Volume 03 Issue 05-2023
17
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
The article provides information about the economic importance of the species "Deroceras reticulatum Muller" and
"1774 Candaharia levanderi Simroth, 1901" found in the village of Machai, Boysun district.
KEYWORDS
Boysun District, Machai Village, land molluscs, Deroceras reticulatum, Candaharia lavender, economic importance.
INTRODUCTION
Considering the economic importance of land molluscs
from an economic point of view, firstly, according to
the literature [5, 6], most land molluscs act as
intermediate hosts in the spread of various helminthic
diseases, and secondly, molluscs are herbivorous
polyphagous animals, and one species can cover a wide
range of plants, especially which is a source of human
food: strawberries, cabbage, tomatoes, cucumbers,
Research Article
ECONOMIC SIGNIFICANCE OF "DEROCERAS RETICULATUM MULLER"
AND "1774 CANDAHARIA LEVANDERI SIMROTH, 1901" SPECIES
Submission Date:
May 08, 2023,
Accepted Date:
May 13, 2023,
Published Date:
May 18, 2023
Crossref doi:
https://doi.org/10.37547/ajahi/Volume03Issue05-04
Abdulazizova Shoira Karimovna
Termez State University, Docent. Termez. Uzbekistan
Norkobilova Ugiloy Kholmumin Kizi
Termez State University, Master. Termez. Uzbekistan
Abdulloeva Dilnoza Boboismoilovna
Termez State University, Master. Termez. Uzbekistan
Rashidova Gurdofarid Erkinovna
Termez State University, Master. Termez. Uzbekistan
Kayimova Nodira Ravshan Kizi
Termez State University, Student. Termez. Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajahi
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 03 Issue 05-2023
18
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
sprouts of all legumes and vegetables, leguminous
crops, especially winter wheat and barley from grain
crops.
In general, when talking about the economic
importance of land molluscs, it should be noted that
their economic damage can be different in different
regions. For example, if the fodder plants of Boisun
mountain range are severely damaged by "C.
lavender", this species is infected with helminth larvae
in Kohitang mountain range and acts as an
intermediate host.
In general, all terrestrial molluscs are herbivorous
polyphagous animals, but slime worms cause more
damage to plants than shell molluscs, and a number of
species are considered plant pests.
For example, "D. reticulatum" lives mainly in open
biotopes. In more anthropogenic biotopes, they live
under branches, rocks, in earth cracks, and the damage
caused by them differs from the damage caused by
other pests. They damage different types of plants in
different ways.
"D. reticulatum" species is one of the most voracious
slimes, and their intensive feeding on plant leaves or
fruits depends on the air temperature. It was
determined that this species fed on cucumbers planted
in the open fields in Machai village, Boisun district, and
caused damage to cucumber seedlings (Table 1).
Table 1
Damage caused to cucumber seedlings by Dinoceras reticulate species (on 10 m
2
area)
Research
line
The number
and
condition of
seedlings
(two ears)
The number of cucumbers
Total
infected
cucumber
seedlings in %
Undamaged
seedlings
Damaged
part of the leaf
plate is eaten
(pictures 5.2-1.2)
two
leaves
completely
eaten
(Fig.
5.2-3)
1-raw
35
17
7
11
51,4
2- raw
35
19
7
9
45,7
3- raw
35
21
8
6
40
4- raw
35
23
5
7
34,3
Volume 03 Issue 05-2023
19
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
5- raw
35
25
6
4
30,3
6- raw
35
25
6
4
28,6
7- raw
35
20
8
7
42,8
8- raw
35
18
8
9
48,5
9- raw
35
17
12
6
51,4
10- raw
35
16
10
9
54,2
Total
350
201
77
72
42,57
Table 1 data analysis shows that there are a total of 350
cucumber seedlings in a 10 m2 area, of which a total of
149 seedlings are affected to varying degrees. The
damage rate is higher in the outer lanes and decreases
as you move towards the middle lanes. This is due to
the fact that the place where the slugs live is close to
the outer rows and the population density is high, so
the level of damage to the seedlings is also high. As you
go to the middle rows, the number of slugs decreases,
and accordingly, cucumber seedlings are less
damaged.
D. reticulatum also damages cucumber fruit to varying
degrees from the end of May to the beginning of June.
It mainly starts eating the cucumber fruit by first
carving the skin part from a certain place and ends up
eating 30-40% of the fruit completely. Also, D.
reticulatum species is common in biotopes in the hilly
region, and feeds on the soft part of the leaves of
various plants. For example, 4 maggots eat a plant leaf
15 times larger in 1.5 hours.
Another economic importance of land molluscs is that
they act as intermediate hosts in the transmission of
dangerous helminth diseases in many mammals and
birds.
According to the literature [1, 4, 5, 6], all 8 types of
nudibranchs distributed in the studied area act as
intermediate hosts to one degree or another.
Currently, the taxonomic composition of terrestrial
molluscs that participate as intermediate hosts of
helminths in Uzbekistan A. Pazilov, A. Kuchbaev [5],
the taxonomic composition of helminth larvae found in
terrestrial molluscs A. Kuchbaev [2], A.E. Kuchbaev, M.
