2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Cherry pipe-worm loves to feast on not only cherries and cherries - his range of taste preferences also includes blackthorn with apricot and plum with hawthorn. In this case, beetles and larvae harm fruit trees with equal force. Beetles gnaw numerous holes in tiny buds, roughly eating at the same delicate stamens with pistils. In addition, they often gnaw the leaves and completely destroy the forming ovaries. And the nutrition of harmful larvae can reduce the fruit mass of cherries up to 30%, and cherries - up to 50%
Meet the pest
The cherry pipe-runner is a voracious bug, reaching about 6 - 8 mm in size. Its body, covered with light, thick hairs, is painted in golden-greenish tones with a spectacular crimson metallic sheen. The bright purple rostrum of voracious parasites has slightly darkened apices, and their pronotum is slightly rounded on the sides from above. Their eyes are weakly convex, round and relatively small, and the large shields of cherry tubewerts have rounded tops. On the sides of the prothorax of males, there are two pointed spines directed to the sides, and the length of their elytra, dotted with regular rows of punctures, is one and a half times longer than their width.
The size of the oval white eggs of cherry tubewerts is 0.4 mm. And the light yellow larvae, growing up to 8 - 9 mm, are endowed with sparse hairs on the body and tiny brownish heads. The legs of the larvae are absent, and their bodies are arcuate. Shiny pupae 6 - 8 mm in size are painted in light yellow tones. Their eyes are grayish-brown and rather convex, the body is covered with sparse reddish hairs, and at the very tips of the abdomen there are a pair of tiny spines.
Immature bugs, like the larvae, overwinter at a depth of ten to fifteen centimeters in the soil. Some bugs get out of the soil about three to four days before the flowering of fruit trees, and their mass release occurs during the flowering period of sweet cherries. Cherry tube-worms are especially active in sunny and rather warm weather - when cloudy and cold weather is established, the pests sit motionless in the axils of the shoots, stretching the antennae with rostrum forward.
The bugs that come out feed additionally, and ten to twelve days after the cherry blossoms, they mate, followed by laying eggs, which lasts about twenty-five to thirty days, right up to the hardening of the cherry pits. The total fertility of females reaches hundreds or one and a half hundred eggs.
The larvae, reborn after nine to twelve days, instantly make their way inside the bones and for about twenty three to thirty days they actively feed on the nucleoli. Once the cherries are ripe, the larvae will stop feeding. Individuals who have completed feeding leave the fruits, after which, falling to the ground, they immediately burrow into the ground. There, at a depth of ten to fifteen centimeters, they equip waterproof spherical cradles with well-tamped and abundantly saliva-soaked walls. And in August-September, about 60% of the larvae pupate in these shelters, and after twelve to fifteen days they turn into bugs that remain in the soil until spring. The unpupted part of the larvae falls into diapause, in which it stays until August or until September of the next season. Accordingly, one part of cherry pipe-runners is characterized by a one-year generation, while the other part is a two-year one.
How to deal with tubovert
Both in the aisles and in the near-trunk circles, it is necessary to carry out a thorough autumn tillage. Such cultivation will be especially effective during the mass pupation of voracious larvae.
If there are more than eight bugs per tree, about four to six days after the cherry blossoms, the cherry trees are sprayed with insecticides.
Cherry pipe-runners also have natural enemies - the eggs laid by them often infect predatory chalcids. And the naughty riders mercilessly deal with the larvae.
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