Competing for space: A case study of horse chestnut leaf miner (Cameraria ohridella) and leaf blotch disease (Guignardia aesculi)

2016 ◽  
Author(s):  
Michal Kopacka
Keyword(s):  
Leaf Miner ◽  
Horse Chestnut ◽  
Leaf Blotch ◽  
Chestnut Leaf

scholarly journals Seasonal Changes and the Interaction Between the Horse Chestnut Leaf Miner Cameraria ohridella and the Horse Chestnut Leaf Blotch Guignardia aesculi

2021 ◽  
Author(s):  
Michal Kopačka ◽  
Gösta Nachman ◽  
Rostislav Zemek
Keyword(s):  
Sampling Site ◽  
Sampling Period ◽  
Leaf Damage ◽  
Leaf Miner ◽  
Invasive Pest ◽  
Horse Chestnut ◽  
Leaf Blotch ◽  
Chestnut Leaf ◽  
The Mathematical Model ◽  
The Relationship

The horse chestnut leaf miner Cameraria ohridella (Lepidoptera: Gracillariidae) is an invasive pest of horse chestnut and has spread through Europe since 1985. The horse chestnut leaf blotch Guignardia aesculi (Botryosphaeriales: Botryosphaeriaceae) is a fungal disease that also seriously damages horse chestnut trees in Europe. The interaction between the leaf miner and the fungus has not yet been sufficiently described. Therefore, the aim of the present study was to assess leaf damage inflicted to horse chestnut by both C. ohridella and G. aesculi during the vegetation season and to model their interaction. The damage to leaf area was measured monthly from May to September 2013 in České Budějovice, the Czech Republic. A simple phenomenological model describing the expected dynamics of the two species was developed. The study revealed a significant effect of sampling site and sampling period on the damage caused by both the pest and the fungus. The mathematical model indicates that infestation by C. ohridella is more affected by G. aesculi than vice versa. The possible mechanisms affecting the relationship between G. aesculi and C. ohridella are discussed.

scholarly journals Seasonal Changes and the Interaction between the Horse Chestnut Leaf Miner Cameraria ohridella and Horse Chestnut Leaf Blotch Disease Caused by Guignardia aesculi

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 952
Author(s):  
Michal Kopačka ◽  
Gösta Nachman ◽  
Rostislav Zemek
Keyword(s):  
Fungal Pathogens ◽  
Insect Pests ◽  
Leaf Damage ◽  
Leaf Miner ◽  
Invasive Pest ◽  
Horse Chestnut ◽  
Leaf Blotch ◽  
Chestnut Leaf ◽  
The Mathematical Model ◽  
The City

The horse chestnut leaf miner Cameraria ohridella (Lepidoptera: Gracillariidae) is an invasive pest of horse chestnut Aesculus hippocastanum (Sapindales: Sapindaceae) and has spread through Europe since 1985. Horse chestnut leaf blotch is a fungal disease caused by Guignardia aesculi (Botryosphaeriales: Botryosphaeriaceae) that also seriously damages horse chestnut trees in Europe. The interaction between the leaf miner and the fungus has not yet been sufficiently described. Therefore, the aim of the present study was to assess leaf damage inflicted to horse chestnut by both C. ohridella and G. aesculi during the vegetation season and to model their interaction. The damage to leaf area was measured monthly from May to September 2013 in České Budějovice, the Czech Republic using digital image analysis of sampled leaves. A simple phenomenological model describing the expected dynamics of the two species was developed. The study revealed that the damage caused by both the pests and the fungus varied significantly among sampling sites within the city. The overall leaf damage exceeded 50% in no-raking sites in August. The mathematical model indicates that infestation by C. ohridella is more affected by G. aesculi than vice versa. Guignardia aesculi is thus the superior competitor of the two species. Our findings highlight the delicate interplay between insect pests and fungal pathogens and the spatiotemporal dynamics influencing them, calling for more research in this understudied area.

scholarly journals Diversity and abundance of Phytoseiidae (Acari: Mesostigmata) on horse chestnut (Aesculus hippocastanum L.) in an urban environment: a comparison between Greece and the Czech Republic

Acarologia ◽  
2018 ◽  
Vol 58 (Suppl) ◽  
pp. 83-90
Author(s):  
Michal Kopačka ◽  
Theodoros I. Stathakis ◽  
Georgios Broufas ◽  
Georgios Th. Papadoulis ◽  
Rostislav Zemek
Keyword(s):  
Czech Republic ◽  
Population Density ◽  
Leaf Miner ◽  
Aesculus Hippocastanum ◽  
Horse Chestnut ◽  
Mixed Forests ◽  
Phytoseiid Mites ◽  
Leaf Blotch ◽  
Euseius Finlandicus ◽  
Chestnut Leaf

