Black leg of seedlings

flower buds fall off. The side roots rot and very little of the root system survives. On the border between air and soil or substrate the plant turns brown [...] finger 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 [...] immediately after planting. Avoid cold and excessive warm irrigation water. Keep the water content of the substrate below 70% and ensure good drainage Disinfect

Bacterial wilt, brown rot

well in water and in many different soil types and on alternative hosts like weeds. It invades the plants through wounds or stomata and then spreads into [...] may show signs of stunting and produce many adventitious roots on the stem. The vascular stem tissue is coloured brown and when the stem is cut, bacterial [...] pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very wide range of potential host plants

Powdery mildew

occur mostly on the underside of the leaf, because the fungus infects the plant by entering through the stomata and there are more stomata on the underside [...] mildew fungi and especially in greenhouse crops they don’t play a role in the epidemics. Fungal spores germinate on the leaf surface and the germ tubes [...] tubes grow and branch out on the leaf surface. Small structures are produced, the haustoria, from which the fungus penetrates the plant cell and takes up nutrients

Damping-off

flower buds fall off. The side roots rot and very little of the root system survives. On the border between air and soil or substrate the plant turns brown [...] finger nail. Life cycle and appearance of Damping-off Pythium belongs to the Oomycetes, a separate group of microorganisms and is therefore not a real [...] immediately after planting. Avoid cold and excessive warm irrigation water. Keep the water content of the substrate below 70% and ensure good drainage Disinfect

Black root rot of cucurbits

demarcation line on cucumber roots. The lesions are slightly sunken and are mostly formed around the point of attachment of lateral roots and root hairs. The [...] Disinfect nutrient solution and irrigation water Prevent plant diseases by optimizing plant potential and crop resilience. [...] The lesions may grow and encircle the root. The roots become yellow-brown to black and ultimately die. Black lesions with fruiting bodies occur more commonly

Newsletter

Knowing & recognizing

edition of Knowing and recognizing also includes new biopesticides and biostimulants that increase the plant’s resilience to stress and help the plant to [...] crop protection Knowing and recognizing does exactly what it implies. It empowers you with knowledge about the pest’s lifecycle and its many phases, as well [...] illustrations and close-up photographs. The knowledge gained will equip you to find the best sustainable solutions. First published 25 years ago and revised

Pierce's disease of grapevine

young infected trees show dwarfing. Leaves and flowers appear early and remain on the plant longer, but fewer and smaller fruits are produced. In plums, the [...] normal and look stunted. Twigs and branches die and the foliage becomes thinner, but the trees don’t die of the disease. Olives: Scorch symptoms and desiccation [...] desiccation of twigs and small branches occur on infected leaves. This usually starts in the upper part of the canopy on a few branches and then extends to

Parasitic wasps

their reliance on costly chemical pesticides. Consistency and long-term effectiveness : Parasitic wasps, once established, offer consistent and long-term pest [...] crop, which can enhance overall crop health and resilience. A diverse ecosystem often means fewer imbalances and outbreaks of specific pest species. How do [...] them valuable allies in horticulture and agriculture. Unlike chemical pesticides, parasitic wasps are natural and do not harm beneficial insects, animals

Plant Disease Management

caused by various pathogens such as fungi, bacteria, and viruses, can wreak havoc on agricultural crops and ornamental plants. For successful biological disease [...] is well-draining and nutrient-rich provides a solid foundation for plants to thrive. Healthy plants, in turn, are more resilient and better equipped to [...] disease management and improved crop health. They work by outcompeting pathogens for space and nutrients, parasitizing pathogens, and strengthening plant