How do apple maggot flies evolve?
Roughly 180 years ago, some hawthorn fruit flies in the Eastern coast of North America smelt the fruits on apple trees — a fairly recent import into that region from Europe — and found them attractive. Today, nearly 2 centuries later, the flies have evolved into two distinct ‘tribes’.
Where did the apple maggot originate?
The apple maggot, Rhagoletis pomonella (Walsh), also known as the apple maggot fly and railroad worm, is native to North America. Originally, it fed on the fruit of wild hawthorn (Crataegus spp.), but then became a primary pest of cultivated apples, especially in the northeastern United States and southeastern Canada.
Are there actually worms in apples?
Most likely the “worms” in your apples are actually codling moth larvae. The codling moth is a common insect pest and apples are its preferred food, although pears and English walnuts can also be targets. Burrowing codling moth larvae leave a brownish-red hole or “sting” at their point of entry.
What happens if you eat an apple with a worm?
They are neither harmful to humans (nor animals) nor do they carry any harmful parasites. Now, worms digging into the apple will cause some rot and that can produce an off flavor, but even the bacterial and fungal species that cause rot in apples are not a hazard for humans.
What do human worms look like in poop?
Pinworms are also called “threadworms.” They’re the most common type of intestinal worm infection in the U.S., and one of the most common in the world. They’re thin and white, and about one-quarter to one-half inch long — about as long as a staple. Tapeworms are flat worms that look a bit like ribbons.
Is it normal to have strings in poop?
Stringy stool may be caused by something simple, such as a low-fiber diet. In some cases, the cause is more serious. Stringy poop may also be referred to as stools that are pencil-thin, ribbon-like, thin, or narrow. Normal stool is about one to two inches in diameter.