On the roots off lettuce the nonsexual stages goes on. Late in the summer or beginning of autumn, winged male and females are born and they will return to poplar to mate and end the life cycle.
ses angreb på rødderne af salat som et hvidt uldent netværk.
However it has been shown that a part of the population is able to over winter in the soil and therefore able to directly attack young roots in the spring/summer. This goes on without any mating.
Damage
Attack on poplar has no important for the growth of the trees. Under certain conditions when the lettuce plant are weekend because of non favourable growing conditions, a heavy attack can inhibit the growth, but normally you will not see any serious damage of great important.
At the commercial growers, the lettuce often is treated with insecticides before planting and those insecticides have a side effect on lettuce root aphids:
Growing precautions. The plants should be kept in optimal growth without lack of water and fertilizer. Growing lettuce a distance from poplar should also influence in minor level of aphids attack
Control:
Attack from lettuce root aphids has no serious important, and should therefore not be treated neither on lettuce nor on poplar.
Precautions:
Growing precautions. The plants should be kept in optimal growth without lack of water and fertilizer. Growing lettuce a distance from poplar should also influence in minor level of aphids attack.
If You want to read more about aphids in general, please go to: bladluseng.htm
