2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Lepironia Coleoptera is a cruel pest that damages lavender and a number of other essential oil crops. At the same time, not only adults are harmed, but also the gluttonous larvae of lepyronia. The tissues of the shoots damaged by them dry out and gradually crack, which in turn prevents the access of nutrients and water to those parts of them that are located above the sites of damage. Shoots that have been damaged too much lag noticeably in development and growth, become very thinner and are colored in light colors. And some of them bend in waves and subsequently do not bloom at all. The result of attacks of coleopteran lepyronia is a decrease in the mass of inflorescences from 12% to 67%
Meet the pest
The size of the imago of Coleoptera Lepironia is about 5, 1 - 7, 8 mm. Harmful parasites are characterized by a pale brownish color. On their front wings, you can see dark membranes, and the elytra of these voracious scoundrels are decorated with a bizarre diamond-shaped pattern. Incidentally, a distinctive feature of their elytra is their incredible color variability. However, in any case, these pests are very cute. True, a pair of powerful teeth located at the tips of their hind tibia gives them a somewhat predatory appearance.
Slightly curved oblong eggs of Coleoptera Lepironia reach sizes from 0.4 to 1.6 mm. They are convex on the ventral sides, and flat on the dorsal sides. The larvae grow in length up to 5, 7 - 6, 7 mm. On the bodies of individuals that have reached older ages, you can see clear dark spots.
Pest eggs overwinter under the bark of perennial shoots. Approximately at the end of April and at the beginning of May, harmful larvae begin to revive, each of which goes through six centuries of its development. They immediately begin to populate both annual and perennial lavender shoots, with 55 to 96% of pests deployed in the former, and only 40 to 45% in the latter. The larvae concentrate mainly at a height of up to twenty centimeters from the soil surface. Actively feeding individuals form an abundant foam around themselves, which is essentially their secretory fluid. For this they are sometimes called pennies.
In the second half of June, the grown leafhoppers begin to fledge. After the departure of these voracious parasites, you can meet not only on lavender, but also on numerous crops of a number of other agricultural crops. They often concentrate on the edges of fields, in forest belts, as well as on wastelands rich in various herbaceous plants. The leafhoppers feed mainly on leaves, which in turn leads to the formation of extremely unpleasant yellowish spots on the foliage.
Coleoptera lepironia reaches full sexual maturity only with the onset of August-September. Malicious females immediately begin to lay the eggs that remain for the winter. Only one generation of these gluttonous parasites manages to develop per year. By the way, Coleoptera lepyronia is quite widespread throughout the world. Especially often it can be found in the Baikal region.
How to fight
To overcome coleopteran lepyronia, you need to carry out a full range of all the necessary agrotechnical measures. The autumn-spring plowing of the soil will serve well. And on the intercellular roads, the edges of fields and on plantations, it is imperative to destroy weeds.
In the event that there are twenty to twenty-five larvae or more per plant, they switch to insecticide treatments. When working with them, you must observe all the precautions specified in the description of a particular drug.
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