Fusarium wilt

General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species [...] many different formae speciales which are each selectively pathogenic on a limited number of crops. Even within one crop, different formae speciales may [...] oxysporum life cycle, is similar to that of most Fusarium species. Fusarium overwinters for many years in the soil and on crop residues of infected plants

Downy mildew of rose

plants like blackberry. How to prevent Downy mildew Choose resistant cultivars Use a wide crop rotation with non-host crops Prevent a humid microclimate. Achieve [...] plant to fall over. In cabbage the stem is also infected in severe epidemics. In blackberry, red stripes may occur on the stems and petioles due to systemic [...] continue to grow inside the leaves and after a while new spore-bearing structures are protruding from the stomata. Because there are more stomata on the underside

Macrocheles robustulus

contents. Macrocheles robustulus is a generalist predator. In addition to soil-dwelling thrips stages, it also feeds on fly larvae, mites, springtails, nematodes [...] robustulus is 15°C (59°F). How to use Macrocheles robustulus The predatory mite Macrocheles robustulus is available in a cylinder ( Macro-Mite ). Turn [...] before use Spread material evenly on soil or planting medium (not on the plastic) The dosage of Macro-Mite depends on climate, crop, planting medium and

Phytophthora blight

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 [...] For germination on above-ground plant parts, leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from [...] Zoospores are spores with flagellae which enable them to move through water. Infection is usually from the root to the foot, but direct infection of the foot also

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Bacterial wilt, brown rot

can increase disease incidence with up to 250% Quarantine measures are in place, including a five-year ban on using a field for potato cropping after infection [...] solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very wide range [...] Ralstonia solanacearum is a quarantine organism in Europe and considered a bioterrorist organism in the United States. It is a commonly found soil-inhabitant

Black sigatoka disease

yellow spots or streaks on leaves of about one month old. The symptoms run parallel to the veins. Within a few days, the spots become a few centimetres in size [...] infection takes a minimum of two or three days under optimal conditions (humidity close to saturation and temperature above 20 °C). How to prevent Black [...] brown and ultimately dies. In cases of severe infection leaves may die within a few weeks. Because of the lack of leaf tissues, fruit maturity is hampered

Stratiolaelaps scimitus (Hypoaspis miles)

, and adult. Stratiolaelaps scimitus is a large mite with a body length of up to 1 mm. The body is pale with a clearly visible brown dorsal shield, brown [...] mites appear in and on the soil and at the base of plant stems and offer a sustainable and environmentally friendly alternative to chemical pesticides [...] contents. Stratiolaelaps scimitus is a generalist predator. In addition to soil-dwelling thrips stages, it also feeds on fly larvae, mites, springtails, nematodes

Damping-off

of the root system survives. On the border between air and soil or substrate the plant turns brown. A typical symptom of a Pythium infection is the easy [...] skin from the root cortex with a finger nail. Life cycle and appearance of Damping-off Pythium belongs to the Oomycetes, a separate group of microorganisms [...] similarly damaged spots. On the infected plant, new sporangia with zoospores are formed, that allow the disease to spread to neighbouring plants. The zoospores

Whitefly

tabaci are known to transmit viruses. Life cycle of whitefly Whitefly control videos Take a look at the video or go to our Youtube channel to see our whitefly [...] Whitefly damage The larvae need a lot of nutrients for growth, and thus consume a large quantity of plant sap. This contains a high proportion of sugar, and [...] field crops, feeding on plant sap and transmitting harmful viruses. Their feeding weakens plants, causes leaf yellowing and leads to honeydew deposits that