Grape downy mildew

high-risk periods. Cultural and preventive measures Cultural practices play an important role in reducing disease pressure: Improving air circulation through [...] pressure. Biological control of Grape downy mildew Biological control plays an increasingly important role in the management of grape downy mildew (Plasmopara [...] grape downy mildew. Life cycle of Grape downy mildew Plasmopara viticola is an obligate biotrophic pathogen of grapevines, characterized by sexual overwintering

Vine mealybug

drop off. Plant sap is rich in sugars, but low in proteins. In order to gain an adequate intake of protein, mealybugs must therefore ingest large quantities [...] whole bunches of grapes can be colonized. The taste can also be affected. An infection by Planococcus ficus can make the plants more susceptible to injury [...] pupa and adult. The eggs are golden-yellow in color and are deposited in an cottony egg sac (ovisac) containing from 300-500 eggs. The nymphs are very

Citrus mealybug

drop off. Plant sap is rich in sugars, but low in proteins. In order to gain an adequate intake of protein, mealybugs must therefore ingest large quantities [...] citri are 2.5 - 4 mm long and 2 - 3 mm in breadth. Seen dorsally, they have an oval form; they are soft and covered with a fine waxy material. They move [...] in search of a female. A fertilized female lays several hundreds of eggs in an elongated cottony egg sac composed of white waxy threads. Once the eggs are

Aphidius colemani

cycle and appearance of Aphidius colemani Female Aphidius spp. deposit an egg in an aphid in which four larval instars subsequently develop. Once larval [...] her abdomen forward, she pierces the aphid with her ovipositor and deposits an egg. All this happens in less than half a second. Apart from the parasitization [...] 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

Asian citrus psyllid

General The Asian citrus psyllid, ( Diaphorina citri ), is an important pest of citrus in several countries as it is a vector of a serious citrus disease [...] readily fly short distances when disturbed. The psyllid’s life cycle includes an egg stage and five nymphal instars. The elongated-oval eggs are light yellow [...] two distinct red eye spots at maturity. Eggs are anchored to plant tissue in an upright position, and large numbers of eggs may be found on a single spot

Municipality Doetinchem: Entonem nematodes managing oak processionary caterpillar

caterpillar. As already stated, the use of nematodes is an important part of this. Entonem is without doubt an important link in ensuring manageability of the [...] within the built-up area. For the optimal effect, we did it twice.’ Entonem an important link Van Rijswijk is confident that the use of nematodes helps to [...] situation manageable for now. In the longer term, improving biodiversity will have an important role to play – breaching the monocultures of the oak and stimulating

Thrips

kidney-shaped and have a white or yellow shell. Before a female deposits an egg, she makes an opening in the plant tissue. The eggs are laid in leaves, flower [...] and hide deep within flowers and leaves, effective thrips control requires an integrated biological approach. Biological control of thrips combines several [...] support early detection and population reduction. Beneficial fungi can provide an additional line of defense. With Koppert’s biological solutions for thrips

Aphelinus abdominalis

plays an important role in reducing pest numbers, with the adult wasp piercing the aphid with her ovipositor, and sucking it empty without laying an egg [...] parasitic wasp Aphelinus abdominalis Once the female Aphelinus abdominalis detects an aphid, she will examine it briefly with the tips of the antennae. She turns [...] roughly equal measure. Life cycle and appearance of Aphelinus abdominalis An adult Aphelinus abdominalis is 2.5 to 3 mm in length, with short legs and

Two-spotted spider mite

small and have eight legs. Adult females are about 0.5 mm long. They have an oval body that is rounded at the rear end. Their colour can vary from orange [...] shape: Spider mites are tiny, adults are about 0.5 mm long in length. They have an oval-shaped body with eight legs, which distinguishes them from insects that [...] to monitor your crop regularly for signs of spider mites, so you can detect an infestation early and take action. This can be done by visually scouting the

Predatory mites

and thrips . Predatory mites are an essential component of integrated pest management (IPM) strategies as they offer an sustainable alternative to chemical [...] outbreaks by creating an environment where pests are less likely to thrive. Predatory mites for spider mite Predatory mites are an effective biological [...] environments, our Ulti-Mite sachets present an optimal choice. These sachets contain the same components but come in an industrially compostable plastic packaging