Forest damages

Forest policy and planning group

Our group conducts research across multiple disciplines, with forest policy and planning as the bearing subjects. The research ranges from forest planning at landscape level to comparative forest

SLU Plant Protection Network kick-off

cajsa.lithell@slu.se Come, meet and connect with others at SLU working within plant protection or plant health. Get to know and help shaping our new SLU Plant Protection Network, and find out what

Methyl jasmonate protects conifer seedlings from pine weevil damage for over a year

Treatment of Norway spruce seedlings with the plant hormone methyl jasmonate (MJ), can effectively reduce insect damage— and this protection can last over a year, according to a recent study from the

Continually active defence important against ash dieback

For almost 30 years, ash dieback has ravaged the ash trees of Europe. Millions of trees are gone, and yet some do survive. We still know little about why that is. A new study from the Swedish

Spruce seeds threatened

Spruce seeds from selected trees are crucial to secure replanting of harvested forest. Unfortunately, the production is lacking, partly due to damages caused by the pathogenic fungus Thekopsora

Are there pests associated with the trade in ornamental plants that pose a high risk to Nordic coniferous forests?

In a recently published study we screened and ranked plant pests potentially associated with trade of ornamental plants to identify pests that could pose a high risk to Nordic coniferous forests. –

Alders lack resistance against aggressive type of pathogen

The risk is high for wide-spread attacks on alder trees in a warmer Sweden. This is the conclusion drawn by SLU scientists after having observed that the alder population will not be able to adapt to

New pathogen particularly aggressive on thirsty, fast growing pines

The pine pathogen Diplodia sapinea earned infamy overnight in 2016, when it was first exposed as the causal agent of a larger disease outbreak in a Swedish pine forest. In a new study, researchers

Media coverage important to public support of actions against invasive species

Invasive species cause great damage in forests, parks and gardens, and political action is needed to prevent and limit new outbreaks. A new study from among others SLU shows that the acceptance

Död ved kan minska risken för insektsskador i skog

The risk of outbreaks of pine sawflies can decrease with more dead wood in the forest, according to a new SLU study. It is most likely due to the fact that the dead wood provides shelter for small

Pruning may save valuable ash trees from death in ash dieback

Pruning infected ash trees may temporarily save them from death caused by ash dieback, but so far there has been a lack of knowledge as to how much to remove of infected branches. A new study from

Decline in tree growth for years following Gremmeniella-infection

Even with less than a fifth of the crown visibly affected, the tree may struggle for years to regain its normal growth rate after a Gremmeniella abietina outbreak. Severely diseased trees may suffer