TY  -  
T1  - Estimation of Scots pine defoliation by the Common pine sawfly (Diprion pini L.) using multi-temporal radar data 
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UR  - URN:NBN:fi:hulib-201507211902; http://hdl.handle.net/10138/32735 
T3  -  
A1  - Latva-Käyrä, Petri 
A2  -  
PB  - Helsingfors universitet 
Y1  - 2012 
LA  - eng 
AB  - The intensity and frequency of insect outbreaks have increased in Finland in the last decades and they are expected to increase even further in the future due to global climate change. In 1998-2001 Finland suffered the most severe insect outbreak ever recorded, over 500,000 hectares. The outbreak was caused by the common pine sawfly (Diprion pini L.). The outbreak has continued in the study area, Palokangas, ever since. To find a good method to monitor this type of outbreaks, the purpose of this... 
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KW  - Scots pine; defoliation; Diprion pini; SAR; ERS-2; ENVISAT; classification; speckle filtering; männyn neulaskato; luokitus; häilyntäsuodatus; Skogsresursvetenskap och -teknologi; Forest Resource Science and Technology; Metsävaratiede ja -teknologia 
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