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Requests to determine the cause of damage

Here you can request to determine the cause of the damage. You can view the requests of other users and sort them according to the selected criteria. In addition, you can get information about your request, and you can follow the progress of its current state. If your application was not approved, it had probably been because it was impossible to identify the damage based on the sent photos or because the application does not address our topic - determining the pests of trees and shrubs. We will inform you about the status of your application by email.

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Date
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7470
26.2.2026
A. Kunca
Completed
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7469
26.2.2026
M. Zúbrik
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7456
20.2.2026
A. Kunca
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7455
19.2.2026
M. Zúbrik
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7449
17.2.2026
M. Zúbrik
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7448
17.2.2026
V. Longauerová
Completed
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7442
10.2.2026
J. Galko
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7415
2.2.2026
A. Kunca
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7409
27.1.2026
R. Leontovyč
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7407
27.1.2026
A. Kunca
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Cypress bark beetle
Lykokaz tujovýLykokaz tujový
Cypress bark beetle
Number: 5075
Received 14.9.2024
In progress: 2 days
Date of occurrence: 14.9.2024
Significance: Harmful
Discussion
From: Marek
Assigned: V. Longauerová
Country: Slovakia

Question

v 04/2024 kúpené 200cm, sadene do 40x40x40cm jamy s humusu a cernozemou, do 07/2024 pekné, dosť polievané , hnojené + horká sol, od spodu vysycha

Answer

Dobrý deň,  uschýnanie tují môže mať viacero príčin. Podľa vášho  popisu  môžeme vylúčiť  sucho, nedostatok horčíka, nevhodné stanovište. Podľa príznakov najpravdepodobnejšou príčinou uschýnania  je lykokaz tujový, alebo lykokaz borievkový  Obaja spôsobujú rovnaké škody, a aj ich prítomnosť na rastlinách má rovnaké prejavy. Lykokaz borievkový aj lykokaz tujový sú invazívne škodce, ktoré sa u nás v posledných rokoch značne rozšírili. Vyhovuje im suché a teplé počasie. Vtedy dochádza k premnoženiu. Voľným okom ich spozorujete len ťažko. Lykokazy patria do čeľade podkôrnikovitých, pričom škodia nielen larvy, ale aj dospelé chrobáky. Sú veľmi malé (1,5 až 3 mm) a v našich podmienkach mávajú počas roka jednu generáciu. Prezimované dospelé lykokyzy sa začínajú rojiť keď teplota vystúpi nad 20 °C. O odoch druhoch si viac prečítate tu https://www.skodcoviadrevin.sk/skodca/lykokaz-tujovy https://www.skodcoviadrevin.sk/skodca/lykokaz-borievkovy   Pekný deň.    V. Longauerová
Number of votes for this answer: 1

Pest

Cypress bark beetle

Phloeosinus thujae

Cypress bark beetle

Phloeosinus thujae

hmyz

Received: 14.9.2024
Wood: Tuja
Number: 5075
Date of occurrence: 14.9.2024
Discussion

Add comment: Cypress bark beetle

Web-spinning pine-sawfly
Ploskanka sadenicováPloskanka sadenicová
Web-spinning pine-sawfly
Number: 5073
Received 12.9.2024
In progress: 0 days
Date of occurrence: 12.9.2024
Significance: Harmful
Discussion
From: majo
Assigned: M. Zúbrik
Country: Slovakia

Question

S pozdravom Marián

Answer

Ahoj Majo, myslím, že ten trus by mohol patriť ploskanke sadenicovej, ale obsolútne sa nedá vylúčiť zámena s nejakým príbuzným druhom. Pekný deň M. Zúbrik
Number of votes for this answer: 0

Pest

Web-spinning pine-sawfly

Acantholyda hieroglyphica

Web-spinning pine-sawfly

Acantholyda hieroglyphica

hmyz

Received: 12.9.2024
Wood: Borovica
Number: 5073
Date of occurrence: 12.9.2024
Discussion

Add comment: Web-spinning pine-sawfly

Goat moth
Goat moth
Number: 5068
Received 10.9.2024
In progress: 0 days
Date of occurrence: 8.9.2024
Significance: Harmful
Discussion
From: Arne
Assigned: M. Zúbrik
Country: The Netherlands

Question

The tree has been damages for a year now, big and deep holes at the base of the trunk, about half a meter high. this was the first time I saw the larva eating in the sun. I made a small video here: https://www.youtube.com/watch?v=-6_TRFmnq64 I never saw a caterpillar this big and it looks like it is not native in our country.

