Cactus mealybug

get their name from the fact that the body of the females from the third nymphal instar onwards are covered with a white waxy material in the form of powder [...] Damage symptoms The cactus mealybug usually infests stems but can occasionally be found on crowns, roots. and flowers. Depending on the host plant species [...] nymphs of the cactus mealybug are yellow-brown and not yet covered with wax. They are actively mobile and known as ‘crawlers’. From the second instar on, they

Horse-chestnut leaf miner

may cover the entire surface of the leaflets, especially from July on, when the second and third generations develop. Trees with a low number of attacked [...] depending on climatic conditions. After mating, each female may lay up to 180 eggs singly on the upper part of the leaflets. Females of the second and [...] between the upper and lower parenchyma. The mine starts to turn yellow and later brown. By this time, the damage is very visible. Eventually the mines may

Predatory insects

contributes to their effectiveness as biological control agents. Female gall midges lay their eggs on plant leaves, and when the larvae hatch, they feed on aphids [...] are known to be highly efficient predators, capable of consuming a significant number of aphids in a short period. Aphidalia , featuring the ladybird species [...] alternative to chemical pesticides. This reduces the environmental impact associated with the use of synthetic chemicals, safeguarding the overall ecosystem

Phytophthora blight

wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal in the soil happens via water, since the zoospores can readily [...] growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] enable them to move through water. Infection is usually from the root to the foot, but direct infection of the foot also occurs. Exudates leaking from growing

Natupol Booster

while at the same time collecting pollen to feed the brood. More workers emerge from the brood in the weeks after the introduction, increasing both colony [...] colonies, the ‘Beehome’ system should be closed. Remove the plastic liner and the sugar water tank from the hive, then place the liner back inside. Seal the [...] hives can be placed 4-7 days before the crop starts flowering Distribute the Natupol Boosters evenly throughout the plot. The best position is on a horizontal

Leaf miners

quantity of foliage can be lost before the harvest is affected. The size of a leaf tunnel depends on the stage of development of the leaf, the species of host [...] enemies, allowing the leaf miner population to erupt into serious numbers. In addition, the pesticides used to control leaf miners disrupt the biological control [...] according to the season, culture method and the susceptibility of the host plant. This susceptibility can also vary considerably from one cultivar to another

Hemp russet mite

Damage is caused by the mites sucking out the contents of plant cells. Hemp russet mite develops on the stems and petioles of the hemp plant and can cause [...] cause stunting. When populations are large, the mites can also be found on the underside of leaves. This results in smaller leaf size and suppressed bud [...] of the hemp russet mite are extremely small and difficult to observe. They are elongated (torpedo-shaped), soft and segmented. The body appears to be divided

Steinernema carpocapsae

ultimately killing the host within a few days. The nematodes then feed and reproduce within the cadaver of the dead host, resulting in the emergence of a new [...] 35°C/95°F can be lethal Nematodes are susceptible to ultraviolet light (UV): do not use them in direct sunlight The moisture content of the soil must be kept high [...] application. When possible, irrigate the crop before and right after application For foliar application, spray the nematodes when relative humidity will exceed

Macrocheles robustulus

should always be adjusted to the particular situation. Start introduction preventively or as soon as the first pests are detected in the crop. Introduction [...] before use Spread material evenly on soil or planting medium (not on the plastic) The dosage of Macro-Mite depends on climate, crop, planting medium and [...] robustulus is used for the control of the following pests: Sciarid flies (fungus gnats) Thrips Lyprauta larvae The predatory mites feed on larvae of sciarid

Lyprauta

mark on the apical wing parts as well as two smaller marks. Adults of L. chacoensis have only one small dark-coloured spot on their wings. The eggs of [...] start to rot internally. Just above the damaged area, the roots produce large numbers of new branches. This ultimately results in a reduced number of flower [...] are small earthworms of the family Enchytraeidae. Damage symptoms The symptoms are superficial damage on roots. Especially the root tips are affected.