Flowering potted plants

indoors and are used as ornamental houseplants in countries with colder climates. Kalanchoe is a tropical, succulent flowering plant and a genus that consists [...] leaves, especially around Christmas. Begonia is a perennial flowering plants and belongs to the family of Begoniaceae . The genus consists of 1,795 different [...] consists of about 125 species belonging to the family of Crassulaceae . Hibiscus is well known for its large, ornate flowers which are trumpet-shaped. These

Vidi Greenpath

Greenpath work? Vidi Greenpath contains alkaloids that work as an Insect Growth Regulator (IGR) and act as an antifeedant agent against nymphs and adults. Affected [...] When to use Vidi Greenpath? Use Vidi Greenpath for management of spider mites , thrips , plant hoppers in several crops and tea mosquito bug in tea Reasons [...] PHI issues Not sensitive to UV radiation Used in IPM programs which lead to a reduction in the use of chemical pesticides Environmental Aspect: Ecologically

Greenhouse whitefly

symptoms The larvae of whitefly need a lot of protein for growth, and thus consume a large quantity of plant sap. This contains a high proportion of sugar, and [...] probably Brazil or Mexico. Hundreds of plant species from different families serve as suitable hosts for this whitefly. It occurs on many crops, including [...] and the excess is excreted as honeydew, with larger larvae expelling large quantities. The damage that whiteflies cause to a crop is the result of sucking

Damping-off

substrate the plant turns brown. A typical symptom of a Pythium infection is the easy stripping of the skin from the root cortex with a finger nail. Life cycle [...] Pythium belongs to the Oomycetes, a separate group of microorganisms and is therefore not a real fungus. It survives as oospores, resting spores which are [...] General Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a sub-optimal condition or suffer from stress

Click beetles

Click beetles are elongate beetles with a hard exoskeleton, with the head deeply retracted into the thorax. When disturbed they lie on their back feigning [...] usually shiny yellowish brown or light brown with a darker head. Larval development takes 4 to 5 years. When fully grown the larvae pupate in the soil in summer [...] feigning death and then suddenly propel themselves into the air with a audible click. Hence their name. Their larvae are called wireworms and feed on the roots

Caterpillars

of all lepidopteran families. Most adults of this family are nocturnal. The caterpillars mostly pupate in the ground. Another family containing several [...] can rapidly decimate a plant. Very small caterpillars are not able to chew and therefore graze the underside of leaves. This causes a window effect where [...] caterpillars are often found in groups, spreading out over the plant as they grow larger. As their size increases, so too does the damage they inflict: leaves

Spinach

Amarantha family that originates in Asia. It is consumed as vegetable and is rich in iron. It is grown as a vegetable worldwide and growths to a height of [...] of about 30 cm. It is eaten fresh, steamed or boiled and has a high nutritional value.

Root rot of carrot

cause similar symptoms, which are collectively known as black spot diseases. When carrots are stored during winter, diseases on the carrot roots can continue [...] have been identified as the most prevalent black spot pathogens in Northwest Europe. Damage symptoms Rhexocercosporidium carotae is a slow-growing fungus [...] Cercospora and Alternaria dauci . Cercospora prefers younger leaves. A. dauci starts mainly along the leaf edges. Rhexocercosporidium infection can cause

Pierce's disease of grapevine

certain branches. When the leaves mature, slightly raised gummy lesions occur on the underside of the leaves. These lesions start out in a light-brown colour [...] discovered as hosts. Xylella fastidiosa is best known in grapevine, stone fruit (peach and plum) and citrus, where it causes diseases such as Pierce's disease [...] following seasons, these infected plants show a slower development and produce chlorotic shoots that are stunted. When the infection becomes chronic, the leaves

Mealybugs and scales

scales? Mealybugs (family Pseudococcidae), soft scales (family Coccidae) and armoured scales (family Diaspididae) form three important families within the s [...] Coccoidea are at first sight barely recognizable as insects. The females are wingless and immobile, and covered with a hard scale (armoured scales and soft scales) [...] ( Cladosporium spp.) are often found growing on this honeydew, which, as well as the white, waxy secretion of the mealybugs, reduces the ornamental value