Bacterial canker of tomato

field and potatoes from other fields on the farm, are labelled as ‘suspect’ that year. On the infected field no potatoes or other Solaneceaous crops can [...] case of C lavibacter infection, but other than that the disease is difficult to distinguish from wilting caused by other pathogens. On potato tubers, first [...] can be planted for five years. On other fields on the same farm, no seed potatoes can be grown for one year after infection. Damage symptoms Clavibacter causes

Cut flowers

and North and South America. Some species have developed into large trees, others into small compact shrubs. In recent decades, the Hydrangea has been grown [...] as a cut flower in all sorts of colors and sizes. Hippeastrum is the Latin name for a bulbous plant that originates from Central and South America. It is

Wheat bunt

and release black, powdery spores, that smell like fish, hence the common name stinking bunt. Life cycle and appearance of Wheat bunt Tilletia tritici and [...] The filiform basidiospores fuse in the middle with a basidiospore of the other mating type so that H-shaped structures are formed. These can germinate directly

Dwarf bunt

and release black, powdery spores, that smell like fish, hence the common name stinking bunt. Additionally, plants only reach a fraction of their normal [...] The filiform basidiospores fuse in the middle with a basidiospore of the other mating type so that H-shaped structures are formed. These can germinate directly

Cutworms

thereby often cutting the stems of young plants. This is where their common name comes from. Cutworms are vey polyphagous and have a wide host range. Damage [...] of partial cutting. A larva often cuts one plant and quickly moves on to other plants and continues cutting. Therefore, relatively small populations of

Damping-off

growth. Seedlings start falling over, also called ‘damping-off’, hence the name damping-off disease. In slightly older plants, the leaves lose their turgor [...] the roots through small wounds, where the side roots are formed or through other similarly damaged spots. On the infected plant, new sporangia with zoospores

Caterpillars

group with more than 150,000 species, that are easily distinguishable from other insects. Many of the butterfly species that are active during the day can [...] that damage greenhouse crops is the leafroller family, the Tortricidae. The name ‘leafroller’ refers to the fact that the caterpillars often live in rolled-up

Diamond back moth

migratory and wind-borne adults can travel long distances to invade crops in other regions. Damage symptoms The caterpillar is a surface feeder. They feed from [...] constricted to form one or more light-coloured diamonds, thus the common name diamond back moth. The moths are weak fliers and can disperse, on average

Beneficial nematodes

nutrient recycling. Others are called parasitic nematodes, infecting plants, insects, animals, or humans. There are about 25.000 named species, but estimated [...] s (Lepidoptera), fly larvae ( Diptera ), Thrips (Thysanoptera) and many other soil-dwelling pests. Benefits of nematodes Using beneficial nematodes for [...] pests, including fungus gnats, vegetable root flies , root weevils , and other insect larvae. They are commonly used in greenhouse and nursery pest management

Amazone Plants continues the path of organic cultivation

A remarkable move ‘Well, we had ten good weeks, Fred and I said to each other when the coronavirus crisis erupted and exports came to a standstill,’ Lex [...] beneficials to keep these pests under control. Consultant Wim van der Meer names them for us. Amazone Plants uses Macro-Mite to combat the pupae of the Western