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Damage to needles of Larix by Adelges geniculatus and other spruce gall aphids with host alteration | deutsch

Symptoms    Needles bent, on the yellow place of bending often a small, dark aphid with waxy wool; needles turn brown above the sucking place.
Impact    Intense attacks are common, but mostly only result in loss of increment; the danger of secondary agents (fungal diseases, frost) is markedly increased.
Control    Control normally not necessary; only in heavily infested cultures plants can be sprayed with an insecticide (see Official Register of Plant Protection). During the dormant season control with paraffin-oil compounds is possible
Hosts   Larch;
Affected plant parts    Needle;


Damage to short shoots at the stage of budburst
Larch needles: sucking aphids, waxy wool
Aphids underneath waxy wool, enlarged
Damage to larch needles



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