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VARROA MITES: A DANGER TO BEES - Untreated they can wipe out a bee colony within one to three years: Varroa mites are regarded as the greatest pest to the western honeybee. This animation explains how the tiny parasites threaten bees and explains what beekeepers can do about them.
Beekeeper Ernst Caspari has 20 colonies of…
THE BLACK WIDOW SPIDER is active when the temperature is 70 degrees or higher, but can survive lower temperatures with the right conditions. The black widow spider spins irregular webs, which is built at night near ground level. Once complete, these spiders hang upside-down in their webs.
Threats
Bites will only cause localized pain, however, if a…
Silverfish and firebrats are sometimes known as “bristletails.” The silverfish lives and develops in damp, cool places (prefer 75%–95% relative humidity), while firebrats prefer places above 90° F. Adult silverfish and firebrats are 1⁄2-inch in length. They are wingless insects with two long, slender antennae, and a flat carrot-shaped body, covered with scales, that tapers…
The clover mite tribe can become pests indoors after heavy rain, excessive heat or a change in the season, which stimulate massive numbers to enter buildings. The mites appear as tiny moving dark spots to the naked eye, crawling around walls, windows and doors. Crushing the mites to kill them leaves a reddish spot. Fortunately,…
Some cockroach species are known to transmit disease-causing organisms, and are most often implicated in the transmission of Salmonella, often the causal agent of food poisoning. German cockroaches also cause respiratory problems to individuals sensitive to the allergens they produce.
Most cockroaches are tropical or sub-tropical in origin and generally live outdoors. However, some species have…