Trap Trees

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

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.
Miscellaneous forests are created and trap trees are used to control the spread of ALB.
Sirex noctilio in North America: the effect of stem-injection timing on the attractiveness and suitability of trap trees.
Results to date show the combination of insecticide injections, selective ash removal and trap trees is slowing the growth of the EAB population in the two areas.
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.
To date, of the 40 trap trees in Randolph County, larvae have been found in 10 trees.
Steuben County: Emerald ash borer was detected in a trap tree in Steuben County, near the southeast corner of Lake George in Steuben County, 0.
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.
Wood-borers were observed in trap trees starting with the first evaluation in August until the last in Dec 2008 and 2009.
2001), but recent studies by Dodds & Miller (2010) found it increased the attractiveness of trap trees to Xylosandrus germanus (Blandford).
Test of nonhost angiosperm volatiles and verbenone to protect trap trees for Sirex noctilio (Hymenoptera: Siricidae) from attacks by bark beetles (Coleoptera: Scolytidae) in the northeastern United States.
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.