Naslov
INFLUENCE OF OAK LACE BUG ON RADIAL INCREMENT OF PEDUNCULATE OAK TREES WITHIN DIFFERENT AGE CLASSES IN SPAČVA BASIN AREA

Autori
Božić, Mario ; Klem, Marko ; Goršić, Ernest ; Bazijanec, Ivan ; Franjević, Milivoj ; Kolar, Antonija

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Natural resources, green technology & sustainable development / Redovniković, Ivana R. ; Jakovljević, Tamara ; Stojaković, Renata ; Erdec, Dina ; Damjanović, Anja - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2022, 164-164

Skup
4th Natural resources, green technology and sustainable development/4 (GREEN2022)

Mjesto i datum
Zagreb, Hrvatska, 14.09.2022. - 16.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
climatic factors ; oak lace bug ; pedunculate oak ; radial increment ; stand age

Sažetak
In the last few years, in the pedunculate oak forests, there has been a wide spread of an alien invasive species Corythucha arcuata Say, 1832 (Heteroptera: Tingidae), the oak lace bug (OLB). OLB attack is manifested in leaf sap sucking, which results in the gradual leaf mass deterioration throughout the vegetation period. This paper investigates the oak lace bug influence on the pedunculate oak radial increment in stands of different ages. The research was conducted in a young, middle-aged and old pedunculate oak stand, in the area of Spačva basin, where the OLB first appeared in Croatia. Increment trends from fifteen trees sampled on each plot were analized. The increment trend after 2014 is negative in all three stands. The increments in 2016, and especially in 2014, were significantly higher than the increments before the appearance of oak lace bug (2013). By comparing annual increments with climatic factors, a significant positive correlation of increments with precipitation and a negative one with average temperatures were observed. The extremely low increment in 2012 is probably due to the extremely low rainfall combined with the above-average high mean temperature in July and August of that year compared to the 20-year average. Significantly higher increments in 2014 and 2016 were due to high rainfall and lower mean temperatures during July and August, as well as weaker impact of the oak lace bug on oak physiology due to sufficient nutrients and lower temperatures at which there is no intensive feeding with leaf sap. These results indicate that the OLB has a negative impact on the radial growth of oak trees, but that the dominant influence for now are climatic factors. In the negative trend of growth after the OLB appearance, it is currently difficult to distinguish which part falls on climatic factors and which on OLB, especially since they interact with each other.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo, Biotehnologija

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