Onion thrips

surface tissues and sucking out their contents, causing the surrounding tissue to die. The resulting silver-grey patches on leaves and the black dots of their [...] throughout the world. It is found outdoors on many plants and particularly damaging on onions, leek, and in greenhouses on cucurbits, tomato, sweet pepper, eggplant [...] eggplant, roses, chrysanthemum, gerbera, carnations, bulbs and many others. Life cycle and appearance of Onion thrips Onion thrips (Thrips tabaci) develops

Two-spotted spider mite

increased transpiration and reduced plant growth. As damage increases, whole leaves turn yellow, and as more cell sap is removed, the leaf, and eventually the whole [...] tomatoes and cucumbers, as little as 30% damage of the leaf surface can lead to loss of the crop. The nymphs and adults also produce webs, and plants can [...] stages: egg, larva, protonymph, deutonymph, and adult. In the larval and nymphal stages, an active period and a resting period of roughly equal duration

Powdery mildew

similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost on the upper side of the leaf. In severe epidemics [...] apple, pear, outdoor grown rose and other Rosaceae , the fungus causing powdery mildew is extremely sensitive to water and ‘hides’ on the underside of the [...] covered roses, the colonies appear first and foremost on the upper side of the leaves. In most crops, the white colonies later turn brown or grey. Severely

Citrus leaf miner

enter the leaf tissues of tender leaves and feeding on them produces snake-like mine. This causes the leaves to curl and twist. Severe infestation causes the [...] the leaves turn pale, curl badly, dry off and growth retardation of younger trees. Life cycle and appearance The moth lays the eggs singly up to 50 on lower [...] Pupation occurs inside the mines and tiny adult emerge after 5 to 7 days. The adults are around 2mm long, silvery white in colour with wings fringed with

Greenhouse whitefly

gerbera and poinsettia. Find solutions for whitefly in your crop Damage symptoms The larvae of whitefly need a lot of protein for growth, and thus consume [...] retarded. In full sunlight, leaves can wilt and fall. Such leaf damage can in turn influence the development of fruit and lead to a reduction in yield. The honeydew [...] the leaves, reducing photosynthesis and transpiration. Viruses can be transmitted. The consumption of plant sap and secreting of honeydew by whiteflies

Cauliflower

cauliflower head looks like broccoli and consists of white, flowering meristem. Only the cauliflower head is eaten, this white flowering part is at times referred [...] family of Brassicaceae . Broccoli, Brussels sprouts, cabbage, collard greens and kale (collectively called "cole" crops) belong to various cultivars, but are

Chili pepper

flowers are white and have a greenish white or greenish yellow corolla. The plant’s berries are very small (10–20 millimetres (0.39–0.79 inch) long and 3–7 m [...] millimetres (0.12–0.28 in) in diameter) and acrid, their shape is ellipsoid-conical to lanceolate. The fruit (the peppers) usually develop from a pale yellow

Soybean

long (1-3 inch) and contains two or four seeds that measure 5-11 mm in diameter. Soybean seeds vary greatly in size and the hull can be black or brown, but [...] Argentina, Brazil and the United States. Soybeans are now an important global crop can be used as food crop, but also provide oil and are a major source [...] soybean ( Glycine max ) (North America) or soya bean is a so-called legume and indigenous to East Asia. It is extensively cultivated for its edible beans

Flowering potted plants

well known and popular for its large red, white and green leaves, especially around Christmas. Begonia is a perennial flowering plants and belongs to the [...] These flowers have five or more petals and their colour varies from white to pink, red, orange, peach, yellow and purple. Phalaenopsis is also known as [...] grown indoors and are used as ornamental houseplants in countries with colder climates. Kalanchoe is a tropical, succulent flowering plant and a genus that

Downy mildew of Cucurbits

veins, which are first yellow and then turn brown. On the underside of the leave fluffy growth appears which is first white and later turns grey-brown. This [...] stomata. Life cycle and appearance of Downy mildew Pathogens causing downy mildew are not fungi but Oomycetes and related to Pythium and Phytophthora. They [...] during propagation and maintaining a warm and dry climate in greenhouses. Use hygiene measures. Start clean, remove crop residues and prevent splashing