Trap Trees

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Trap Trees

 

trees used as food decoys in the fight against harmful forest insects, such as long-horned beetles, flatheaded wood borers, and the Hylesininae, that feed on phloem and leave their offspring under bark. There are standing trap trees, which are dried out by a circular debarking of the trunk, and fallen ones, which have been felled and left in the woods. Weak trees and trees of little value, as well as windfall, windbreak, and felled timber, are used as trap trees.

The trap trees are set on backings 15–20 cm thick in habitats of particular insect pests. The insects populate the trap trees, make passages under the bark, and lay their eggs. Before the larvae pupate or eat into the sapwood the bark is removed from the trees (standing trap trees are felled first) and burned or buried underground at a depth of at least 0.5 m. Trap trees are also used to study the growth of destructive insect populations.

REFERENCE

Spravochnik lesnichego, 2nd ed. Moscow, 1965.

I. I. ZHURAVLEV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Plantation with different tree species, the cultivation of fast-growing timber forest, the plantation of trap trees, sanitation, removal of the damaged trees and exact placement of insecticide saturated sticks into larval sites can reduce the spread of ALB in the regions of China.
Sirex noctilio in North America: the effect of stem-injection timing on the attractiveness and suitability of trap trees. Agricultural Forestry and Entomology 12: 243-250.
Another management option involves using girdled trees as "trap trees." Once girdled trees have been debarked in fall or winter, the EAB larvae in the trees will be killed before they can complete development.
A few trap trees must be left unsprayed to give the weevils somewhere to go, otherwise they will wait until you stop spraying and come back.
The survey's information will help determine the response strategy, which could range from removing trees, to using pesticides selectively, to girdling ash to create "trap trees" that attract the beetles.
Emerald ash borer.--In 2005, trap trees were placed on a 3.25 km grid in 15 counties in northern Indiana to detect populations of emerald ash borer, Agrilus planipennis (Fairmaire).
In China, where the long-horned beetle is a major pest, American maples are often planted in sycamore plantations as "trap trees" to attract the voracious bugs.
In 2007 and 2008, we sampled five groups of trap trees one group per local; each group was comprised of five plants treated with herbicide (Dodds et al.
2001), but recent studies by Dodds & Miller (2010) found it increased the attractiveness of trap trees to Xylosandrus germanus (Blandford).
Phototactic response of Trioza erytreae (Del Guercio) (Hemiptera: Triozidae) to yellow-coloured surfaces, and an attempt at commercial suppression using yellow barriers and trap trees Bull.