The biology of Anacampsis populella (Clerck) (Lepidoptera, Gelechiidae)
Urban, J.,Mendelova Univ., Brno (Czech Republic). Ustav Ochrany Lesu a Myslivosti
The paper deals with the occurrence, development and harmfulness of Anacampsis populella (Gelechiidae) on Populus tremula. The pest was monitored on 5 to 15-year old trees of the species at Forest District Bilovice nad Svitavou (near the city of Brno, Czech Republic) in 2008 and 2009. Caterpillars made leaf rolls of a mean length of 37.3 mm and width 5.5 mm there. In 80% leafrolls, one leaf was rolled up and in 20% two to five leaves. Towards the abaxial face of leaves, all leaves with caterpillars were rolled up but only part of peripheral leaves. Caterpillars occurred from 20 April to 25 June. They developed only through three instars and damaged leaves on an area of about 12.2 square cm. Grown up caterpillars pupated mostly in leaf-rolls. Pupae occurred from 10 May to 25 July and imagoes from 20 May to the beginning of August. Some 63 to 88% population of caterpillars and pupae were killed by natural enemies (particularly insect parasitoids, insect predators and birds). Eggs overwinter. The pest development is univoltine.
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