Answer

Dear Arne, thank you for your inquiry, the photo, and the interesting information. This is a fairly common species of moth – the goat moth Cossus cossus. Its large larvae feed on the wood of many trees, where they can be quite harmful. In the autumn, they leave their feeding site and look for a place to pupate, which is why they are more frequently encountered during this part of the season. Have a nice day, M. Zúbrik
Number of votes for this answer: 0

Pest

Goat moth

Cossus cossus

Goat moth

Cossus cossus

hmyz

Received: 10.9.2024
Wood: -
Number: 5068
Date of occurrence: 8.9.2024
Discussion

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Cherry leaf spot
Cherry leaf spot
Number: 5067
Received 9.9.2024
In progress: 1 days
Date of occurrence: 9.9.2024
Significance: Less harmful
Discussion
From: gio
Assigned: V. Longauerová
Country: Italy

Question

Answer

Dear Gio, thank you for your request and picture. Cherry leaf spot (Blumeriella jaapii) is an important disease in Europe and America. Bird cherry (Prunus avium) causes the greatest damage. Other host plants include cherry (Prunus cerasus), common apricot (Prunus armeniaca) and common peach (Prunus persica). The pathogen mainly attacks the leaf blades, but exceptionally it can also attack the stems and fruits. Symptoms and harmfulnessParadoxically, unlike many other pathogens, cherry leaf spot primarily attacks older leaves. On the upper side of the leaf blade, distinctly red round spots of 1-2 mm in size are formed. On the underside of the leaf blade, smaller, sharply demarcated reddish-brown to dark brown spots are formed. They are covered with a fine coating of conidia. The spots on the lower and upper side of the leaf blade gradually become necrotic. The leaves gradually turn yellow, deform and subsequently fall. When fruits are attacked, significantly darker, sharply demarcated spots appear on the fruits. Infested fruits are usually deformed. The damage consists in the premature fall of the leaves, which reduces the photosynthetic activity of the tree. Trees have weaker growth, they are susceptible to environmental stress factors such as winter frosts or significant periods of drought. The pathogen results in a qualitative and, in particular, a quantitative reduction of the harvest. Spotting causes a huge problem in fruit nurseries or young plantings, where it slows growth and delays the fruiting period. Development cycleThe pathogen overwinters on fallen leaves, from which the infection spreads in the spring in the form of ascospores. Ascospores are able to infect leaves, stems and fruits in the period of 3-4 weeks after flowering of cherries. The leaves are infected through the stomata and the first symptoms can be observed 2 weeks after infection. Depending on the weather, they are released into the environment for 4-5 weeks. In addition to ascospore infection, conidia are the source of primary and secondary infection in many cases. Wet and rainy weather significantly promotes infection pressure. Infection can only occur if the leaf is wet. In the case of temperature, the optimum conditions for germination are in the range of 15-25 °C. ProtectionThe basis of protection is, first of all, the selection of habitat, variety, and cultivation form. It is important to avoid cold and damp locations, where the conditions for the development of mottledness are optimal. Ensuring an airy and non-compacted crown is important from the point of view of shortening the time of wetness of the leaves and thus preventing the germination of ascospores and conidia. Similar to the case of apple scab, it is also advisable to dispose of the fallen leaves and thereby significantly reduce the infection pressure in the following growing season. In the case of optimal weather conditions for the spread of the pathogen, it is advisable to carry out protection with fungicidal preparations 3-4 weeks after flowering. Preparations that contain the active substances mancozeb, fluopyram+trebuconazole, boscalid+paraclostrobin, dithianone have proven to be suitable. This treatment should be repeated after 10 days. If there is a long dry period during this period, there is no need to apply fungicides. With best regards,  Valeria
Number of votes for this answer: 0

Pest

Cherry leaf spot

Blumeriella jaapii

Cherry leaf spot

Blumeriella jaapii

huby

Received: 9.9.2024
Wood: Cherry
Number: 5067
Date of occurrence: 9.9.2024
Discussion

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Japanese wax scale
Japanese wax scale
Number: 5066
Received 9.9.2024
In progress: 1 days
Date of occurrence: 9.9.2024
Significance: Harmful
Discussion
From: gio
Assigned: M. Zúbrik
Country: Italy

Question

Answer

Dear Gio, thank you for your request and picture. It appears to be a species from the genus Ceroplastes. There are at least four very similar species in your area: Ceroplastes rusci (Fig wax scale), Ceroplastes floridensis (Florida wax scale), Ceroplastes japonicus, and Ceroplastes sinensis (Chinese wax scale). All these species produce waxy coverings that look similar, and they are mainly found in the warmer parts of Europe, particularly in the Mediterranean region. Among these species, Ceroplastes japonicus, Ceroplastes rusci (Fig wax scale), and Ceroplastes floridensis (Florida wax scale) have been reported to infest hawthorn (Crataegus spp.) as a host plant. All of them are polyphagous, meaning they can feed on a wide variety of plants, including ornamental and fruit-bearing species like hawthorn. Identifying these species often requires a detailed examination of their physical characteristics, possibly using a microscope to examine the body structure beneath the wax. There is quite a lot of information about Ceroplastes japonicus on our website. Please visit this page: https://www.forestpests.eu/pest/ceroplastes-japonicus. With best regards, M. Zubrik
Number of votes for this answer: 0

Pest

Japanese wax scale

Ceroplastes japonicus

Japanese wax scale

Ceroplastes japonicus

hmyz

Received: 9.9.2024
Wood: Hawthorn
Number: 5066
Date of occurrence: 9.9.2024
Discussion

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Gall midge Contarinia subulifex
Gall midge Contarinia subulifex
Number: 5063
Received 8.9.2024
In progress: 1 days
Date of occurrence: 8.9.2024
Significance: Less harmful
Discussion
From: majo
Assigned: M. Zúbrik
Country: Slovakia

