have a green colour and then change to a coffee brown colour when close to adult emergence. Finally, the adult has a mottled grayish-brown colour with…
from other aphids by the colour of the two cornicles (siphunculi). These cornicles are always black, whatever the body colour, which can vary widely,…
in size, shape and colour. The main colours are white, yellow, orange, red and pink, but one flower can have petals in varying colours. In addition,…
weeks, developing a greyish colour and a black cephalic capsule in the first stage, but later adopting a variety of colours such as green, brown,…
than 24 hours old, white in colour) are a much better prey than older whitefly eggs (more than 24 hours old, brown in colour). At 25°C under optimal…
in colour from green or brown to black. In younger instars, the relatively large head capsule is conspicuous. In older instars, the lighter colour of…
purposes. Traditionally, yellow is the main colour of this flowering plant. Nowadays, a wide range of other colours is available such as white, purple…
ics. Ripe apples usually have a red, yellow, green, pink, or russetted coloured skin. Additionally there exists also a wide range of bi- or…
stage) and nymph (2nd stage). The first nymphal stage is a transparent white colour and about 0.1 mm long. They usually develop to the 2nd stage…
mite has consumed several spider mites, the colour will gradually change to the characteristic red-orange colour. It all started with Spidex at…
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