Crops ›› 2023, Vol. 39 ›› Issue (5): 164-169.doi: 10.16035/j.issn.1001-7283.2023.05.024

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Effects of 14% Thiobenzene-Dioxalon on Defoliation Ripening, Yield and Quality of Cotton

Wu Xueqin1,2(), Liu Kaiyu3(), Han Chunhua3, Alimujiang·Kelaimu 1, Cui Yannan1, Li Jiangyu1, Ma Chunmei1,2, Zhong Wenfan1, Zhao Qiang1()   

  1. 1College of Agronomy, Xinjiang Agricultural University/Engineering Research Center of Cotton, Ministry of Education, Urumqi 830052, Xinjiang, China
    2Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang 255000, Henan, China
    3Beijing Guangyuan Yinong Chemical Co., Ltd., Beijing 100083, China
  • Received:2022-04-08 Revised:2023-07-12 Online:2023-10-15 Published:2023-10-16

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Abstract:

In order to compare the effects of different dosages of 14% thiobenzene-dioxalon SC on defoliation, ripening, yield and quality of cotton, this study tested four different doses of 14% thidiazuron-dioxalon SC, whose active ingredient were T1 (42g/ha), T2 (84g/ha), T3 (126g/ha) and T4 (168g/ha), respectively. 50% thidiazuron WP with 225g/ha active ingredient and 80% dioxalon WP with 1200g/ha active ingredient were used as control agents, and water was also used as control. Field experiments were conducted to study the effects of 14% thiobenzene-dioxalon SC on defoliation, ripening, yield and quality of cotton in Hutubi county of northern Xinjiang and Korla of southern Xinjiang. The results showed that T4 had the best defoliation effect, and its defoliation rate was more than 75%; T3 had the best ripening effect, and the boll opening rate was higher than 93%. None of the treatments, except T1, had adverse effects on cotton yield and its components and fiber quality. The study also showed that 14% thiobenzene-dioxalon SC had certain advantages in chemical defoliation in Xinjiang cotton areas. Considering pesticide reduction and production cost, it was recommended that the active ingredient content of 14% thiobenzene-dioxalon SC should be within 84-126g/ha.

Key words: Cotton, Thiobenzene-dioxalon, Defoliation rate, Boll opening rate, Yield

Table 1

Treatment number and dosage of each agent"

处理
Treatment		 药剂名称
Drug name		 有效成分量
Effective component (g/hm2)
T1 14%噻苯·敌草隆SC 42
T2 14%噻苯·敌草隆SC 84
T3 14%噻苯·敌草隆SC 126
T4 14%噻苯·敌草隆SC 168
T5 50%噻苯隆WP 225
T6 80%敌草隆WP 1200
CK 清水对照 －

Fig.1

Temperature change before and after defoliator treatments"

Table 2

Defoliation effects of cotton treated with different medicaments in southern and northern Xinjiang"

试验地点
Experiment site		 处理
Treatment		 脱叶率Defoliation rate (%)
5d 10d 15d 20d
北疆Northern Xinjiang T1 23.75±5.35a 43.57±11.35a 58.44±11.77a 66.45±10.79a
T2 25.98±6.03a 44.52±8.21a 60.79±5.93a 71.64±5.36a
T3 27.70±7.73a 45.43±6.71a 61.97±4.32a 72.00±1.53a
T4 29.44±6.81a 51.30±12.84a 66.60±14.32a 75.14±8.01a
T5 23.19±4.23a 41.52±7.24a 57.45±5.37a 69.65±6.79a
T6 21.61±6.64a 40.08±12.00a 57.71±12.36a 66.39±9.44a
CK 2.71±1.10b 7.28±2.90b 12.45±5.13b 19.49±6.04b
南疆Southern Xinjiang T1 31.61±0.57c 43.76±2.19c 69.77±1.85c 83.96±3.05c
T2 34.54±2.54c 45.83±4.03bc 78.32±4.77b 89.74±2.40b
T3 45.86±5.73b 73.85±7.01a 86.28±4.23a 92.60±2.58ab
T4 53.11±1.59a 81.17±1.97a 90.35±0.71a 95.59±0.51a
T5 29.95±4.79cd 52.37±9.30b 72.83±7.32bc 82.88±2.62c
T6 25.53±3.01d 42.99±4.00c 62.99±6.34d 80.89±4.39c
CK 12.68±3.65e 23.41±3.38d 41.75±1.87e 53.16±2.37d

Table 3

Cotton batting effects treated with different medicaments"

