• Powdery mildew

  and makes it harder for the fungi to enter the leaves To reduce chances of powdery mildew in greenhouses, it is advised to first ventilate by only opening [...] noticeable. In case of a severe epidemic, the fluffy colonies also appear on the upper side of the leaves. Many sweet pepper cultivars react to powdery mildew [...] surface. On the mycelium on the plant surface, new conidiophores are formed, structures which contain new spores, the conidia. These conidiophores are the

• Bacterial canker of tomato

  greenhouse structures Use a crop rotation in field crops of at least two years and alternate with a non-host crop Apply deep-ploughing to stimulate the decay [...] the stem at the foot shows whitish ooze with bacteria in the case of C lavibacter infection, but other than that the disease is difficult to distinguish [...] General Clavibacter is a quarantine organism in Europe, which means that strong efforts are used to prevent the bacterium from entering. When the occasional

• Pierce's disease of grapevine

  younger vines than in older ones and faster in susceptible cultivars (within 2-3 years) than in more tolerant cultivars, which may survive more than five years [...] is compact and umbrella-like due to the shorter internodes. The foliage is denser and the leaves are a darker green than usual. Also, young infected trees [...] from early to midsummer. The necrotic area spreads over the leaf from the margin and is marked by a chlorotic band. In the beginning, only a few leaves

• Black root rot of cucurbits

  infection in this stage may kill the plants. In case of a less severe infection, the vines may wilt at a late stage of the crop, but when water supply is in [...] yellow-brown to black and ultimately die. Black lesions with fruiting bodies occur more commonly at temperatures of approximately 20 °C whereas at 10 °C the [...] stripes. The disease is usually restricted to a few of the roots but in severe cases all roots may be infected. At the final stage of the disease, only vascular

• Vici Routz SP

  the crop less susceptible to diseases Boosts the plant’s resistance to drought and other types of abiotic stress Acts as a bio-stimulant – a treated crop [...] When to use Vici Routz SP? Vici Routz SP is a natural product containing soil probiotics and prebiotics that stimulates the crop growth and root system [...] system, increases the tolerance to soil borne diseases which results in increased nutrient uptake and increased yield. How does Vici Routz SP work? Soil probiotics

• Orchid

  plant’s flower are usually colourful and fragrant. Nowadays there are no less than 28,000 known species, divided in about 763 genera. In addition, the flowers [...] orchids come in many different arrangements. Some only have a single flower, but most plants have a racemose inflorescence, which can consist of many flowers

• Angular leaf spot

  t. When conditions are humid, a viscous bacterial exudate forms on the underside of the leaf. This exudate changes to a white film when it dries. Lesions [...] types of vascular tissue of the crown can be infected, creating a look similar to that of a Phytophthora fragariae infection. Life cycle and appearance of [...] spring. The bacteria are also introduced in a crop in new transplants. This bacterium is very resistant to desiccation and can survive well in dry leaves

• Apple scab

  required, at lower temperatures this increases to 12-28 hours of leaf wetness for successful infection. Conidia also need water for germination. How to prevent [...] fall off prematurely. The plants’ defence mechanism is to produce corky rings around the lesions to prevent further invasion of tissue by the fungus. Late [...] released and repeat the cycle of infection of new plant parts and spore production. In autumn, the fungus produces new pseudothecia in leaves that have already

• Melon thrips

  preferably feed on leaves, less damage to buds and flowers. In addition to direct damage, it also transmits virus from infected to healthy plants. Life cycle [...] lays 1 to 8 eggs per day, with 3 to 164 eggs lays during their lifespan. Mated female lays 3 to 204 eggs. Eggs are deposited in leaf tissue in a slit cut [...] it drops to soil and pupate in soil. There are two pupal stages viz., prepupae and pupae. Adults are pale yellow or white in colour and 0.8 to 1mm in length

• Cottony soft rot

  cottony soft root, is a plant pathogenic fungus. It has a very wide range of host plants. Damage symptoms The first symptoms of a cottony soft root ( S [...] occurs with new dark sclerotia. The fungus also infects seeds and tubers, thereby creating a source of infection for the next crop. The dispersal to neighbouring [...] growth. How to prevent Cottony soft rot Practice dry cultivation/be careful with irrigation Use wide plant spacing Remove diseased plants in a closed plastic