• Damping-off

  root system survives. On the border between air and soil or substrate the plant turns brown. A typical symptom of a Pythium infection is the easy stripping [...] 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 [...] irrigation water. Pythium aphanidermatum mostly occurs in young plants and damage is more extensive in young crops. Damage symptoms Pythium affects roots, in

• Pepper weevil

  When they are already present on the crop, the best approach is to monitor them during the cooler parts of the day, as this is when they are most active. [...] measuring 2 to 3.5 mm in length, and over time they turn grey, reddish-brown, or nearly black. Their main distinguishing feature is a ‘snout’ which is longer than [...] to turn yellow before wilting and dropping off. When you see fruit on the ground, it is clear that the crop has been very severely damaged. Lifecycle and

• European red mite

  European red mites on leaves of trees causes initially brown spots on the leaves and when these coalesce the leaves loose colour; this is often referred to [...] Panonychus ulmi , is mainly a pest of fruit trees (apple, pear, plum and cherry). However, it can attack a large scale of other woody plants and is occasionally [...] bronzing. When infestation is heavy, leaves can drop. Life cycle and appearance of European red mite The European red mite feeds mainly on the undersides of leaves

• Black leg of seedlings

  root system survives. On the border between air and soil or substrate the plant turns brown. A typical symptom of a Pythium infection is the easy stripping [...] 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 [...] seedlings Pythium belongs to the Oomycetes, a separate group of microorganisms and is therefore not a real fungus. It survives as oospores, resting spores which

• Tomato russet mite

  are roughly 0.05 mm in diameter and are laid on the underside of leaves, on leaf petioles, and on stems on the lower portion of plants. When newly laid [...] galls but lives freely (vagrant) on tomato plants. Aculops lycopersici was detected for the first time in Australia and is a pest in tomatoes in all areas [...] symptoms Damage is caused by the mites sucking out the contents of plant cells. Affected leaves are slightly curled and acquire a silvery sheen on the underside

• Two-spotted spider mite

  colour of the adults often depends on the crop in which they occur (e.g. on cucumbers they are often yellow-brown, on tomatoes they are mainly red-brown) [...] large dark spots on their body. Movement: Spider mites are slow-moving and tend to cluster on the undersides of leaves, where they feed on plant sap. They [...] nymphs and adults cause damage to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce the cells and suck

• Onion thrips

  tabaci) is distributed throughout the world. It is found outdoors on many plants and particularly damaging on onions, leek, and in greenhouses on cucurbits [...] the adult depends on the food source. Onion thrips (Thrips tabaci) usually pupate in the ground, although pupae can also be found on leaves, in flowers [...] silver-grey patches on leaves and the black dots of their excreta indicate their presence in the crop. The vigour of the plant is reduced by loss of c

• Broad mite

  There are species that feed on fungi, algae, plants, as well as insect and mite predators and parasites. Those living on plants can cause considerable [...] cells, secrete substances that disturb local growth. Leaf feeding is mainly concentrated on the underside near the leaf stalk, which tends to cause the leaf [...] 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 visible

• Neoseiulus californicus

  present it will preferentially feed on them and the population development is much faster on a diet of spider mites than on other food sources. They can also [...] adult females feed on all stages of Two-spotted spider mite (Tetranychus urticae) whereas the larvae feed mainly on eggs, and the nymphs on eggs, larvae and [...] californicus) is commonly used for biological pest control of spider mites . Although Neoseiulus californicus prefers spider mites it can also feed on other food

• Aphidius matricariae

  matricariae is available in a bottle ( Aphipar-M ). Spread the material on rock wool slabs or in Diboxes Make sure the material remains dry and is not moved [...] wasp Aphidius matricariae Aphidius matricariae is a parasitic wasp belonging to the family Braconidae and is widely recognized for its role in biological [...] aphids . This small wasp is a valuable natural enemy in both agricultural and horticultural settings. Aphidius matricariae is used for the control of the