@ARTICLE{Szafranek_Janusz_Chemometries_2001, author={Szafranek, Janusz and Nawrot, Jan and Szafranek, Beata and Maliński, Edmund}, number={No 4}, journal={Journal of Plant Protection Research}, pages={372-377}, howpublished={online}, year={2001}, publisher={Committee of Plant Protection PAS}, publisher={Institute of Plant Protection – National Research Institute}, abstract={The process of plant selection by insects is mediated by repellents and attractants. Several compounds may be involved in this interaction. Thus intraspecific variation of the compounds concentration play an important role in the herbivory. The best tool for the characteristic of this variation is chemometrics. The strategy of the analysis with the use of literature data on terpen es and sesquiterpenes variations in Pin us caribaea needles in relation to Atta laevigata herbivory is exemplified herein. Simple cluster analysis and principal components analysis were used for the data study. Two factors were found lo be sufficient to describe total variation in more than 90%. Factor I is responsible for repellent properties. From factor loading, the relevant chemical compounds were identified.}, type={Article}, title={Chemometries as a tool for plant- insect ecological studies}, URL={http://czasopisma.pan.pl/Content/131201/PDF-MASTER/10_PLANT_41_4_2001_Szafranek_Chemometrics.pdf}, keywords={chemometrics, pine needles, ants, terpenes, sesquiterpenes}, }