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Pepino mosaic virus

e fruits. Moreover, some tomato varieties are more susceptible to quality losses due to PepMV than others and climate also has an impact. In general, when [...] plants are sure to follow. PepMV can survive in plant debris and on contaminated surfaces for several weeks, remaining infectious and ready to infect new plants [...] is impossible to protect the other greenhouse plants from infection because of the rapid spread of the virus. Strict hygiene protocols to prevent entry

Fusarium spp.

brown discolouration occurs. Infected glumes and kernels become white, due to dehydration, and later turn pinkish-red as spores are formed. Ear infection [...] of which DON (deoxynivalenol) is the best-known. The mycotoxins are toxic to mammals so maximum levels have been determined. Fusarium sambucinum (a.k.a [...] upwards. At the same time, the plant produces gum as a defence mechanism to stop the fungus from spreading. This gum blocks the xylem and causes the wilting

Rhizoctonia solani

fusion site die. To complicate matters further, subgroups can be distinguished within AG’s. The different AG’s are more or less specific to the pathogenicity [...] long known as Rhizoctonia solani , the vegetative stage. It was long believed to be a sterile fungus, but recently it was discovered that the fungus produces [...] general, the fungus causes symptoms on all plant parts that are in or close to the soil. Early infection of the growing tips of the roots shortly after

Black leg of seedlings

spores with flagellae, which enable the spores to move through water. The zoospores are chemically drawn to the growing roots of young plants and move towards [...] plant, new sporangia with zoospores are formed, that allow the disease to spread to neighbouring plants. The zoospores disperse via water. Therefore, this [...] nail. Life cycle and appearance of Black leg of seedlings Pythium belongs to the Oomycetes, a separate group of microorganisms and is therefore not a real

Bacterial canker of tomato

strong efforts are used to prevent the bacterium from entering. When the occasional infection is found, strict measures are taken to eradicate the infection [...] Replanting can only take place after thorough disinfection has been proven to the authorities. Potato growers lose their entire crop of the affected field [...] On stems and shoots light stripes form, which then tear, allowing cankers to form. On tomato leaves, water-soaked lesions occur, usually white with a brown

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 [...] Additionally, pathogenic Agrobacterium s pecies have recently been assigned to the genus Rhizobium . These pathogenic bacteria were formerly known as Ag [...] rhizogenes and Agrobacterium rubi, n ow the first part of the name is changed to Rhizobium. Rhizobium rhizogenes or Rhizobium radiobacter causes crazy roots

Gummy stem blight

How to prevent Gummy stem blight Before cropping: Remove all crop debris and disinfect the greenhouse Choose a cultivar that is less susceptible to internal [...] Calcium nutrition hardens the cell walls and makes it harder for the fungi to enter the leaves Pick flowers within two days after opening in areas suspected