Additives

Onion thrips

black dots of their excreta indicate their presence in the crop. The vigour of the plant is reduced by loss of chlorophyll. When infestations become serious [...] eggs of the onion thrips (Thrips tabaci) are laid in leaves, flower petals and in the soft parts of stalks. They are inserted into the plant tissue with a [...] head and bright red eyes. The colour of the adult depends on the food source. Onion thrips (Thrips tabaci) usually pupate in the ground, although pupae can

Grape downy mildew

flowering and early berry development pose the greatest risk to crop performance. Early symptom detection, a clear understanding of the disease cycle, and vigilant [...] suited for the preventive management of grape downy mildew. Life cycle of Grape downy mildew Plasmopara viticola is an obligate biotrophic pathogen of grapevines [...] is triggered when temperatures reach 10°C in the presence of soil moisture, leading to the formation of macrosporangia that release motile zoospores within

Grapevine powdery mildew

symptoms of Grapevine powdery mildew Symptoms of grapevine powdery mildew vary according to the phenological growth stage and the severity of the infection [...] yellowish spots on the upper leaf surface Development of white to grey, powdery fungal growth Powdery coating may also appear on the underside of leaves Leaf [...] and early berry development. As the season concludes, the fungus forms chasmothecia to ensure its survival through the winter. Given the polycyclic nature

Western flower thrips

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 chlorophyll. When [...] finally the adult insect. The eggs of the western flower thrips (Frankliniella occidentalis) are laid in leaves, flower petals and in the soft parts of stalks [...] their developing wing buds. Compared to the prepupa, the pupa has longer, more developed wing buds and longer antennae that are curved back over the head

Spidex Vital lives up to its promises

they lay their eggs earlier, the population develops more rapidly.’ A sense of calm on the farm The increased effectiveness of Spidex Vital is a major advantage [...] potential to develop into a game changer in spider mite control. It changes the rules of the game and is even more in control of spider mites . And the grower [...] cucumbers. The ability of Spidex Vital to tackle spider mites and hot-spots effectively brings a sense of calm to the farm.’ He states that the weather

Aphidius ervi

to parasitize. Because of this, the disturbance of aphid colonies can have a serious impact. The aphids can be spread through the crop, and it has been [...] is used for the control of the following pests: Potato aphid ( Macrosiphum euphorbiae ) Glasshouse potato aphid ( Aulacorthum solani ) The parasitic wasp [...] recognized distributor of Koppert products for advice on the best strategy for your situation. Best conditions for use of Aphidius ervi The parasitic wasp Aphidius

Aphidius colemani

Aphidiidae. First the host is examined by drumming with the antennae. This gives the wasp the information about whether the aphid is the right species, and [...] disturbance of the aphid population by the presence of the parasitic wasp also has an effect: the alarmed aphids secrete a warning substance, which affects the [...] Aphidius colemani is widely used in the biological control of aphids . Aphidius colemani is used for the control of the following pests: Cotton aphid ( Aphis

Asian citrus psyllid

southern states and Mexico however the state of Florida is the most affected area by the vectored disease. Damage symptoms The psyllid is a sucking insect that [...] and the disease is responsible for the destruction of several citrus industries in Asia and Africa. In North America, it has spread through most of the [...] mature. Worst damage is done when the insect is vector of the bacterium Candidatus Liberibacter asiaticus that cause the fatal citrus disease called citrus

Cutworms

occasionally tunnel into the growing stalk, disrupting the sap flow in the plant. Life cycle and appearance of Cutworms The adults of Agrotis spp. have pale [...] Important species are for instance the black cutworm Agrotis ipsilon and the turnip moth Agrotis segetum . The larvae of these moths usually feed on roots [...] usually observed as a cutting of young seedlings, often causing death of the cut seedlings. Sometimes wilting is observed because of partial cutting. A larva