Investigations
on Control Efforts and the Biology of Cryphalus piceae
(Ratz) (Coleoptera: Scolytidae)
and Pityokteines curvidens
Demaged in Artvin
Spruce Forests
Yaşar Aksu1 Cihangir
Dedeağaoğlu1 Berna Çelik Göktürk1
1Forestry Regional Directorate in Artvin/Turkey
y_aksu3@hotmail.com
Abstract
The
height of mature Pityokteines curvidens
male is 2.7-3.2 mm and female is 2-2.6 mm. They generate twice in a year. First
flight time is late April and early may and second flight time is began third
week of June and continued to July or middle of August. Males are firstly
attaining to trees and then females attain for to breeding. Male P. curvidens is copulate one female as
rule. If two female attains, male build up double parenthesis roads. The length
of the main road is 5 to 10 cm and 1 mm width. The length of the larva road is
6 to 7 cm.
The
height of the Cryphalus piceae is 1.1
to 1.8 mm. They generate once or twice time in a year. First flying time is
March-April and second is June. The shape of the main road is shape. They lay
20 to 40 eggs. Both of these insects damaged the same trees. They survive under
the bark along the winter as an adult.
Control
efforts are carried out in 2009 by cutting two trap trees in a hectare in all
130 hectare fir stands damaged by C. piceae. The number of 1 705 380 P. curvidens annihilated with control
efforts carried out between 2002 and 2011 by putting 955 number pheromone traps
over the 545 hectare forest patches. It was determined that 91% of P. curvidens adults caught firstly by
pheromone traps is male and 9% of is female. Both insect species induced
individual mortality of trees. Damage rates reduced by carrying control efforts
out where they population goes to increase. Although, P. curvidens damages generally fir trees, it was determined that it
also damages individual spruce trees. C.
piceae is firstly bothered to trees and weakened to it, thus, it prepare to
bother conditions to P.curvidens. C. piceae
prefer thin barked trees as rule. Pheromone
traps, It was determined that adults
of Thanasimus formicarius, Rhizophagus depressus, Rhizophagus
dispar and Rhizophagus
sp also fell besides P.curvidens. Predatory insects per trap, control nature, are
emitted during the
Key words: Pityokteines
curvidens, Cryphalus piceae, trap
trees, pheromone traps.
Yayın yeri: Aksu, Y.; Dedeağaoğlu, C.; Göktürk, Ç, B.; Investigations on control
efforts and the biology of Cryphalus
piceae (Ratz) (Coleoptera: Scolytidae) and Pityokteines curvidens demaged in Artvin. spruce forests.
Kastamonu Üniversitesi Orman Fakültesi,
14. Uluslararası Göknar Sempozyumu, Abstracts Book 2012 Sayfa 57 Kastamonu.