Spidex Vital lives up to its promises

lives up to its promises Sjaak van Dijk’s father was already using the predatory mite Phytoseiulus persimilis and Sjaak himself has always used it. However [...] what Sjaak van Dijk expected of it. A week after the first deliveries were released, he had a closer look at the crop. ‘It was clear that the predatory mites [...] somewhat less keen on it. Spidex Vital still has to prove itself in such dry conditions. I want to see what happens. However, it is a new product and Koppert

Beneficial microorganisms

bacterium Bacillus thuringiensis . Beneficial microorganisms for pest control How it works Infection and colonization: Beneficial microorganisms start by infecting [...] succumbs to the fungal infection, the fungus continues to grow. Eventually, it produces more spores, which can be released into the environment to infect

Root rot of carrot

black. The spots appear to be sharply defined, but under a magnifying glass it appears that the infected area radiates into the healthy tissue. The spots [...] carotae has delicate, simple morphological features hence is not easy to place it at the generic level. Årsvoll was the first to identify and describe the fungus

Black rot of carrots

Alternaria radicina Black rot of carrots 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 primary

Damping-off

Damping-off General Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a sub-optimal condition or suffer [...] Oomycetes, a separate group of microorganisms and is therefore not a real fungus. It survives as oospores, resting spores which are resistant to unfavourable

Early blight

Alternaria solani Early blight 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 primary infection

Southern blight

rolfsii . It is an important plant pathogen that inhabits the soil, and is responsible for root and stem rot, wilting and damping-off of seedlings. It has a [...] followed by periods of drought predominate. It was first observed in tomato crops in Florida in 1892, and it has been regularly reported as causing rotting [...] the production of vigorous mycelium. When the mycelium is young it is white; later it darkens. There are many sclerotia. They are round and their diameter

Bacterial wilt, brown rot

makes it more dangerous in temperate regions. It survives well in water and in many different soil types and on alternative hosts like weeds. It invades [...] brown rot General Ralstonia solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and [...] organism in Europe and considered a bioterrorist organism in the United States. It is a commonly found soil-inhabitant in tropical and subtropical regions and

Bacterial soft rot, bacterial stem rot

epidemic population densities. It can survive as epiphytic bacteria on various plants or in the soil in low densities. It has also been found in the gut [...] carotovora subsp. carotovora has recently been renamed Pectobacterium carotovora . It is one of the pectolytic bacteria causing extensive bacterial rots (bacterial [...] carovora infects plants through fresh wounds, for example pruning wounds. It cannot infect healthy green leaves, but can grow in senescent leaves and from

Crane flies

Tipula spp. Crane flies General The larvae of crane flies , called leatherjackets, live in the soil and feed on roots and shoots (which they pull into the ground of mainly grasses and cereal crops. Th