American Journal Of Agriculture And Horticulture Innovations
7
https://theusajournals.com/index.php/ajahi
VOLUME
Vol.05 Issue04 2025
PAGE NO.
7-9
10.37547/ajahi/Volume05Issue04-02
Insecticidal Activity Of The New PILARURON 50% SC
Preparation Against Melon Aphid Aphis Gossypii Glov
(Hemiptera:Aphididae) On Greenhouse-Grown Tomato
Plants
Alamuratov Rayimjon Abdimurat o‘g‘li
Institute of Plant Quarantine and Protection Research, Uzbekistan
Abdillayev Marat Ibodillayevich
Institute of Plant Quarantine and Protection Research, Uzbekistan
Sattorov Shoximardon Xushmamatovich
Institute of Plant Quarantine and Protection Research, Uzbekistan
Received:
09 February 2025;
Accepted:
12 March 2025;
Published:
08 April 2025
Abstract:
In this article, experimental trials were conducted to evaluate the efficacy of a new insecticide
formulation, PILARURON 50% SC, against Aphis gossypii Glov., a pest currently infesting greenhouse-grown
tomatoes in our Republic and negatively affecting crop quality. The product was tested at an application rate of
0,8
–
1,2 liters per hectare, and its insecticidal activity was determined.
Keywords:
Agriculture, vegetables, tomato plant, pest damage, chemical control measures, insecticidal activity.
Introduction:
Aphids that harm agricultural crops are
soft-bodied, small insects, with adults measuring 1,8-
2,1 mm in length. They occur in both winged and
wingless forms. The winged forms possess two pairs of
wings, with the forewings being significantly longer
than the hindwings. Their development is incomplete
and typically parthenogenetic, involving live birth with
no pupal stage. Aphid populations consist of different
morphological forms, including viviparous wingless
females, oviparous wingless females, viviparous
winged females, and winged (sometimes wingless)
males [6;8;9].
In greenhouses, two widespread aphid species - Aphis
gossypii Glov (melon aphid) and Aphis craceivora Koch
(cowpea aphid) - cause considerable damage to a wide
range of host plants [10]. Aphids are a serious problem
in greenhouses, where favorable environmental
conditions allow them to reach high population
densities in a short time throughout the year. The
traditional method of controlling these pests in
greenhouse conditions is through the use of
insecticides [11].
According to conducted research, several species of
aphids, which are sucking pests, cause damage in
tomato fields. When tomato plants are affected during
the seedling stage, it often results in plant death. If
infestation occurs later, more than 50% yield loss can
be observed [5].
Many species of aphids infest tomato plants from the
emergence of the first leaves to the end of the
vegetation period, feeding on the leaves, stems, and
fruits. This feeding process inhibits the growth and
development of the plants. Additionally, the sticky
honeydew secreted by the pests contaminates the
lower leaf surfaces, disrupting the plant’s metabolic
processes and thereby reducing both the yield and
quality of the crop [1;3;4].
METHODS
American Journal Of Agriculture And Horticulture Innovations
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American Journal Of Agriculture And Horticulture Innovations (ISSN: 2771-2559)
A field trial was conducted in September 2024 in the
Kibray district of Tashkent region, on the field of
"Boburkhodja, Nodirkhodja Baraka" LLC, to test the
effectiveness of the insecticide PILARURON 50% SC
against Aphis gossypii, one of the main pests of tomato.
The insecticide was applied at a rate of 0,8
–
1,2 liters
per hectare. The timing of pest occurrence and
population counts were determined using standard
methods described by Bondarenko N.V., (1978);
Polyakov et al., (1984) and Osmolovsky G.E., (1980)
[2;12;13].
The trial was conducted during the flowering stage of
the tomato plants. The experiment included treatment,
reference, and control variants, each replicated three
times. Pest counts were recorded before treatment
and on the 3rd, 7th, 14th, and 21st days post-
treatment. The effectiveness of the insecticide was
evaluated by comparing it to the control variant. Field
trials were conducted following the methodological
guidelines of Khodjaev Sh.T., (2023) [7], and biological
efficacy was calculated using the methodology and
formula of Po’ntener W., (1981)
[14].
