Cotton aphid

including the cucumber mosaic virus. Nymphs and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s [...] plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season, the death of young plants. Retarded growth [...] protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black fungal moulds ( Cladosporium spp.) grow on this

Potato aphid

from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation [...] protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black fungal moulds ( Cladosporium spp.) grow on this [...] asexual, the young aphids are born as developed nymphs. They immediately start to feed on plant sap and grow rapidly. When reproduction is sexual, the aphids

How to protect bumblebees in cold

climate on pollination and colony quality is also time-sensitive. The longer unfavorable conditions persist, the greater the impact on the bumblebees and [...] : Warmth is key Place the hives in the warmest part of the tunnel/greenhouse, ensuring they catch the morning sun. Make sure the hive is in a sheltered [...] inside or around the hive to incubate the brood. It's crucial to protect the brood during such conditions to avoid damage Keep in mind that the impact of climate

Western flower thrips

causing the surrounding tissue to die. The resulting silver-grey patches on leaves and the black dots of their excreta indicate their presence in the crop [...] and finally the adult insect. The eggs of the western flower thrips (Frankliniella occidentalis) are laid in leaves, flower petals and in the soft parts [...] buds. Compared to the prepupa, the pupa has longer, more developed wing buds and longer antennae that are curved back over the head. The prepupal and pupal

Green peach aphid

from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation [...] protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black fungal moulds ( Cladosporium spp.) grow on this [...] different families. Damage symptoms Of all the aphids , the peach potato aphid ( Myzus persicae subsp. persicae ) is the most important vector of viral diseases

Cyclamen main pest pressures

plant damage, by piercing cells on the leaf surface, and sucking out the contents. This causes silver-grey spots on the leaves, with dark green spots of [...] just visible to the naked eye, and is must commonly found in glasshouses. The mites may be concentrated around the buds, or infest the entire plant, resulting [...] robustulus , across the plants. This generalist predator will feed on thrips pupae in the growing medium, and any larvae that fall off the foliage. Thripex

Black vine weevil

It belongs to the family Curculionidae. Damage symptoms The major damage is caused by the feeding of the larvae on the roots. After the roots have been [...] Overwintering occurs in the larval stage, usually as medium sized instars. Once the temperature rises, the larvae become active again. The full-grown larvae [...] temperate climates, the small (0.7 mm diameter), spherical white eggs are laid from the beginning of July until around the end of October. The larvae that hatch

Dacnusa sibirica

hole in the pupal cuticle with their jaws. The orientation of the wasp within the host pupa is the same as that of the leaf miner itself, the head of the [...] jaws. The larvae of the parasitic wasp only reaches full development after pupation of the leaf miner larva. The adult parasitic wasps emerge from the leaf [...] sibirica The parasitic wasp Dacnusa sibirica is available in a bottle ( Minusa ). Release parasitic wasps between the leaves of the crop in the morning

About bumblebees

for the brood as well as perform maintenance jobs on the nest. As the nest continues to develop, the queen will not leave it. She will be inside the nest [...] throughout the winter season. Before hibernation, the new young queens will leave the old nest and mate with drones. As temperature rises and the spring season [...] active on cloudy, foggy, and rainy days. Honeybees are less active at low light levels Bumblebees work earlier in the morning and later into the evening

Two-spotted spider mite

to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce the cells and suck out the contents. The empty [...] yellow or brown.The 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 [...] become yellow, and in many plants the damage can also be seen on the upper surface of leaves as small yellow dots. The destruction of cells results in reduced