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Julius Kühn-Institut (JKI)
Federal Research Centre
for Cultivated Plants

Dr. Ute Katharina Vogler

Messeweg 11/12
38104 Braunschweig, Germany

Ms Kerstin Hansmann and
Ms Margot Knur
Tel: +49 (0)3946 47-7701/-7703
Fax: +49 (0)3946 47-7702
E-mail: g@  julius-kuehn.  de

Branch offices

in  Münster
Toppheideweg 88
48161 Münster, Germany
Fax: +49 (0)251 87106-33

in Kleinmachnow
Stahnsdorfer Damm 81
14532 Kleinmachnow, Germany
Tel: +49(0)33203 48-0
Fax: +49(0)33203 48-425

Institute booklet


Forests are diverse habitats. They have the capacity to constantly regenerate and produce goods as well as services for humans. They also provide habitat for many organisms. Very important is their ability to remove excess carbon from the atmosphere, which is produced by humans especially through the burning of fossil fuels.

Forest insects are also diverse. Most of them are herbivores, which means they feed on plant material (e.g. foliage, bark, roots, seeds) and thus compete for products of human values. Moreover, they can serve as vector of fungi or other agents that cause plant diseases. Particularly outbreaks of insects can cause extensive forest damages. If economic consequences are expected, measures for reducing damages should be taken. Our main focuses are forest pests and human interactions with forests. We are balancing economic, ecological and social requirements to develop economically and ecologically responsible measures for forest protection.

Due to the expected future developments of insect pests in forests existing forest hygienic measures will need modification. Likewise, it is essential to improve the communication between the various stakeholders in the conflict between economy, ecology and social requirements. Therefore, research is needed  when it comes to improving the knowledge of the interrelationships and the effects of natural (insect outbreaks) and anthropogenic (effects of plant protection products) disturbances in forests in order to develop adaptation strategies and measures. These diverse aspects are responsibility and motivation at the same time.

Important topics in this field of activity

Abiotic damages and climate change

larva and pupa on a twig
Pine-tree Lappet (Dendrolimus pini)
  • ŸMonitoring the geographic distribution of thermophilic and human-pathogenic organisms in forest and urban green Ÿ 
  • Testing of various application methods (e. g. cannon sprayer) for using chemical pesticides in plant protection Ÿ 
  • Cultivation of non-indigenous tree species and review of their site suitability

Plant protection products in forests and wooded landscape

plane cruising above treetops
The application of plant protection products by aircraft

For these products we do risk assessment on non-target organisms. Ÿ 

  • Toxic effects on non-target organisms (like pest antagonists) as well as review of environmental aspects and application requirements by using plant protection products Ÿ 
  • Effectiveness of insecticides on forest pests and examination of beneficial insects with a reduced application rate Ÿ 
  • Evaluation of the effectiveness, phytotoxity and resistance of plant protection products in forests (e.g. herbicides, insecticides, rodenticides, repellents) Ÿ 
  • Evaluation of the effectiveness, phytotoxity and resistance of biocide products (insecticides)

Short rotation forestry - ecological consequences

Short rotation coppice in the fifth year
  • Detection of abiotic factors and biotic agents on fast-growing forest trees Ÿ 
  • Documentation and analysis of the habitat potential and biodiversity (e.g. ground-dwelling arthropods) Ÿ 
  • Attempts to improve the growing conditions (weed regulation, use of mycorrhizal fungi)