Podocarpus white insects are aphids? Introduction to Aphid Harm Symptoms

Are the white bugs of Luohansong aphids? Let's take a look at the introduction of the harmful symptoms of aphids.

Shape: nymph: the newly hatched nymph is flat, the wax powder on the body surface is relatively thin, it seems that the color is redder, and the wax powder of the old nymph is thicker, making the body color whiter. Most of the worms gather densely in the new leaves at the top of the branch buds, and the old leaves in the rear are left with pure white dry peeling left during the growth of nymphs.

Adult: the wingless viviparous adult is about 2 mm long, the body is round and fat, dark purple, because the surface secretes a layer of white wax powder, which makes the body gray-purple, and there is also white wax powder on the feet.

For harmful habits: adults give birth to nymphs directly. It is common for a group of adults and nymphs to gather in the tender leaves of Luohan pine, squeeze between the new leaves, and suck the leaf juice to make the new leaves yellowing and fine. The nymph has a lot of dry and peeling, adhering to the back of the leaves near the young leaves gathered by the nymphs, and floating in the air when the branches and leaves shake. When the new leaves of Luohansong encountered long-term drought, it was more serious. Aphids secreted a lot of honeydew and induced plant coal mildew, which covered the surface of middle-aged and old leaves with a layer of black powder. Host plants include Luohansong, bamboo and cypress, hundred days green.