RESULTS
Experimental trials were conducted in September of
this year to test the effectiveness of the chemical
preparation PILARURON 50% SC (active ingredient:
Diafenthiuron 500 litr per hectare) against aphids on
tomatoes, at application rates of 0,8-1,2 liters per
hectare.
For
comparison,
Raudo
50%
SC
(Diafenthiuron) at a rate of 1,0 liter per hectare was
used as a reference standard.
The trial results for PILARURON 50% SC at application
rates of 0,8
–
1,2 litr per hectareare presented in table-
1. According to the data, prior to applying PILARURON
at 0.8 litr per hectare, the average number of aphids on
10 tomato leaves was 72,5. After application, the aphid
population steadily decreased, reaching 6,3 on day-3,
4,5 on day-7, 8,3 on day-14, and 12,5 on day-21.
The biological efficacy was 93,7% on day-3, 96.5% on
day-7, 92,4% on day-14, and 87,8% on day-21.
When applied at 1,2 litr per hectare, the average
number of aphids on 10 tomato leaves was 67,3 before
treatment. This number decreased to 4.8 on day-3, 3,1
on day-7, 6,5 on day-14, and 10,3 on day-21. The
biological efficacy was 94,8%, 97,4%, 93,6%, and 89,2%
respectively. In the untreated control variant, the
number of aphids increased over time. From an initial
average of 64,6 per 10 leaves, the count rose to 89,5 on
day-3, 114,3 on day-7, 98,4 on day-14, and 91,5 on day-
21.
In the reference treatment using Raudo 50% SC, the
initial aphid count was 81,5 per 10 leaves. After
application, the counts dropped to 7,5 (day-3), 5.9 (day-
7), 11,5 (day-14), and 14,7 (day-21), with corresponding
biological efficacy rates of 93,4%, 95,9%, 90,7%, and
87,3%. The experimental and reference variants both
demonstrated peak biological efficacy on day-7, after
which the insecticidal effect gradually declined.
CONCLUSION
When applied at rates of 0.8-1.2 litr per hectare,
PILARURON 50% SC demonstrated high biological
efficacy (96,5
–
97,4%) on the 7th day against Aphis
gossypii, a harmful pest of greenhouse-grown
tomatoes. The formulation is user-friendly and readily
forms a working solution when mixed with water. No
phytotoxic effects on the plants were observed.
Table-1
Field Efficacy of the Chemical Preparation "PILARURON 50% SC" Against Aphids
on Tomato (Field Trial, Tashkent Region, Qibray District, “Boburkhodja
Nodirkhodja Baraka” LLC, Manual Application, September-6, 2024).
№ Experimenta
l options
Active
ingredien
t
Prepara
tion
consu
mption
rate
Average number of pests per 10
leaves, units
Biological efficacy %,
days
Before
spraying
medicine
Дори сепилгандан
кейинги кунлар
3
7
14
21
3
7
14
21
1.
PILARURO
N 50% SC
Diafenthi
uron 500
g/l.
0,8
72,5
6,3
4,5 8,3 12,5 93,7 96,5
92,
4
87,8
2.
PILARURO
Diafenthi
1,2
67,3
4,8
3,1 6,5 10,3 94,8 97,4 93,
89,2
American Journal Of Agriculture And Horticulture Innovations
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American Journal Of Agriculture And Horticulture Innovations (ISSN: 2771-2559)
N 50% SC
uron 500
g/l.
6
3.
Raudo 50%
SC.
(standard).
Diafenthi
uron 500
g/l.
1,0
81,5
7,5
5,9
11,
5
14,7 93,4 95,9
90,
7
87,3
4.
Control (no
work done).
-
64,6
89,5
11
4,3
98,
4
91,5
-
-
-
-
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