Horse chestnut, Aesculus hippocastanum L. (Sapindaceae), is a large deciduous tree native to a small area in the Pindus Mountain mixed forests and the Balkan mixed forests of Southeast Europe. It was introduced to most countries in Europe mainly for ornamental purposes. The aim of the present study was to assess the occurrence, species composition and population densities of phytoseiid mites on A. hippocastanum in countries where this tree species is autochthonous and to compare them with Central Europe. In addition, we tested whether the horse chestnut leaf miner, Cameraria ohridella or the horse chestnut leaf blotch, Guignardia aesculi has any effect on Phytoseiidae population density. Leaf samples were collected in the cities of České Budějovice, Czech Republic and Orestiada, Greece in September 2013 and 2015, respectively. Thirty compound leaves were randomly taken from tree branches up to 2.5 m above ground in both localities. Mites were collected by washing the leaves in ethanol and were then mounted in lactic acid and identified. A total of 441 specimens of phytoseiid mites belonging to six species (Euseius finlandicus, Neoseiulella tiliarum, Kampimodromus aberrans, Paraseiulus talbii, Phytoseius macropilis and Typhlodromus (Typhlodromus) pyri) were collected. A significantly higher population density of Phytoseiidae was found in České Budějovice. The density was not affected by the horse chestnut leaf miner, Cameraria ohridella or the horse chestnut leaf blotch, Guignardia aesculi. Euseius finlandicus was the predominant species in both České Budějovice (96.8%) and Orestiada (48.4%) where, however, it competed with K. aberrans (42.9%).

scholarly journals Effect of the outbreak of horse-chestnut leaf miner (Cameraria ohridella Deschka & Dimić) on tree-ring width in common horse-chestnut (Aesculus hippocastanum L.)

2021 ◽  
Author(s):  
Anna Cedro ◽  
Grzegorz Nowak
Keyword(s):  
Growth Rate ◽  
Tree Ring ◽  
Insect Pest ◽  
Ring Width ◽  
Leaf Miner ◽  
Horse Chestnut ◽  
Climate Response ◽  
Tree Ring Width ◽  
Temperature And Precipitation ◽  
Chestnut Leaf

Abstract Common horse-chestnut is frequently infested by the insect pest horse-chestnut leaf miner [HCLM; Cameraria ohridella (Deschka & Dimić, 1986), Gracillariidae, Lepidoptera]. The larvae, feeding on leaf parenchyma, cause browning and dehydration of leaves, which may be shed as early as in summer. The major aims of this study were: (1) to assess the effect of infestation by HCLM on ring-width dynamics in common horse-chestnut; (2) to determine the date of invasion of the pest; and (3) to compare the growth-climate response in the period before and after the invasion of HCLM. In 2017 in north-western Poland, samples from 30 horse-chestnut trees for the dendrochronological analysis were taken with help of a Pressler increment borer. The ring-width chronology was developed using standard dendrochronological methods. Dendroclimatological analyses were made in 2 periods: before the determined date of HCLM invasion (till the year 1999) and after the invasion (in 20002016). In 2000, in spite of favourable weather conditions, a reduced growth rate was observed in 91% of the analysed trees. The period of strong reductions lasted till 2010. Before the invasion, radial growth rate was dependent on temperature and precipitation in May and June of the current year, whereas after the invasion, the growth-climate response was dependent on temperature and precipitation in the preceding year and the correlation was stronger. Surprisingly, in recent years (2011–2016), in spite of infestation by HCLM every year, the health condition of the analysed trees has improved and tree-ring width has increased.

scholarly journals Ultrastructural and biochemical comparison of summer active and summer diapausing pupae of the horse chestnut leaf miner, Cameraria ohridella (Lepidoptera: Gracillariidae)

2015 ◽  
Vol 112 (1) ◽  
pp. 197-203 ◽  
Author(s):  
Frantisek WEYDA ◽  
Jitka PFLEGEROVA ◽  
Tereza STASKOVA ◽  
Ales TOMCALA ◽  
Eva PRENEROVA ◽  
...  
Keyword(s):  
Leaf Miner ◽  
Horse Chestnut ◽  
Biochemical Comparison ◽  
Chestnut Leaf
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