• Leaf stripe

  barley until soil temperature is higher than 12-15 o C Prevent plant diseases by optimizing plant potential and crop resilience. [...] the base of the leaf and the leaf sheath. They gradually extend and become brown and chlorotic and may merge. Eventually this leads to the death of the leaf [...] which makes it look shredded. This is typical for this disease. Infected plants may be stunted and heads may be distorted and failing to emerge from the

• Apple collar rot

  n of the roots. On the foot, dark brown lesions with sharp borders occur. Above the graft and on leaves, dark brown, irregular lesions occur. In strawberry [...] above-ground plant parts, leaf wetness is required. Dispersal by wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal [...] circulation Disinfect recirculating nutrient solutions Prevent plant diseases by optimizing plant potential and crop resilience.

• Tea mosquito bug

  toxic saliva of the insect is injected to the plant tissues at the time of feeding causes reddish brown patches. As a result punctured snot to dry and [...] abdomen and greenish brown wings. Females is capable of laying about 500 eggs. The eggs are laid in all tender parts of the plant. The freshly hatched

• Black sigatoka disease

  puddles and ensuring optimal ventilation in the crop Prevent plant diseases by optimizing plant potential and crop resilience. [...] Within a few days, the spots become a few centimetres in size and turn brown with light grey centres. These spots enlarge further and the tissue around [...] the lesions turns yellow and dies. Lesions merge and the whole leaf turns brown and ultimately dies. In cases of severe infection leaves may die within a

• Pomegranate wilt complex

  fungus survives for more than 7 years in infected plant debris and soil. The pathogen spreads through planting material, root grafts, soil, irrigation, rain [...] Phytophthora are occasionally associated with fungi. Symptoms Affected plants show yellowing in some branches or twigs followed by drooping and drying [...] of leaves and branches. The entire tree dies in few months. Dark greyish brown to black colouration of wood below bark and vascular discoloured bands in

• Tobacco aphid

  chrysanthemum, and various pot plants and cut flower crops. Damage symptoms Nymphs and adults extract nutrients from the plant and disturb the balance of growth [...] the plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season, the death of young plants. Retarded [...] never glossy. Winged individuals have a brown-black head and thorax and a reddish abdomen. There is a dark brown spot on the abdomen and several transverse

• Phytophthora blight

  fungal growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] above-ground plant parts, leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal [...] circulation Disinfect recirculating nutrient solutions Prevent plant diseases by optimizing plant potential and crop resilience.

• Green peach aphid

  and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed [...] early enough in the season, the death of young plants. Retarded growth and defoliation reduce yield, Plant sap is rich in sugars, but has a low protein content [...] Winged individuals have a brown-black head and thorax and a yellow-green to green or even reddish abdomen. They have a dark brown spot on the abdomen and

• Black rot of carrots

  conducive to infection. In greenhouses: avoid high RH. Prevent plant diseases by optimizing plant potential and crop resilience. [...] rot of carrots ( Alternaria radicina ) causes death of seedlings and dark brown lesions with a yellow halo on leaves, growing into crown rot. Infection of [...] 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

• Glasshouse potato aphid

  substance, which leads to deformations in the growing tip of the plant. Precisely where the plant is pierced is unimportant. The piercing of the lower leaves [...] young aphids are born as developed nymphs. They immediately start to feed on plant sap and grow rapidly. When reproduction is sexual, the aphids lay eggs that [...] size (1.8 - 3.0 mm long) and oval in shape. It has a light yellow-green to brown-green colour, and has an overall shiny appearance. Antennae are marked by