Benefits of Using Our Service
- Service since 1947 – years of professional pest control experience
- Adopt Insecticide (Cypermethrin 24% EC) Which is Recommended in Handling Wood-Infesting Insects
- Insecticide-Direct-Injection to Infested Holes to Minimize The Use of Insecticide
- Satisfaction Guaranteed
Wood borers (Wood-boring beetles)
Depending on the species, wood-boring beetles can feed upon certain hardwoods or softwoods. Some hardwoods are naturally immune, if they have low starch content, or if the pore (vessel) diameters are too small for the female beetle’s ovipositor which prevents her from inserting eggs into the substrate.
Items that can be infested by wood-boring beetles include any wooden tools or tool handles, frames, furniture, gun stocks, books, toys, bamboo, flooring, and structural timbers.
Three families of beetles have species of wood borers that invade and damage structural and decorative wood and furniture. These families are the powderpost beetles, deathwatch beetles, and false powderpost beetles.
Common Types of Wood Boring Beetles
The term “powderpost” comes from the fact that the larvae of these beetles feed on wood and, given enough time, can reduce it to a mass of fine powder. They are therefore considered pests. The family Anobiidae is the only one capable of digesting cellulose, the primary ingredient of wood, and all other species excrete the wood without digesting it.
Powderpost beetles spend months or years inside the wood in the larval stage. Their presence is only apparent when they emerge from the wood as adults, leaving pin hole openings, often called “shot holes” behind and piles of powdery frass below. Shot holes normally range in diameter from 1/32 inch, (0.8 mm) to 1/8 inch (3 mm), depending on the species of beetle. If wood conditions are right, female beetles may lay their eggs and reinfest the wood, continuing the cycle for generations. Heavily-infested wood becomes riddled with holes and rooms or basements packed with a dusty frass wood that has passed through the digestive tract of the beetles. The larvae feed mainly upon starch in the wood.
Deathwatch beetles are closely related to the drugstore and cigarette beetles, which are stored-product pests. Adults communicate with each other and probably locate mates by tapping their heads against wood, usually at night. (Deathwatch beetles supposedly acquired their name during medieval European times from people who heard the tapping while sitting up with a sick or dying person during the night.) Adults are reddish to dark brown and lay eggs in crevices or small openings or pores in unfinished wood. Two years may be required to complete each generation.
Deathwatch beetles are found primarily in soft woods, including girders, beams, foundation timbers, and some types of furniture. Some species attack books. This beetle is typically found in old wood and may be associated with wood that is partially decayed. Deathwatch beetles prefer wood that is more moist (greater than 14% moisture) than what powderpost beetles prefer and may be less of a problem in houses with central heating and air conditioning. Larvae of deathwatch beetles fill their galleries with small pellets of frass (smaller than the pellets produced by drywood termites), which distinguish them from other wood borers. None of the other boring beetles produce pelletized frass.
False powderpost beetles
Adults are dark brown or black, sometimes with reddish mouthparts, legs, and antennae. Adults of most species are about 1/4 inch long, but in some species, adults reach 1-1/2 to 2 inches in length. Adult beetles have a humpback appearance, so their head is not visible when viewed from above. This characteristic is also seen in deathwatch beetles.
Females bore a tunnel, or egg gallery, into wood or other materials, then deposit their eggs in pores or cracks within the tunnel. Adults of some species bore through soft metal, such as lead and silver, as well as plaster and other nonwood materials, searching for sites to deposit eggs or for protection from weather extremes. This gives rise to the common name “leadcable borer” given to one species because of its habit of boring into the metal covering of suspended telephone wires. In buildings, false powderpost beetles infest floors, furniture, hardwood paneling, and other wood materials.
Oriental wood borer (Waterhouse)
The larva is white to yellowish, with a characteristic bostrichid shape, variable in size with most last instars averaging 10 mm. The mandibles are black, conical and the darkest area on the larva. All stages are found in dry lumber which is eaten by the adults and larvae. The eggs are deposited on rough surfaces of sawed lumber and logs, in holes, cracks or short tunnels made by the female. The larval borings may be 1/4 inch wide, winding for several inches. The tunnels are usually filled with tightly packed, fine, sawdust-like material which is characteristic of this genus. Tunnels of most pinhole and shothole borers contain very little such material. Pupation occurs in a cell at the end of the tunnel.
Oriental wood borer (Waterhouse)
Its habit of boring in packing cases, boxes, plywood, furniture and lumber make it a serious pest. In heavy infestations the wood is often reduced to powder to a depth of 2 to 3 inches. It is a threat to nearly all wood products, and has even been recorded as boring into the lead linings of boxes. In hardwoods, the damage is usually confined to the sapwood, but may extend deeper in soft woods.
Sanitation is the most important aspect of prevention. Remove and destroy dead tree limbs around buildings or near any area where wood products are stored. Destroy scrap lumber and other wood products before they become infested. Kiln drying of lumber destroys beetle infestations, although it does not prevent re-infestation.
Common DIY Control Measures
Protect wood from infestation by painting or varnishing to seal pores, cracks, and holes where eggs could be laid. Most beetle problems are introduced into homes in lumber or finished wood products (i.e., furniture, paneling, or flooring). Most serious infestations occur when infested wood is installed in the house. Inspect wood to insure that wood is not infested at the time of home construction.
Johnson Group Wood Borer (Wood-boring Beetle) Control Service
In keeping our words “Reducing any unnecessary use of toxic chemical to further reduce the impact to the rest of environment”. We adopt Insecticide-Direct-Injection by using a syringe and inject liquid insecticide into the holes one by one. The method can ensure the infested wood is thoroughly soaked and at the same time, avoid over use of insecticide.