population. Large individuals (up to 1.8 mm long) are usually dark green to black, while aphids produced in overcrowded colonies at a high temperature…
Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The…
development. After the second instar, a male nymph forms a dark brown ‘prepupa’ from which a pupa rapidly develops, inside a white cottony cocoon.…
embryo is visible as a red ring. The larvae are up to 20 mm long, initially whitish and later pale pinkish white, with a brown head and a pale anal…
ground surface close to plant roots. The larvae can grow to 5 to 12 mm in length and 0.5 to 1.5 mm in diameter. They are legless and have a…
aphid, Neomyzus circumflexus , has a cosmopolitan distribution and a wide host range. In temperate climates it is primarily a pest in greenhouses…
glossy. Winged individuals have a brown-black head and thorax and a yellow-green to green or even reddish abdomen. They have a dark brown spot on the…
Larvae hatch four to seven days after the eggs are laid and complete their development over six to eleven larval instars in 40 to 100 days, depending…
1860, the cannabis aphid ( Phorodon cannabis ; a.k.a. bhang aphid or hemp aphid) is a very new pest to North America. It was first seen on cuttings…
tunnel just prior to pupating, is known as a prepupa. This stage lasts only a few hours. Damage symptoms Leaf miners cause damage to plants both…
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