Environment is constantly changing under the influence of the various factors and among these factors, climate change manifested as a result of natural impacts or human social evolution comes to the fore for its impact on the plant and fungi. Plant and fungal relations change dramatically, the negative effects of pathogenic fungi to plants and the expansion of the geography of these effects are observed. The activity of pathogens increases against the background of weakening of plants.

The employees of the Mycology Laboratory of the Institute of Botany went on the expedition to Lankaran district. In order to study the fungi associations of wild plants, samples werecollected from various plants in forest ecosystems and identified. Six pathogenic species belonging to the downy mildew (Albugo, Peronospora) and leaf spot pathogens (Colletotrichum, Pestalotia, Septoria) were recorded.

Also in the frame of cooperation agreement signed between the Institute of Botany and Lankaran Regional Scientific Center (LRSC) local and introduced citrus plants grown in the LRSCexperimentalarea were examined, the conditions of cultivation were inspected, certain recommendations were provided to control fungal diseases and some symptomatic leaf specimens were collected. However, no pathogen of serious concernhave beenidentified.