Forest protection

Forest protection

Loss events such as windfall, bark beetle or game damage present an ever re-occurring challenge to forest staff. These very complex relationships need careful evaluation. Therefore extensive knowledge of causes and counter-measures is essential.

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Spreading dynamics of the European spruce bark beetle in the Black Forest National Park

The goal of the research is to identify the locations that are preferred by I. typographus and thus would be particularly at risk for infestation. To achieve this, the specific characteristics of landing sites are analyzed to determine the preferred stand and terrain structures that are preferred during dispersion.

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Verticillium wilt in sycamore

The wilting of shoots and trunk necrosis – the cause of these symptoms in the sycamore is a fungus called Verticillium dahliae. A project was set up to find out where it occurs and whether drought stress favours its development.

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Zigzag elm sawfly recorded in Switzerland for the first time

In June 2017, the zigzag elm sawfly, an invasive species originating in East Asia, was found in Switzerland for the first time, in wych elms in the Canton of Zurich. It has been spreading across Europe since 2003.

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Progressive mortality of Fraxinus species in Austria caused by Ash-dieback, in the context of Europe

Large parts of Europe have been affected by Ash dieback which resulted in massive tree mortality. So what can be learned from the prevention strategies in the countries where this disease has long been ravaging countless forests?

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Bark beetles - a topical issue

The bark beetles are often a problem for spruce trees. To counteract the problem effectively, it is crucial that forest owners and forest managers are well-informed on the issue. You will find answers to the FAQ here.

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Jewel beetles - beneficiaries of dry summers

Jewel beetles, also known as metallic wood-boring beetles, profit in two ways from a dry summer: firstly because the warm summer accelerates their development, and secondly because the forest trees are weakened by the drought.

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Wildfire risk in times of climate change

Climate change is talked about a lot nowadays. Institutions are trying to find possibilities to comply with the 2°C-target to keep climate change in a tolerable dimension. This article is supposed to depict the correlation between climate change and increasing wildfire risk.

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Bark beetles, beware: The three-toed woodpecker!

Three-toed woodpeckers predominantly prey on bark beetles and play a key role in controlling beetle populations in forests dominated by conifers. Their impact is greatest where they occur year-round and thus also breed there. For this, the average deadwood volume needs to be at least 33 m3 per hectare.

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Forest protection with sessile oak

Sessile oak is a highly desired tree species. However, a few of the many residence found living on the tree are causing problems for it. It is particularly precarious for the tree when early and late defoliators appear together.

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Rotting spruce trees – what can be done to control red rot?

Buyers of timber are looking for white, firm spruce timber – and are prepared to pay a good price for it. Reddish discolourations on the other hand are not very popular: beware red rot! Here the problem is not the colour but the decomposition of the wood.

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Heading image: FVA/Hanne Gössl