepper, the fluffy colonies occur mostly on the underside of the leaf, because the fungus infects the plant by entering [...] the fluffy fungal growth so typical of powdery mildew. Only in pepper, infection (by Leveillula taurica ) is through the stomata and the fungus grows inside

• Beneficial microorganisms

  microorganisms for pest control How it works Infection and colonization: Beneficial microorganisms start by infecting their insect hosts. The fungi produce spores [...] the fungal infection, the fungus continues to grow. Eventually, it produces more spores, which can be released into the environment to infect other pests [...] microorganisms play a crucial role in biological pest control by effectively infecting and controlling harmful pests. Beneficial microorganisms for pest control

• Charcoal rot

  and after plants begin bearing fruit or are subjected to stress. Severely infected plants collapse and die. When the crown is cut, internal symptoms can be [...] soil is directly related to disease incidence. Within 24 hours the fungus infects the roots of the host by direct penetration via germ tubes. During the next [...] roots and the fungus spreads into the cortex and vascular tissue. In the infected host tissues, new sclerotia are formed. Wilting, falling of leaves and

• Bacterial soft rot, bacterial stem rot

  carotovora or Pectobacterium carovora infects plants through fresh wounds, for example pruning wounds. It cannot infect healthy green leaves, but can grow [...] um carovora can also be found as secondary pathogen in plants that are infected by other pathogens. The bacteria that causes black leg in potato is a different

• Black leg of seedlings

  water. They infect the roots through small wounds, where the side roots are formed or through other similarly damaged spots. On the infected plant, new [...] Damage symptoms Pythium affects roots, in particular those of seedlings. Infected plants lag in growth. Seedlings fall over (‘ damping-off ’). In slightly [...] soil or substrate the plant turns brown. A typical symptom of a Pythium infection is the easy stripping of the skin from the root cortex with a finger nail

• Damping-off

  water. They infect the roots through small wounds, where the side roots are formed or through other similarly damaged spots. On the infected plant, new [...] Damage symptoms Pythium affects roots, in particular those of seedlings. Infected plants lag in growth. Seedlings start falling over, also called ‘damping-off’ [...] soil or substrate the plant turns brown. A typical symptom of a Pythium infection is the easy stripping of the skin from the root cortex with a finger nail

• Downy mildew of Cucurbits

  pumpkin, watermelon and squash. Damage symptoms Downy mildew pathogens infect mostly the leaves but occasionally also stems and fruits. They cause lesions [...] in downy mildews, sporangia often germinate directly and the germ tubes infect the plants either through the stomata or directly by penetrating the cuticula

• Grape mealy bug

  points. Honey dew secretion of mealy bugs support sooty mould growth on infected area. Young vines often die due to severe infestation of mealy bugs. Feeding [...] egg mass, honey dew, sooty mould and dead mealy bugs on grape berries. Infected bunches are not suitable for making raisins. Life cycle and appearance

• Brown root rot, corky root rot

  General Pyrenochaeta lycopersici is a fungal plant pathogen, infecting tomatoes and aubergine. It causes brown root rot and corky root rot. Damage symptoms [...] microsclerotia. The microsclerotia germinate and produce mycelium that in turn infect the roots of tomato and other hosts. Several alternate hosts in outdoor

• Pomegranate wilt complex

  stem and roots. Disease cycle The fungus survives for more than 7 years in infected plant debris and soil. The pathogen spreads through planting material,