- Tytuł:
-
Charakterystyka rozwoju lokalnej populacji zawisaka borowca (Hyloicus pinastri L.) na podstawie występowania larw w latach 1996−2002
Characteristic of the local development of the Hyloicus pinastri L. population on the basis of the occurrence of larvae in the period 1996−2002 - Autorzy:
- Płatek, K.
- Powiązania:
- https://bibliotekanauki.pl/articles/1026611.pdf
- Data publikacji:
- 2003
- Wydawca:
- Polskie Towarzystwo Leśne
- Tematy:
-
foliofagi
wystepowanie
Sphinx pinastri
szkodniki roslin
zawisak borowiec
populacje zwierzat
lesnictwo
larwy
foliophages
hyloicus pinastri
larvae
population - Opis:
- An increase in the abundance of local populations of Hyloicus pinastri L. Lepidoptera, Sphingidae is periodically recorded in many regions of Poland. In the Tuczno Forest District, the occurrences of larvae of this species have been monitored since 1996. The presence of larvae in tree crowns was established from the quantity of falling excrements. The account was taken of the percentage of colonised control trees and the mass of falling excrements. The abundance of larvae in the period of 1996−2002 varied. Since 2000, however, a distinct increase in the percentage of the colonised areas has been noted. In some years, this growth was accompanied by the decline in the amount of falling excrements in individual areas though the general tendency was rising. The likely cause of this decline could be a declining population density due to the expansion of Hyloicus pinastri on other fragments of stands. In 2002, the density of larvae the percentage of the colonised stands was high. This accounts for the dynamic population growth of Hyloicus pinastri in the study area.
- Źródło:
-
Sylwan; 2003, 147, 08; 49-54
0039-7660 - Pojawia się w:
- Sylwan
- Dostawca treści:
- Biblioteka Nauki
Artykuł