The studies were carried out over the year
2010 in a 18 years old cherry tree orchard, at S.C.
Fructex S.A. Bacau. The invertebrates
communities of the epigean fauna in 2010 include
species belonging to 8 classes, 12 orders and 22
families with an amount of 7083 individuals. The
Insect class is about 55.88% of the whole
collected material. According to the relative
abundance of the trophic categories, we can say
that the structure of the invertebrates communities
of the epigean fauna is well-balanced, the
ecosystem is stable, due to the age of the cherry
tree culture and on the other hand due to the lack
of the chemical treatment. The study of the
canopy insect pests highlighted two categories of
insect pests: endophagous species, especially
leafmining insects and ectophagous species,
respectively aphids and ectophagous insect
larvae. However, even if the frequency of attack
of both endophagous and ectophagous species has
recorded high values, we found that the intensity
of attacks did not reach pest economic threshold. |