试验地点
Experiment site		 处理
Treatment		 吐絮率Boll opening rate (%)
0d 5d 10d 15d 20d
北疆Northern Xinjiang T1 15.53±0.69a 34.03±7.49a 60.82±6.23a 84.68±5.60a 88.81±3.13a
T2 14.48±2.03a 38.05±4.51a 61.02±4.75a 83.74±7.82a 89.71±3.60a
T3 14.92±1.00a 39.61±9.26a 64.54±11.24a 86.84±5.71a 90.57±5.04a
T4 16.90±4.58a 38.49±7.81a 63.45±10.71a 82.81±14.37a 88.17±8.92a
T5 16.52±5.60a 38.79±5.65a 64.00±12.25a 82.60±16.76a 85.44±14.83a
T6 16.52±6.87a 38.80±13.33a 62.81±24.30a 77.48±18.22a 87.05±8.56a
CK 15.30±3.19a 26.23±3.64b 39.37±6.27b 53.52±10.00b 69.58±1.31b
南疆Southern Xinjiang T1 29.30±0.80a 44.93±3.14cd 59.54±3.74b 75.31±4.43d 85.73±2.45c
T2 28.95±0.59a 52.95±0.59b 68.91±1.91a 79.31±1.66cd 90.40±0.84b
T3 29.40±0.46a 61.09±1.29a 76.07±2.63a 89.58±3.29a 96.65±1.60a
T4 29.51±0.28a 53.91±2.78b 72.88±2.27a 87.33±3.36ab 93.07±1.34ab
T5 29.43±0.43a 48.84±5.84bc 70.20±5.88a 83.30±4.28bc 90.81±3.87b
T6 29.69±0.42a 53.22±7.30b 69.42±8.34a 82.78±4.76bc 91.44±1.46b
CK 29.52±0.40a 40.62±2.49d 51.53±2.40c 64.09±1.10e 75.89±4.02d

Table 4

Yield and its components of different pharmaceutical treatments"

试验地点
Experiment site		 处理
Treatment		 单铃重
Boll weight (g)		 子指
Seed (g)		 衣分
Lint percentage (%)		 单株结铃数
Boll number per plant		 籽棉产量
Seed yield (kg/hm2)
北疆Northern Xinjiang T1 5.97±0.08a 10.27±0.56a 46.91±1.08a 5.71±0.39a 6233.24±659.26a
T2 6.04±0.35a 10.58±0.31a 46.80±1.11a 6.25±0.40a 7201.67±823.90a
T3 6.17±0.28a 10.18±0.53a 47.03±0.81a 5.94±0.41a 6887.73±944.88a
T4 5.83±0.37a 10.38±0.56a 47.48±0.89a 6.05±0.39a 6674.75±101.51a
T5 5.87±0.27a 9.62±0.68a 46.70±0.87a 5.88±0.16a 6268.86±227.49a
T6 6.16±0.13a 10.28±0.78a 46.30±1.47a 6.00±0.65a 7007.83±611.95a
CK 5.93±0.13a 10.59±0.86a 46.09±1.17a 6.31±0.28a 6863.00±87.81a
南疆Southern Xinjiang T1 5.41±0.08a 9.63±0.67a 44.70±0.85a 9.51±0.23a 5561.97±536.78a
T2 5.47±0.26a 10.08±0.65a 44.31±0.06a 9.26±1.12a 5518.05±463.19a
T3 5.40±0.19a 10.13±0.79a 45.18±0.66a 9.84±1.42a 5782.33±802.45a
T4 5.22±0.07a 10.15±0.57a 45.15±0.85a 9.50±0.29a 5260.68±286.68a
T5 5.38±0.12a 9.98±1.07a 44.76±0.49a 9.53±0.68a 5458.34±563.93a
T6 5.50±0.24a 10.18±0.85a 45.18±0.38a 9.29±0.18a 5538.91±474.46a
CK 5.38±0.14a 10.15±0.90a 45.03±0.58a 9.44±0.09a 5436.38±165.20a

Table 5

Quality of cotton fiber treated with different medicaments"

试验地点
Experiment site		 处理
Treatment		 纤维长度
Fiber length
(mm)		 整齐度指数
Uniformity
index (%)		 断裂比强度
Specific breaking
strength (cN/tex)		 伸长率
Elongation
rate (%)		 马克隆值
Micronaire
value
北疆Northern Xinjiang T1 30.03±0.68ab 85.30±0.70ab 27.23±1.29b 10.85±0.66ab 4.73±0.53b
T2 29.95±0.39ab 84.88±0.59b 29.43±0.52a 9.75±0.47b 5.08±0.05b
T3 30.68±0.62a 84.78±0.57b 28.15±0.93ab 11.25±0.75a 5.05±0.06b
T4 30.45±0.61a 85.45±0.87ab 28.03±0.41ab 11.50±0.90a 4.95±0.25b
T5 30.88±0.17a 86.23±0.35a 29.05±0.78a 11.78±1.86a 4.75±0.29b
T6 30.83±1.05a 85.70±1.25ab 29.30±0.99a 10.35±0.26ab 5.03±0.10b
CK 29.43±0.35b 84.93±0.29b 28.78±1.00a 10.58±0.50ab 5.50±0.14a
南疆Southern Xinjiang T1 29.10±0.68a 85.46±0.08a 31.14±0.24a 7.11±0.04a 4.39±0.05a
T2 29.59±0.58a 85.46±0.08a 31.23±0.24a 7.08±0.04a 4.41±0.04a
T3 29.05±0.67a 85.41±0.10a 31.28±0.13a 7.11±0.01a 4.42±0.05a
T4 29.56±0.36a 85.43±0.09a 31.23±0.24a 7.11±0.03a 4.38±0.08a
T5 29.10±0.59a 85.46±0.12a 31.36±0.06a 7.09±0.05a 4.37±0.03a
T6 29.12±0.53a 85.44±0.13a 31.09±0.20a 7.09±0.03a 4.42±0.03a
CK 29.49±0.47a 85.48±0.12a 31.05±0.11a 7.08±0.03a 4.35±0.05a
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