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Evaluation of correlation between larvae numbers of the most important pine defoliating insects in Tuczno Forest district in 2000-2002 Ocena korelacji miedzy liczebnosciami larw wazniejszych gatunkow foliofagow sosny w Nadlesnictwie Tuczno w latach 2000-2002



Evaluation of correlation between larvae numbers of the most important pine defoliating insects in Tuczno Forest district in 2000-2002 Ocena korelacji miedzy liczebnosciami larw wazniejszych gatunkow foliofagow sosny w Nadlesnictwie Tuczno w latach 2000-2002



Lesne Prace Badawcze 3: 61-70



In this paper evaluation of mutual correlation between larvae numbers of the most important pine defoliating insects were presented based on their excrements observations. The excrements of pine noctuid (Panolis flammea Den. Et Schiff.; Lepidoptera: Noctuidae) nun moth (Lymantria monacha L.; Lepidoptera: Lymantriidae), sawflies (Hymenoptera: Diprionidae), pine sphinx moth (Hyloicus pinastri L.; Lepidoptera: Sphingidae), pine moth (Dendrolimus pini L.; Lepidoptera: Lasiocampidae), and pine looper (Bupalus piniarius L.; Lepidoptera: Geometridae) were studied. The materials used in this paper were collected in 2000-2002. The analysis of Pearson 's regression and correlation between larvae excrements mass of different pine defoliating insects was done. High, positive values of correlation coefficient have shown strong connections between these species larvae concentration. The higher numbers of one defoliating insects larvae, the higher numbers of other species larvae.

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