Controlling the Apple Blossom Beetle: Effective Methods for Getting Rid of Apple Blossom Pests

Orchard pest infestations are one of the main problems gardeners face annually. They damage not only the trees themselves but also the harvest. The apple blossom beetle is considered a prime example of this type of insect. To effectively combat it without harming your crops, you need to know its distinctive characteristics.

General characteristics

The apple blossom weevil (Anthonomus pomorum) belongs to the weevil family, a suborder of beetles. Because the insect feeds on newly formed buds of pear and apple trees, it can cause significant damage to the crop.

Appearance

Adults are typically small in size, ranging from 0.3 to 0.5 cm. The legs, abdomen, and back of the beetle are dark brown, while the elytra (elytra) are light brown with dark stripes. The oval body is covered with fine, light-gray hairs, virtually invisible at first glance. The insect's elongated head is triangular in shape. Its anterior portion consists of a thin, elongated proboscis, short in males and long in females. The mouth is located at the end of the proboscis. The apple blossom beetle has three pairs of teeth.

Life cycle

In three phases of development the beetle looks like this:

1. The egg is oval and white, almost transparent. Its size ranges from 0.5 to 0.9 mm. Each clutch contains 50 to 100 eggs.
2. The larva is distinguished by its curved shape, with a thicker anterior portion. Its body is light yellow, while the head is dark brown. The larva lacks legs.
3. The pupa is the same size and shape as the adult. On the yellow body, signs of the formation of wings, a proboscis, and legs can be seen. Two spines are located on the abdomen.

Area of ​​distribution

Anthonomus pomorum is a fairly common insect, found almost everywhere where domestic apple trees are grown. This pest's range in Eurasia is as follows:

• in the east – China, Korea, Japan; Primorye, Manchuria, the Japanese Islands, the Far East;
• in the West – all of Europe;
• in the south – the Caucasus;
• in the north – the 59th parallel (including St. Petersburg).

Lifestyle

The apple blossom beetle is a complete metamorphosis insect with a development cycle of 35 to 40 days. During winter, these insects remain in the adult stage; during cold weather, they crawl deep into the bark of apple trees or into the leaf litter around the trees. In early spring, after temperatures rise to 6°C, the beetles awaken and move to the upper part of the bark.

The food for weevils is the swelling buds of flowers and leaves on the tree.

These pests primarily prefer various varieties of apple trees, but they can also be found on pear trees. The largest concentrations of beetles are observed on trees located at the edge of the orchard. During the apple tree's blossom season, after the buds open, the insects begin mating. The fertilized female makes a hole in the petals and lays eggs between the stamens. This usually occurs in late April.

The mature larva consumes the pistil and stamens of the flower, and its excrement, left inside the bud, glues the petals together. The damaged flowers first turn brown, then dry up and fall off. The young remain in the bud until their chitinous covering hardens. Then they burrow out and feed on the leaves. Their wings allow the weevils to attack nearby trees.

Damage caused

Weevils are characterized by good fertility: the beetles quickly reproduce and settle in new territories, damaging trees, which negatively affects their healthFruits do not form from buds eaten by larvae.

Buds that fail to open properly are a sign of apple tree pest infestation. Damaged areas are easily visible on a green tree due to their brown color and unsightly appearance. In sunny weather, sap secreted by the affected buds can be seen, as well as small holes containing beetle eggs.

Weevils eat the leaves of faded apple trees, gnawing out delicate holes in them.

Varieties resistant to blossom beetle

For gardeners who lack the time to treat their fruit trees to combat apple blossom beetles, experts recommend growing pest-resistant varieties. These include:

These apple trees are not susceptible to the serious diseases common to other varieties.

Methods of weevil control

Spring is considered the optimal time to get rid of pests. It's recommended to carry out all measures before buds begin to open, which will help prevent the appearance of the flower beetle. There are several ways to eliminate the beetle:

• chemical;
• biological;
• mechanical;
• use of traps.

Effective chemicals

Pesticides are considered the most effective means of getting rid of weevils. The most common of these include:

Processing technique

Most chemicals used to control flower beetles must be diluted with water in the proportions specified by the manufacturer. Spraying is done using a spray bottle, and it is recommended to follow a few guidelines:

• dilute the concentrate according to the measuring instructions;
• carry out the treatment in warm and dry weather, otherwise rain and wind will prevent the composition from penetrating into the affected areas of the apple tree;
• use personal protective equipment (gloves, mask) due to the toxicity of some drugs;
• Work should be carried out at the flowering stage, which will prevent the insecticide from getting into the developing fruit.

It is recommended to spray the product from a distance of 70–90 cm. All parts of the tree should be treated: the trunk, branches, foliage, and the surrounding ground (within a 1-meter radius). Maximum results can only be achieved with the right approach to getting rid of beetles. Experienced gardeners recommend a comprehensive pest control strategy that includes chemical, agricultural, and preventative measures.

Time for processing

The desired results from tree spraying can only be achieved if it's performed in a timely manner. In the spring, this procedure is performed four times:

• through bare apple trees;
• during kidney formation;
• when buds appear;
• after flowering, when the ovaries appear.