• Two-spotted spider mite

  mite damage Larvae, nymphs and adults cause damage to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce [...] reduced plant growth. As damage increases, whole leaves turn yellow, and as more cell sap is removed, the leaf, and eventually the whole plant, may die [...] dark yellow or brown.The colour of the adults often depends on the crop in which they occur (e.g. on cucumbers they are often yellow-brown, on tomatoes they

• Cutworms

  these moths usually feed on roots and plant parts close to the ground, thereby often cutting the stems of young plants. This is where their common name comes [...] observed because of partial cutting. A larva often cuts one plant and quickly moves on to other plants and continues cutting. Therefore, relatively small populations [...] cotton or maize. As plants become larger, older instars will occasionally tunnel into the growing stalk, disrupting the sap flow in the plant. Life cycle and

• Tomato moth

  forewings of adult tomato moths (Lacanobia oleracea) are a reddish-brown with a feint light brown, kidney-shaped marking, and a thin, toothed white line along [...] antennae are long and thin. Head and thorax are reddish-brown while the abdomen is a lighter grey-brown. The females of the tomato moth (Lacanobia oleracea) [...] later becoming white to grey-brown with mottled markings. The pattern of markings on the larvae varies according to the host plant and developmental stage.

• 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

• Chafers

  feeding on the roots can lead to yellowing and wilting of plants. Damage can be severe on young plants and especially in grassland and turf. There, secondary [...] 14-18 mm long and yellowish chestnut brown. Amphimallon majalis is somewhat smaller; about 13-15 mm long and reddish-brown in colour. The adult beetles fly [...] The larvae of both species live in the soil and feed on the roots of many plants. They are a serious pest that can cause substantial damage. The adults are

• Foot rot of cereals

  primarily affects the roots and lower stem of cereal plants, leading to rotting and ultimately compromising plant health and yield. Microdochium nivale thrives [...] onwards. It results in dark-brown staining of the lower nodes. Long dark streaks may also appear at the stem base. On older plants, infection can produce a [...] environmental conditions and host plant physiology. Typically, the lifecycle begins with the release of spores from infected plant debris or soil. These spores

• Black root rot of cucurbits

  wilting may occur sooner. In wilted plants, the crown first gets a water-soaked appearance, turning light-brown and sunken, later black with amber-coloured [...] annually Disinfect nutrient solution and irrigation water Prevent plant diseases by optimizing plant potential and crop resilience. [...] General Phomopsis sclerotioides is a plant pathogen infecting cucurbits, causing black root rot of cucurbits. Damage symptoms Phomopsis sclerotioides causes

• Pierce's disease of grapevine

  tyloses block the vessels, causing the plants to wilt. Transport to different plant parts depends on the plant species: in peach, bacteria are found in [...] show irregular maturation and patches of brown and green tissue. In the following seasons, these infected plants show a slower development and produce chlorotic [...] remain on the plant longer, but fewer and smaller fruits are produced. In plums, the first symptoms are irregular chlorosis or browning of leaves along

• Bacterial canker of tomato

  infect the new plants by entering through wounds and then growing into the vessels of the plant. Plant growth is inhibited and the plant wilts because the [...] occur, which later turn brown and may merge. The leaves wilt and curl upwards, often starting at one side of the plant. They turn brown but don’t fall off. [...] deep-ploughing to stimulate the decay of crop residues Prevent plant diseases by optimizing plant potential and crop resilience.

• Tomato looper

  Chrysodeixis chalcites ) can completely defoliate young plants. Infestations on ornamental plants reduce their marketability. Life cycle and appearance of [...] predominantly brown-gold with two conspicuous droplet-shaped white marks on the forewing that sometimes overlap each other. The hindwings are brown. The body [...] The pupa has a pale green body, with a dark brown ventral dorsal stripe, but the body can also be entirely brown.