Question

Answer

Hrčiarka Contarinia subulifex - tento rok hojná. S pozdravom M. Zúbrik
Number of votes for this answer: 0

Pest

Gall midge Contarinia subulifex

Contarinia subulifex

Gall midge Contarinia subulifex

Contarinia subulifex

hmyz

Received: 8.9.2024
Wood: Dub
Number: 5063
Date of occurrence: 8.9.2024
Discussion

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Oak lace bug
Oak lace bug
Number: 5062
Received 8.9.2024
In progress: 1 days
Date of occurrence: 8.9.2024
Significance: Harmful
Discussion
From: majo
Assigned: M. Zúbrik
Country: Slovakia

Question

Answer

Sietnička dubová C. arcuata. S pozdravom M. Zúbrik
Number of votes for this answer: 0

Pest

Oak lace bug

Corythucha arcuata

Oak lace bug

Corythucha arcuata

hmyz

Received: 8.9.2024
Wood: Dub
Number: 5062
Date of occurrence: 8.9.2024
Discussion

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Western conifer seed bug
Western conifer seed bug
Number: 5061
Received 7.9.2024
In progress: 0 days
Date of occurrence: 7.9.2024
Significance: Less harmful
Discussion
Assigned: M. Zúbrik
Country: United Kingdom

Question

Answer

Dear Elize, thank you for a picture of Leptoglossus occidentalis. With best regards M. Zubrik
Number of votes for this answer: 0

Pest

Western conifer seed bug

Leptoglossus occidentalis

Western conifer seed bug

Leptoglossus occidentalis

hmyz

Received: 7.9.2024
Wood: Blackthorn
Number: 5061
Date of occurrence: 7.9.2024
Discussion

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Black pine sawyer beetle
Black pine sawyer beetle
Number: 5060
Received 7.9.2024
In progress: 0 days
Date of occurrence: 7.9.2024
Significance: Harmful
Discussion
Assigned: M. Zúbrik
Country: Spain

Question

Answer

Dear Ignacio, thank you for your reguest. I think on the pictures are galleries caused by Monochamus galloprovincialis - the black pine sawyer beetle. It is cerambycid species. Larvae lives under the bark and pupation take place in the wood. It attack weakened trees. The adults maturation feeding can damage the twigs. It was recently found to be the vector of dangerous pathogenic pine wood nematode Bursaphelenchus xylophilus. With best regards M. Zúbrik
Number of votes for this answer: 0

Pest

Black pine sawyer beetle

Monochamus galloprovincialis

Black pine sawyer beetle

Monochamus galloprovincialis

hmyz

Received: 7.9.2024
Wood: Pine
Number: 5060
Date of occurrence: 7.9.2024
Discussion

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Ganoderma applanatum (= lipsiense)
Lesklokôrovka plocháLesklokôrovka plochá
Ganoderma applanatum (= lipsiense)
Number: 5058
Received 7.9.2024
In progress: 2 days
Date of occurrence: 6.9.2024
Significance: Harmful
Discussion
From: majo
Assigned: V. Longauerová
Country: Slovakia

Question

S pozdravom Marián

Answer

Ahoj Majo ,  podľa foto sa jedná o lesklokôrku plochú.  V.
Number of votes for this answer: 0

Pest

Ganoderma applanatum (= lipsiense)

Ganoderma applanatum (= lipsiense)

Ganoderma applanatum (= lipsiense)

Ganoderma applanatum (= lipsiense)

huby

Received: 7.9.2024
Wood: Topoľ
Number: 5058
Date of occurrence: 6.9.2024
Discussion

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Oak lace bug
Oak lace bug
Number: 5057
Received 6.9.2024
In progress: 0 days
Date of occurrence: 6.9.2024
Significance: Harmful
Discussion
From: Jozef
Assigned: M. Zúbrik
Country: Slovakia

Question

Answer

Monitoring: C. arcuata
Number of votes for this answer: 0

Pest

Oak lace bug

Corythucha arcuata

Oak lace bug

Corythucha arcuata

hmyz

Received: 6.9.2024
Wood: Dub
Number: 5057
Date of occurrence: 6.9.2024
Discussion

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Shaggy pholiota
Šupinovka šupinatáŠupinovka šupinatáŠupinovka šupinatá
Shaggy pholiota
Number: 5055
Received 5.9.2024
In progress: 1 days
Date of occurrence: 5.9.2024
Significance: Harmful
Discussion
From: majo
Assigned: V. Longauerová
Country: Slovakia

Question

sklad dreva S pozdravom Marián

Answer

Ahoj Majo ,  podľa foto sa jedná o šupinovku šupinatú. Viac tu https://www.skodcoviadrevin.sk/skodca/supinovka-supinata V.
Number of votes for this answer: 0

Pest

Shaggy pholiota

Pholiota squarrosa

Shaggy pholiota

Pholiota squarrosa

huby

Received: 5.9.2024
Wood: Buk
Number: 5055
Date of occurrence: 5.9.2024
Discussion

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