Green peach aphid

peach aphids (Myzus persicae subsp. persicae ) may be green, white-green, light yellow-green, grey-green, pink or red in colour. They appear matt, never

Cottony cushion scale

and impeding gas exchange. Sooty moulds grow on the honeydew, blocking the light from the leaves and reducing photosynthesis. Also due to the honeydew, cottony

Root rot of carrot

y. The fungus sporulates on root, leaf, and petiole lesions. Continuous light is best for in vitro sporulation. Spore germination in vitro requires free

Grape downy mildew

before it can be visually detected in the field. Leaf symptoms Yellowish to light-green oil spots on the upper leaf surface, often angular and limited by leaf

Southern blight

Significant losses occur in soils infested by the pathogen, which have a light texture and humidity close to field capacity. In the southern USA, losses

Anagyrus vladimiri

a strong photokinetic response, i.e. the female is strongly attracted to light and is inactive in darkness.

Citrus mealybug

always shorter than 20% of body length. They produce little wax, so that the light yellow to pink body is visible through its waxy covering. There is often

Aphidius colemani

as long as the wings, is equipped with an ovipositor, and is black, with light brown legs.

Pierce's disease of grapevine

lesions occur on the underside of the leaves. These lesions start out in a light-brown colour, turning to dark-brown or necrosis. Fruits of infected trees

Neoseiulus californicus

supply has been absent for some time, they become thinner and a uniformly light transparent colour. Best conditions for use of Neoseiulus californicus Neoseiulus