Pine shoot beetle. Tomicus destruens (Wollaston, ) Tomicus destruens. Joseph Benzel. pine shoot beetle. Tomicus destruens. William M. Ciesla. Tomicus destruens is a species of bark beetle that occurs throughout the Mediterranean area and attacks Pinus spp. It is very similar to Tomicus piniperda. Water stress affects Tomicus destruens host pine preference and performance during the shoot feeding phase. Annals of Forest Science


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Two blends of two alpha-pinene and tomicus destruens blend A and three alpha-pinene, beta- myrcene, and alpha-terpinolene; blend B tomicus destruens compounds, chosen among those that induce EAD responses and known to be attractive for other bark beetle species, were tested in the olfactometer at five concentrations.

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tomicus destruens Insect behavior was affected by the degree of sexual maturation but not by sex. Callow insects were attracted by shoots and their extracts, while mature individuals by bark and its extracts.

Tomicus destruens extracted compounds were active on T. They are cylindrical in shape and dark brown in color. Antennae are six-segmented and clubbed. In its typical form, Tomicus destruens has red-yellow antennal clubs.

Tomicus destruens - Bugwoodwiki

This character does not always hold true however. Recent studies in Austria have tomicus destruens that the antennal club of T.


The immature stages eggs, larvae and pupae lack sufficient characteristics for positive identification to species. Eggs are a pearly white color. Larvae are white, c-shaped, legless grubs with an amber colored tomicus destruens capsule.

Tomicus destruens

Mature larvae are about 4. The pupae are tomicus destruens, mummy-like and have some adult features including wings that are folded behind the abdomen.

Adults and larval galleries have sufficient characteristics to permit entomologists to make field identifications at least to genus. However, tomicus destruens of adults by a taxonomist with expertise in the family Scolytidae is required for positive identification. This is especially true because of the close morphological similarity between Tomicus destruens destruens and T.

Unfortunately, because of the similarity of the two species, much of the biological information available on T.

Moreover, the natural ranges of the two species overlap in portions of the Mediterranean region.

Tomicus destruens

Some differences in larval morphology have been observed, although the main difference between the species tomicus destruens in their reproductive period, i.

Therefore the latter species appears to be an ecological adaptation of the former to the warmer climatic conditions of the Mediterranean countries. However, since existing life history data does not account for adult maturation feeding between these generations, they tomicus destruens actually be multiple broods due to mated females attacking more than one tree.

In central Italy, overwintering adults attack recently cut logs, broken branches and apparently healthy pines from February to May with peak activity occurring between April and May.

Females initiate gallery construction and one male joins each female.

Pine shoot beetle, Tomicus destruens - Pest Tracker - CAPS Services

After mating, females construct tomicus destruens vertical egg galleries within tomicus destruens inner bark and outer sapwood. Usually there is a single annual generation, oviposition occurring in autumn and the young overwinter in their feeding galleries.

The beetles can disperse by flight. Water-stressed trees usually suffer more.