Hortobionts. Faunistic studies allowed to establish that the available entomofauna
of hortobionts is represented in 7 rows, which number 29 families in a total number of
107 species. Thus, the available entomological agrobiodiversity in comparison with the
known number of species decreased by almost 40%. The number of families in recent
years dominated by a number of Homoptera (10 families), followed by Diptera – 6
families. The smallest number of families has a number of Lepidoptera – 1 family. By
number of species the most abundant is the number of homoptera (38 species), the least
abundant – a series of Lepidoptera (2 species).
A comparative taxonomic analysis of the entomological fauna of hortobionts
based on the results of analytical and faunal studies is shown in Fig. 2. As it can be
seen from the above data, in the last decades the number of families of Coleoptera and
Diptera series has remained stable, but the number of families of the Lepidoptera
family has decreased by 10 times. There is also a noticeable depletion of families of
other series of hortobionts.
Figure 2. Species diversity entomofauna of hortobionts of agricultural
landscapes of the forest-steppe of Ukraine on the basis of analytical and faunal
studies
The obtained data indicate that reduction of the level of biodiversity of hortobionts
was mainly due to the number of Lepidoptera: 2 species against known in the twentieth
century 47 species, which may be due to the peculiarities of the biology of butterflies.
It is known that they feed on plants at the caterpillar stage. This stage is most vulnerable
to the action of pesticides and other anthropogenic pollutants, due to the relatively
0
13
25
38
50
39
14
30
18
47
7
18
38
15
14
17
2
3
18
Number
of
v
arit
ies
,
spec
imen
Known
Determined
- 1350 -