Egamberdiev and others. is being studied by [3].
However, the study of the degree of contamination of
land mollusks with helminth larvae, which are common
in the Surkhan-Sherabad valley and its surrounding
mountains, is currently fragmentary. This problem
remains open in the rest of the regions, while it was
partially studied by [3].
Therefore, we have studied the level of helminth larvae
infection of some species common in the study area.
Volume 03 Issue 05-2023
20
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
Among the common land molluscs that participate as
an intermediate host in the study area, C. lavenderi
species is the dominant species in terms of population
density compared to other species. This species is
common in all altitude regions.
The degree of infection of C. lavenderi species with
helminth larvae was studied in the southeastern part of
the Kohitang mountain range from the village of
Aktash to the village of Vandob and from there in the
north-west direction, in the areas of the Vandob
section of the Surkhan state reserve.
According to the results of the conducted research, the
species C. lavenderi is unevenly distributed by altitude
regions and biotopes. For example, in the desert
region: among the grass on the banks of streams,
under the trees in gardens, among the plant cover in
the undeveloped areas of the land near water bodies,
in the hill region: on the slopes where semi-shrub
plants grow and among the stone piles, in the stone
piles between the grass in the land near the water
bodies, in the mountain in the region, among shrubs
and trees, living under stones between grass plants,
the population density and level of helminth
infestation are as follows (Table 2).
According to the data in the table, the dynamics of
invasion of C. lavenderi species by helminth larvae
differ by biotopes and altitude regions. For example, in
the desert region, 1 out of 60 molluscs distributed
among plants under trees in gardens is infected with
larvae, and the infestation is equal to 1.66%, while in
those living among vegetation in undeveloped areas
near water bodies, the infestation is equal to 12.30%, in
the hilly region, the same and in such a biotope, this
indicator is 13.33%. In the mountain region, 1 out of 60-
65 molluscs is affected, equal to 1.53%, 1.66%.
Table 2
Distribution of the species C. lavenderi by altitude regions and biotopes and infestation level by helminth larvae
Researched
biotopes
and
the
population
density
of
molluscs in them
Altitude regions
Desert
Hill
Mountain
To
ta
l studi
ed
Damaged
IE
%
To
ta
l studi
ed
Damaged
IE
%
To
ta
l studi
ed
Damaged
IE
%
Between the grass
on the banks of the ditch
(7-8 per 1m2)
5
5
3
5,
45
-
-
-
-
-
-
Volume 03 Issue 05-2023
21
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
Between
plants
under trees in gardens (5-6
per 1m2)
60
1
1,66
-
-
-
-
-
-
Vegetation cover in
undeveloped areas near
water bodies (10-12 per
1m2)
65
8
12,3
-
-
-
-
-
-
Slopes with semi-
shrub plants (8-9 per 1m2)
-
-
-
60
4
6,66
-
-
-
Between
grasses
and under piles of stones in
lands near water bodies
(13-15 per 1m2)
-
-
-
60
8
13,33
-
-
-
Between shrubs and
trees (12-14 per 1m2)
-
-
-
-
-
-
65
1
1,53
Volume 03 Issue 05-2023
22
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
Under
stones
between grasses (10-12 per
1m2)
-
-
-
-
-
-
60
1
1,66
According to the results of the research, the high level
of invasion of land molluscs distributed in biotopes
with helminth larvae depends on the density of the
mollusc population based on the characteristics of the
biotope and its microclimate. For example, in the
desert region under the vegetation cover of
undeveloped areas near water bodies or in such a
biotope in the hilly region, the population density of
molluscs is high (12-15 molluscs per 1 m2), and the level
of infestation with helminth larvae is 12.30% to 13.33%.
constitutes
Therefore, the higher the density of molluscs in the
population, the higher the level of infestation with
helminth larvae.
However, in the mountain region of the Kohitang
mountain range, the population density of molluscs is
high, but the invasion rate is low (Table 2). This is due
to the fact that the research area in the mountain
region is in the Vandob section of the Surkhan State
Reserve, and the use of these lands as pasture is
prohibited. This situation results in less contact
between the mollusc and the larva, and accordingly
infestation may be lower.
According to the results of the conducted research,
slugs cause great damage to strawberries, cabbage,
tomatoes, cucumbers, sprouts of all polys and
vegetable crops, legumes, grain crops, winter wheat
and barley, including D. reticulatum species to a
significant extent to cucumber sprouts and fruits. will
cause damage.
It was found that the level of mollusk damage to plants
is directly related to air temperature, humidity and
their density in the population.
The high level of infestation of land molluscs with
helminth larvae depends on the density of the mollusk
in the population based on the nature of the biotope
and its microclimate, that is, the higher the density in
the population, the higher the level of infestation of
the mollusk with helminth larvae.
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American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
03
ISSUE
05
Pages:
17-23
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
(2023:
7.
471
)
OCLC
–
1290679216
Publisher:
Oscar Publishing Services
Servi
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