Pepino mosaic virus

symptoms The impact of a PepMV infection for the tomato grower is variable. Several factors contribute to this variability. The genetic identity of the virus [...] pattern on the tomatoes Cracks and damage to the fruit (splitting open) Symptoms on fruits can appear with or without symptoms on the rest of the plant, depending [...] plant in the greenhouse has been infected by the virus, it is impossible to protect the other greenhouse plants from infection because of the rapid spread

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Shore fly

flies of the genus Scatella are a common greenhouse pest found throughout the United States, Canada and northern Mexico. In Europe and Asia, the species [...] direct damage to plant production. However, they are considered a nuisance pest because the flies : Leave their feces (as black flecks) on the foliage of [...] close to breeding sites. They breed in algae growing on soil, pots, benches, and other surfaces and the female disperses her tiny (0.1 mm) eggs on the surface

Early blight

occur at the side of the stem. Life cycle and appearance of Early blight From the primary infection of leaves, Alternaria solani can spread to the flowers [...] spores surviving in the soil are the main source of infection. Especially wheat and barley reduce the number of surviving conidia in the soil. Use resistant [...] General The only known stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause

Black rot of carrots

seed-transferred carrot disease. The seeds are the main source of primary infection and this may lead to death of seedlings. From the primary infection of leaves [...] this type of carrot disease can spread to the flowers (especially dangerous in crops for seed production) and to the crown. Lesions of black rot of carrots [...] spores surviving in the soil are the main source of infection. Especially wheat and barley reduce the number of surviving conidia in the soil. Use resistant

Black leg of seedlings

enable the spores to move through water. The zoospores are chemically drawn to the growing roots of young plants and move towards them through the soil water [...] later the plants wilt irreversibly. In potted plants the flower buds fall off. The side roots rot and very little of the root system survives. On the border [...] content of the substrate below 70% and ensure good drainage Disinfect recirculating nutrient solutions Increase the distance to the main substrate at the start

Bacterial wilt, brown rot

roots on the stem. The vascular stem tissue is coloured brown and when the stem is cut, bacterial slime oozes from the wound. This is the way to distinguish [...] common with bacterial slime oozing from the cut. When the bacteria transfers to young plants through infected tubers, the wilting and collapse of plants happens [...] signs of wilting during the day which may disappear in the early stages of infection. Under conditions favourable for the bacteria, the whole plant will wilt

Bacterial canker of tomato

efforts are used to prevent the bacterium from entering. When the occasional infection is found, strict measures are taken to eradicate the infection. In [...] brown centre. In potato, the disease usually only occurs in the second half of the season. The first symptoms are wilting of the lower leaves and subsequent [...] expansion of the wilt upwards. Cutting the stem at the foot shows whitish ooze with bacteria in the case of C lavibacter infection, but other than that the disease

Damping-off

enable the spores to move through water. The zoospores are chemically drawn to the growing roots of young plants and move towards them through the soil water [...] bulbs. At first, the plants recover during the night, but later the plants wilt irreversibly. In potted plants the flower buds fall off. The side roots rot [...] of the substrate below 70% and ensure good drainage Disinfect recirculating nutrient solutions. Increase the distance to the main substrate at the start

Crazy roots, hairy roots, crown gall

Adjust the work order in greenhouses to fit with the hygiene protocol Disinfect the nutrient solution in order to prevent biofilm growth inside the irrigation [...] crown gall The primary source of infection by Rhizobium rhizogenes has not yet been defined. The assumption is that the bacteria survive in the soil, but [...] from crazy roots. This disease seems to be caused by a change in the hormonal system of the plant resulting from the Rhizobium infection. Rhizobium rhizogenes