Organizing co mmittee

References: 
 
1.
I. Bаkieva, K. Mamatov. Tuta absoluta // O’simliklar himoyasi va karantini. 2016, 
№3, P.36-37. 
2.
Abbot W.S. A method of computing the effectiveness of an insecticide // J. Econ. 
Entomol. -Vol. 18. – N 3. – P. 265-267. 
 
 

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Poster presentation 
292 
GROWTH-STIMULATING EFFECT OF THE AMOUNT OF NEUTRAL 
SUBSTANCES COTTON LEAVES LINE T-104 
 
N.O. Panaeva
1
, P.A. Nurmakhmadova
1
, N.M. Mamatkulova
1
,
N.K. Khidyrova
1
, S.S. Sidikov
2
 
1) 
S.Yu. Yunusov Institute of the Chemistry of Plant Substances Academy of sciences of 
the Republic of Uzbekistan 
2) Mirzo Ulugbek National University, 
e-mail: [e-mail] 
Cotton belongs to the genus Gossypium of the Malvaceae family. All its organs are 
valuable raw materials for industry, and about 1200 products can be obtained on their 
basis. Earlier, we studied some secondary metabolites of leaves of dwarf and tall cotton 
lines and found tocopherols, phytosterols, and polyisoprenoids, on the basis of which 
the uchkun biostimulator was created [1]. Continuing research in this direction, we 
conducted research on the study of cotton leaves of the breeding line T-104, created by 
employees of the Institute of Breeding, Seed Production and Agricultural Technology of 
Cotton Growing [2]. The breeding line T-104 belongs to the species 
G. hirsutum
L. 
early maturing, highly productive, resistant to pests and diseases. Extraction of dried 
cotton leaves T-104 yielded a total of neutral substances (TNS) with a yield of 6.7%. 
The primary screening of which gave a positive growth-stimulating effect [3]. 
The aim of the study is to study the effect of TNS on the development and 
productivity of cotton variety Kelajak on improved soil structure. 
Small plot tests were carried out in typical sierozem soils on the territory of the 
Botanical Garden of the National University of the Republic of Uzbekistan (in 200 m
2
of land). As a result of the agrochemical treatments, the content of nitrogen, phosphorus 
and potassium in the soil was 0.080%, 0.20% and 1.51%, respectively. Treatment with 
TNS was carried out by the method of pre-sowing seed treatment and spraying of plants 
in the vegetation phases at a concentration of 0.005%. 
The results obtained showed that the treatment of soil with microfertilizers and 
cotton seeds with an aqueous emulsion of TNS contributed to the emergence of friendly 
seedlings on the 6th day, and true leaves on the 14th day, respectively, i.e. 3 days earlier 
than control. Spraying with an aqueous emulsion of TNS was carried out twice in the 
phase of the beginning of budding and after 10 days. A positive effect was observed in 
all phases of cotton development - earlier flowering, accumulation of fruit elements and 
ripening, which contributed to an increase in yield by 50% compared to the control. 
Thus, the influence of the amount of neutral substances of cotton leaves of the T-104 line 
on the yield of cotton under conditions of improved soil structure was studied. As a result of 
the experiments, the increase in the yield of raw cotton was 10.5 centner per hectare.