Rice root aphid

without feeding on a host plant and they give birth to live offspring instead of laying eggs. Damage symptoms Because they suck the plant’s vital sap from [...] “Honeydew” deposited on the plant by aphids promotes the growth of mould and fungus. Transmission of viral disease between plants. Life cycle and appearance [...] olive-green, with a round body 1.4–2.4 mm long. It lives and feeds on the roots of the host plant. The winged form is about 1.8 mm long, darker than the wingless

Chafers

Damage symptoms Larval feeding on the roots can lead to yellowing and wilting of plants. Damage can be severe on young plants and especially in grassland [...] family. The larvae of both species live in the soil and feed on the roots of many plants. They are a serious pest that can cause substantial damage. The [...] The adult beetles fly in the evening, generally in June and July and land on trees to mate. During the night the females move to the ground to lay their

Mealybugs and scales

(mealybugs). They suck the sap of plants and are mostly host plant specific. Apart from the damage they cause by sucking plant sap, mealybugs and soft scales [...] Mealybug & scale damage Although most species of mealybugs feed on the aerial parts of the plant, some species extract their nourishment from roots, whilst [...] harmful viruses. Mealybugs inflict damage on the crop in various ways: nymphs and females extract the sap from the plant, stunting growth and causing deformation

May beetle

to crops, since they feed on plant roots, resulting in visible water stress and ultimately ending in the death of the plant. From the third stage onwards [...] symptoms Initial damage is not visible in the aerial parts of the plant, as the larvae only feed on root hairs and organic material during the first and second [...] instars. When they move to the next stage, the larvae start to feed on larger plant roots, which later leads to signs of wilting and stunted growth. Lifecycle

Trianum effectively controls Pythium in cucumber

roots. He puts two grams of Trianium-G on each mat before putting out the new plants in ‘duo’ pots (two plants in one rockwool cube). He decided to do [...] just ticking over. Those sorts of conditions have a bigger impact on the beneficials than on the thrips, which means I need to be alert. The same goes for [...] Thripex , in an overkill) keep thrips under control on the farm. Hendriks releases Montdorensis every week on half of his crop – the even rows one week, the

Beet armyworm

insecticides, and its ability to develop on wild vegetation during the summer. It is highly polyphagous, feeding on plants of more than 20 families. It is a serious [...] serious pest in greenhouses, where it feeds on ornamental plants such as chrysanthemum, gerbera, roses and potted plants. In both the greenhouse and the field [...] Damage symptoms Older caterpillars migrate to the top of the plant where they feed mainly on the growing tips. They produce large holes in the leaf, sometimes

European corn borer

are laid mainly on the underside of leaves. The larvae initially feed on the leaves and then bore into the upper part of the maize plants. Later, second [...] European corn borer attack. Later, frass and holes are easily visible on stems, or on the apical part of maize ears. Larval tunnelling weakens the stalks [...] has also been reported to attack apple, strawberries, peppers and other plants. It is present in Europe, North Africa and North America, where it was

Horiver Disc

cover paper from one side of the trap Place trap around the stem of the plant with the sticky side down, just above the substrate Remove the silicone cover [...] when largely covered by insects and/or debris Dosage One Horiver Disc per plant. Storage temperature 0-32°C/32-104°F. Storage time See Best before date.

Black rot of carrots

conducive to infection. In greenhouses: avoid high RH. Prevent plant diseases by optimizing plant potential and crop resilience. [...] species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary infection of the leaves. Survival can be several [...] radicina ) causes death of seedlings and dark brown lesions with a yellow halo on leaves, growing into crown rot. Infection of carrots during post-harvest storage

Cotton aphid

Aphis gossypii ) is an extremely polyphagous aphid found on more than 700 plant species. Crop plants attacked by this aphid include cotton, citrus, coffee [...] and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed [...] early enough in the season, the death of young plants. Retarded growth and defoliation reduce yield. Plant sap is rich in sugars, but has a low protein content