Biological control by entomopathogenic nematodes in Bosnia and Herzegovina

ISHS Secretariat
Biological control by entomopathogenic nematodes in Bosnia and Herzegovina

I am Branimir Njezic, a PhD student at the University of Banja Luka, Faculty of Agriculture, Bosnia and Herzegovina. I am in the last year of my PhD thesis supervised by Prof. Dr. Ralf-Udo Ehlers. I work on biological control of the most important pests of plum (plum sawflies, Hoplocampa flava and H. minuta) using entomopathogenic nematodes (EPN). The only currently available measure for farmers to control plum sawflies are synthetic insecticides. They are applied at the time of petal fall, when beneficial organisms are present in the orchards. Moreover, farmers in organic production do not have available methods to control these pests. Since plum sawflies spend part of their life cycle in the soil, they are potentially a good target for EPN. In this study, larval and adult stages of plum sawflies have been shown to be susceptible to EPN, in both laboratory and field conditions. For registration of biological control agents in Bosnia and Herzegovina, it is required by law that presence of the species has been confirmed in natural habitats of the country. A national survey on presence of EPN has been conducted for species S. feltiae, S. carpocapase, S. kraussei and H. bacteriophora. To have a more efficient control by EPN, it is necessary to apply nematodes as close as possible to the appearance of the target stage. To optimize application, a temperature-dependent model of adult plum sawfly emergence was developed.

Branimir Njezic won an ISHS Young Minds award for the best oral presentation at the II International Symposium on Fruit Culture along Silk Road Countries in Bosnia and Herzegovina in October 2017.

Branimir Nježić, University of Banja Luka, Faculty of Agriculture, Bulevar vojvode Petra Bojovica 1A, 78 000 Banja Luka, Bosnia and Herzegovina, e-mail:

The full article is available in Chronica Horticulturae

Young Minds Award Winners