The family Curculionidae includes weevils. These tiny insects have a length of between 0.125 to ¼ inch. Typically, a long, narrow snout sticks out from the body’s hard shell. Weevils are primarily pear-shaped insects with six legs and antennae. They feed on crops, garden plants, and food that has been kept, including grains and cereals. A staggering 97,000 different species of weevil exist. Most of them are classified as rice, granary, or root weevils, but let’s get started and learn about 11 other kinds of weevils.
1. Strawberry Root Weevil
The mature form of this common U.S. weevil appears between June and August. Every quarter of an inch long, each dark brown weevil has tiny pits all over its shell. Due of their inability to fly, strawberry root weevils are frequently mistaken for ticks.
As their name implies, these destructive weevils consume the roots of strawberries, but they also consume evergreens, raspberries, and brambles. These weevils are drawn to dampness, which is why they frequently appear in homes during the summer months as they search for water in sinks, bathtubs, and basins. While the larvae are more harmful because they consume plant roots, the adults consume foliage.
2. Boll Weevil
Although their first known location was in Texas in 1892, boll weevils are native to Central Mexico and entered cotton-producing regions of the United States in the 1920s, causing severe issues for the cotton industry. Production was somewhat restored by an eradication programme that began in 1978, but the pest persists.
A grey boll weevil’s ¼-inch length and even longer snout make it easy to identify. Adults of this variety of weevil drift on air currents and leaf litter in the atmosphere, but they are not very good flyers. The blooms and seed pods of cotton plants are where adult female boll weevils deposit their eggs. After a few days, the eggs hatch, and the larvae devour the plant, making it useless.
Although they have been exterminated in many southern states, boll weevils are still often found in Texas. In the song Little Sister, Elvis Presley immortalises only one weevil, saying, “She’s mean, and she’s evil like that old boll weevil.”
3. Large Pine Weevil
Young conifer and broadleaf trees like Douglas fir and Scots pine are home to pine weevils. In Europe, they pose a significant threat to commercial coniferous plantations.
These 1.4-inch dark brown weevils feature light brown hairs on their wing cases and dark red legs. The majority of nocturnal pine weevils favour young trees and feed on live tree bark. Entire unprotected plantations of recently planted young trees can be destroyed by an infection.
The larvae of the cream-colored pine weevil emerge from the stumps of fallen trees and fly to live trees to mate and feed. Their breeding seasons are typically in the spring and the autumn.
4. Nut Weevil
Hazelnut trees in Europe and Asia are infested by nut weevil larvae. This kind of weevil has a very long snout and is dark brown with specks of black or orange colour. This weevil, which is little than ¼ inch long, can completely destroy hazelnut crops.
When adult nut weevils emerge from their hibernation under leaf litter in the spring to feed on the leaves and blooms of nut trees, they are at their busiest. Inside a growing nut is one egg. The larva consumes the nut as it grows, burrows out, and lands in the leaf litter. The larvae of nut weevils hibernate in the soil and develop into mature adults by spring.
5. Rice Weevil
This kind of weevil has four orange-red spots crosswise on its wing case; it is either brown or black in colour. It can damage grain that has been stored more effectively because it can fly. It can also survive in wheat, corn, oats, pasta and birdseed.
In both residential and commercial settings, stored produce is attacked by rice weevils, also known as maize weevils in the United States. The female rice weevils, which are only a tenth of an inch long, eat a hole in a grain of rice and deposit an egg. After the larva consumes the kernel of the rice grain, an adult appears in just 28 days.
6. Wheat Weevil
In the US, the wheat weevil, commonly known as the granary weevil, is a prevalent pest. Cereal grains are attacked both in storage and in the field. Although a wheat weevil and a rice weevil look similar at first, wheat weevils are entirely brown, glossy, and primarily larger at 1/8th of an inch in length. They also lay their eggs inside grains.
A wheat weevil larva grows up with the cereal grain and only comes out when it is mature. When attacked or unsettled, this kind of weevil pretends to be dead! It does this by crossing its legs and remaining still.
7. Cabbage Stem Weevil
The size of a cabbage stem weevil is just under 1/8th of an inch. They have a body speckled with dark grey, yellow, and white, with large snouts typical of weevils and red-brown legs. One prominent white spot on the back. They look a lot like cabbage seed weevils, only the seed weevil has no white mark.
Brassicas like cabbages are infested by this species of weevil. In order to mate and deposit eggs beneath leaf surfaces, adults hibernate, overwinter in leaf litter, and then reappear in April or May. After hatching, a larva burrows into the stems of brassica plants, where it feeds until it falls to the ground to pupate.
A cabbage stem weevil infestation will cause numerous tiny stem holes and chewed leaf edges on the cabbages.
8. Lilac Root Weevil
What’s eating your lilac bushes? Is it possible that the leaves are turning yellow even with premium feed? It could be the nasty plant-eating lilac root weevils. In addition to decimating lilac, this kind of weevil also consumes euonymus and peonies.
The adult lilac root weevil is only 0.25 of an inch long, with a shiny brown body and a long, classic weevil snout. It leaves U-shaped edges after eating the foliage, but its larvae consume the root system. They may move into your house throughout the summer because they enjoy the wetness.
9. Vine Weevil
In the yard, vine weevil is a frequent appearance, especially on decorative plants like lilies. Although it is attracted to container plants, this kind of weevil can also infest plants with roots in the ground.
Adult, flightless vine weevils feed on leaves. They are at most ¼ of an inch long, dark brown, and have yellow wing case patterns. Damage to the margins of your leaves is more likely to be noticed before a vine weevil.Larvae inhabit soil-subsurface roots, where they feed and dwell. Grubs have creamy white bodies with brown heads.
Although common vine weevils pose no threat to humans, their larvae injure decorative plants. To eradicate an infestation, remove the soil from a container and add new soil. Using an open umbrella, shake the plant to remove mature weevils.
10. Sweet Potato Weevil
This kind of weevil is thought to be the world’s most destructive pest related to sweet potatoes. This weevil, albeit it has a terrible infestation, is quite attractive. Its legs are reddish brown, its belly is metallic blue, and it has an ant-like appearance. Its large weevil nose is characteristic, and halfway down, lengthy antennae protrude.
The maximum length of a sweet potato weevil is ¼ of an inch. Adults travel very little in flight in order to mate, lay eggs in sweet potato tubers, and feed on foliage. After a few days, an egg hatches, and the larva burrows out as an adult after eating sweet potato flesh. A network of microscopic tubes stuffed with excrement can be found inside a sweet potato infested by weevils.
Yellowing foliage is the first indication of sweet potato weevils, as they attack the plant from the roots up.
11. Giraffe Weevil
The giraffe weevil’s resemblance to a giraffe is not surprising. This species of weevil is native to Madagascar and gets its name from its exceptionally large snout, which is longer than its body.
This attractive weevil has a black body, a nose that is slightly shorter than an inch, and a deep red abdomen that covers its wings. At least two thirds of the span is made up of that enormous snout! The reason why men’s necks are two to three times longer than women’s is still a mystery to specialists.
Giraffe weevils inhabit the giraffe beetle tree (Dichaetanthera arborea) in tropical forests. After rolling a leaf and laying an egg inside, the female cuts the leaf so it falls to the ground. After emerging from their cocoon, larvae consume leaf litter and eventually burrow into the ground to become mature adults.