• Black sigatoka disease

  the whole leaf turns brown and ultimately dies. In cases of severe infection leaves may die within a few weeks. Because of the lack of leaf tissues, fruit [...] Mycosphaerella fijiensis also known as black sigatoka, is an ascomycete fungus that causes leaf-spot of banana. Damage symptoms Black sigatoka (Mycosphaerella [...] one month old. The symptoms run parallel to the veins. Within a few days, the spots become a few centimetres in size and turn brown with light grey centres

• Two-spotted spider mite

  more cell sap is removed, the leaf, and eventually the whole plant, may die. In tomatoes and cucumbers, as little as 30% damage of the leaf surface can lead [...] General Two-spotted spider mite ( Tetranychus urticae ) is a pest of many crops throughout the world. Despite their small size, they are capable of very [...] are major crop pests. The two-spotted spider mite ( Tetranychus urticae ) is by far the most important species in greenhouses and many outdoor crops. Damage

• Mirical

  of tomato leaf miner moth ( Tuta absoluta ) and other moths. Also feeds on two spotted spider mites ( Tetranychus urticae ), aphids and leaf miner larvae [...] wool slabs, in Diboxes or on leaves. Make sure the material is not disturbed for at least a few hours Introduce in clusters of at least 50 predatory bugs [...] m 2 /release. Releases should be repeated after 2 weeks. Consult a Koppert advisor or a recognized distributor of Koppert products for advice on the best

• Downy mildew of rose

  upper leaf surface, bordered by the veins, which are first yellow and then turn brown. On the underside of the leaf fluffy growth appears which is first [...] germination free water is required. For most downy mildews, the optimum temperature is around 15 °C. The closer the temperature is to these 15 °C , the shorter [...] after a while new spore-bearing structures are protruding from the stomata. Because there are more stomata on the underside of the leaf, this is where

• Persea mite

  overall tree vigour. In severe cases, extensive damage leads to leaf yellowing, premature leaf drop, and canopy thinning, which can expose fruit and branches [...] General Persea mite ( Oligonychus perseae ) a key pest in avocado production worldwide. It lives and feeds on the undersides of avocado leaves, where it [...] it forms small webbed feeding colonies that cause significant leaf damage and can reduce photosynthesis, fruit yield, and tree health when left unmanaged

• Impatiens thrips

  deposited in the leaf tissue, while subsequent stages are found on the upper- and undersides of the leaf. Pupation occurs on the leaf rather than on the [...] mostly been able to spread as a consequence of the trade in foliage plants. Impatiens thrips (Echinothrips americanus) has a wide range of hosts. In addition [...] pupae remain immobile on the leaf tissue. Adults are found on both upper- and undersides of the leaves. This species of thrips is relatively large. Both males

• Spider mites and other mites

  of the plant. The number of eggs laid by a single female can vary, and they can hatch within a few days to a couple of weeks, again depending on environmental [...] about What are mites? Plant mites are a diverse group of small arthropods that feed on plant sap. They are found in a wide variety of habitats, from forests [...] seen with the naked eye but have eight legs. For these plant mites a magnifying glass is needed to detect them. Plant mites are often found in colonies on

• Consumers

  sufficient quantities to feed a rapidly growing population. Producing our natural enemies and microbiological solutions is a knowledge-intensive process [...] Biological crop protection What is biological crop protection ? The idea behind biological crop protection is very simple: natural enemies such as predatory [...] to combat pests and diseases in a natural and sustainable way. In this way, we hope to make an active contribution to a sustainable society, with safe food

• Broad mite

  local growth. Leaf feeding is mainly concentrated on the underside near the leaf stalk, which tends to cause the leaf to turn brown and curl up. A typical [...] brown stripes forming a fine network on the leaves. In case of a more serious infestation, this network becomes so dense that there is no more green tissue [...] causing them to stand out as a green pattern against the brown leaf tissue. Brown, corky patches can appear on the leaf stalks and main stems. The growing

• Tobacco whitefly

  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 the excess is excreted [...] pupa via a T-shaped fissure. The adult whiteflies are often scattered over the entire plant where they deposit their eggs. This is why on one leaf all different [...] es: If the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight