• Bacterial wilt, brown rot

  invades the plants through wounds or stomata and then spreads into the xylem vessels. In potato, it is tuber-borne. Spread from plant to plant results from [...] Ralstonia solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very wide [...] potential host plants. Damage symptoms In potato, field symptoms of Ralstonia solanacearum are wilting and yellowing of leaves and stunted plants. Inside, vascular

• Pea blight, leaf and pod spot

  they are more elongated. The lesions are light brown, sunken and surrounded by a dark brown to red-brown border. The first infection is often on the primary [...] years with non-host crops Bury or remove crop debris Prevent plant diseases by optimizing plant potential and crop resilience. [...] General Ascochyta pisi is a fungal plant pathogen that causes A scochyta blight on pea (leaf blight or pea blight) and lesions of stems, leaves, and pods

• Beet armyworm

  night. The forewings are grey-brown suffused with a dark brown or black. The head and thorax are brown and the abdomen grey-brown. The forewings have a yellowish [...] polyphagous, feeding on plants of more than 20 families. It is a serious pest in greenhouses, where it feeds on ornamental plants such as chrysanthemum, [...] yellow, green, brown or even black. The colour and pattern of the caterpillars is highly variable and depends partly on the host plant, the stage of d

• Broad mite

  pattern against the brown leaf tissue. Brown, corky patches can appear on the leaf stalks and main stems. The growing tips of affected plants acquire a misshapen [...] leaves and sporadic brown discolouration caused by cork formation. When plants are severely attacked, the growing tip can be killed, plant growth stops and [...] species that feed on fungi, algae, plants, as well as insect and mite predators and parasites. Those living on plants can cause considerable damage to their

• Early blight

  Alternaria solani causes small green to dark brown spots to occur on leaves. Those spots then turn into dark brown angular lesions with a yellow halo restricted [...] conducive to infection. In greenhouses: avoid high RH. Prevent plant diseases by optimizing plant potential and crop resilience. [...] leaves, petals and stems. These spots can be distinguished by the dark and brown concentric rings that are caused by sporulation. Species may differ in specific

• Tomato russet mite

  of the plant family Solanaceae may be affected to a lesser extent. Damage symptoms Damage is caused by the mites sucking out the contents of plant cells [...] they become brown and brittle. Badly affected tomato leaves and stems lose their trichomes (leaf hairs). Affected stems turn a rusty brown colour, and [...] Eriophyidae. It does not produce galls but lives freely (vagrant) on tomato plants. Aculops lycopersici was detected for the first time in Australia and is

• Stratiolaelaps scimitus (Hypoaspis miles)

  of up to 1 mm. The body is pale with a clearly visible brown dorsal shield, brown legs, and brown mouthparts. The females are larger than the males, and [...] material evenly on soil or planting medium (not on the plastic) The dosage of Entomite-M depends on climate, crop, planting medium and pest density and [...] soil-dwelling insects. The mites appear in and on the soil and at the base of plant stems and offer a sustainable and environmentally friendly alternative to

• Cyclamen mite

  species that feed on fungi, algae, plants, as well as insect and mite predators and parasites. Those living on plants can cause considerable damage to their [...] symptoms The cyclamen mite ( Phytonemus pallidus ) feeds on plant sap by penetrating the plant tissue with its piercing-sucking mouth parts. The mites are [...] Affected plants have an unnaturally dense appearance because the petioles remain short. Severely attacked leaves become brittle, turn brown or silvery

• Downy mildew of rose

  General Peronospora sparsa is a plant pathogen that causes plant diseases, such as downy mildew of rose and diseases on blackberries, raspberries and other [...] first yellow and then turn brown. On the underside of the leaf fluffy growth appears which is first white and later turns grey-brown. This is, in fact, the [...] germination. Inside the plant, the pathogens produce haustoria, small organs with which the pathogen can take up nutrients from the living plant cells. The pathogens

• Botrytis

  or may not grow into larger grey-brown lesions. The symptoms on fruits, flowers and on various parts of potted plants often only become visible during [...] of the plants. In cucumber and tomato the fungus causes lesions on pruning wounds. These lesions may encircle the stem, so the part of the plant above the [...] cinerea ) affects the fruit. In potted plants, the cuttings die due to carry-over infection from infected parent plants. Life cycle and appearance of Grey