• How to protect bumblebees from heat

  cool spot. There are various methods available for growers to do so: Right placement Placing the hive near the ground on the shade of the crop can keep [...] keep the temperatures inside the hive lower. Shading Providing effective shading to the top and the sides of the hive or providing an installation above the [...] temperature and sun radiation on the internal hive temperature can be great. We advise growers to protect the hive from direct sunlight and to place it in a cool

• Black leg of seedlings

  irreversibly. In potted plants the flower buds fall off. The side roots rot and very little of the root system survives. On the border between air and soil or [...] enable the spores to move through water. The zoospores are chemically drawn to the growing roots of young plants and move towards them through the soil water [...] lose their turgor or the leaf tips turn yellow, for example in flower bulbs. At first, the plants recover during the night, but later the plants wilt irreversibly

• Common cockchafer

  mandibles and long, hairy, well developed yellow legs. It takes three or four years for the larvae to fully develop. The grubs are 10 to 20 mm in the first [...] autumn, 30 to 35 mm by the following autumn, and 40 to 46 mm in the spring of their third year. The pupa is 25 to 35 mm long and whitish brown. [...] General The cockchafer ( Melolontha melolontha) , also known as the doodlebug or May bug is a European beetle of the genus Melolontha, in the family S

• Powdery mildew

  infects the plant by entering through the stomata and there are more stomata on the underside of the leaf. On the upper side, yellow spots are noticeable [...] In severe epidemics in cereals, the ears may also be infected. In pepper, the fluffy colonies occur mostly on the underside of the leaf, because the fungus [...] mostly occur in these crops. In covered roses, the colonies appear first and foremost on the upper side of the leaves. In most crops, the white colonies

• Cyclamen mite

  than the females and their hind legs are modified and used to transport pharate females. Eggs of the cyclamen mite are about half the size of the adult [...] mite. They are oval in form, smooth, transparent and twice as long as they are wide. Both ends are equally rounded. The larvae are opaque white and have only [...] mouth parts. The mites are mostly found within the flower buds, growing tips and young folded leaves, where the humidity is highest and they are protected

• Southern European marshland pyralid

  either within the crop or in another suitable spot in the vicinity. Pupation occurs in a cocoon made of webbing, frass and soil particles. The pupa itself [...] Damage symptoms The caterpillars often stay in the lower strata of the crop, sometimes attacking the stem of the plant as well as the leaves. Late instar [...] feature is the triangle formed by the head and forewings. Moths mainly fly at night, but can sometimes be seen in the daytime. Eggs are laid singly or in groups

• Black vine weevil

  spring in the soil. The depth where the pupae can be found varies between 2 and 20 cm. Pupae are white to cream coloured and 7 - 10 mm long. Outdoors there [...] caused by the feeding of the larvae on the roots. After the roots have been destroyed the larvae move into corms, rhizomes and stem bases of plants. Larvae [...] brownish black and have dull yellow spots on their back. The wing covers are grooved and fused with the body. Therefore, vine weevils cannot fly but can walk very

• FAQ Spidex Vital

  What is the difference in the product presentation? Spidex Vital consists of all mobile stages of Phytoseiulus persimilis. The carrier material is the same [...] is exactly the same Phytoseiulus species as in de former Spidex Vital: Phytoseiulus persimilis. When does it turn from white to red? Once the predatory [...] introduce Spidex Vital in the numbers you recommend your customers to obtain the best pest control. Does anything change to the mode of application? No

• Citrus mealybug

  problem in greenhouse horticulture, and in the tropics and sub-tropics on outdoor crops. The insect causes damage especially in fruit trees and ornamental [...] unfit for sale, and the reduced level of photosynthesis in the leaves also reduces flower and fruit production. In ornamental crops, the mere presence of [...] threads. Once the eggs are laid, the female shrivels up and dies. The first instar nymph develops from the egg. These first instar nymphs are known as ‘crawlers’

• Broad mite

  their eggs mainly on the underside of the leaf or on the fruit surface. The elongated, oval eggs are firmly attached to the surface and are rather large (about [...] General The broad mite (Polyphagotarsonemus latus) occurs in the tropics and in greenhouses in temperate regions. The broad mite (Polyphagotarsonemus latus) [...] to the damage caused by viruses. The typical pattern of damage consists of malformation and distortion of the above-ground growth of the plant. The mites