Crops ›› 2021, Vol. 37 ›› Issue (6): 224-229.doi: 10.16035/j.issn.1001-7283.2021.06.036

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Control Effects of Different Seed Treatments on the Rice Leaf Folder under Machine-Planting Condition

Yu Julong1(), Zhang Guo1, Zhao Laicheng1, Yao Kebing1, Luo Guanghua2, Fang Jichao2, Zhang Jianhua1, Jiao Yang3, Shu Zhaolin1()   

  1. 1Zhenjiang Institute of Agricultural Sciences in Hilly Area of Jiangsu Province, Zhenjiang 212400, Jiangsu, China
    2Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
    3Zhenjiang National Agricultural Science Park, Jurong 212403, Jiangsu, China
  • Received:2021-01-11 Revised:2021-02-25 Online:2021-12-15 Published:2021-12-16
  • Contact: Shu Zhaolin E-mail:yujulong@126.com;shuzl2005@163.com

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Abstract:

In order to screen suitable seed treatments for long-term control of the rice leaf folder under machine-planting condition in hilly rice area in Jiangsu province, under machine-planting condition, the leaf preservation effect and insecticidal effect of three chlorantraniliprole (CAP) seed treatments (seed soaking with CAP, dressed with CAP after soaking in water and dressed with CAP directly) were compared. Combined with the moth-driving data, the occurrence of the rice leaf folder was analyzed. The results showed that three seed treatment methods had certain control effects on the rice leaf folder. Under the same dosage conditions, the leaf protection effect on rice and the insecticidal effect to rice leaf folder were dry mixing treatment ≥ wet mixing treatment > seed soaking treatment. When the third generation rice leaf folder was mild to moderate occurrence and the fourth was moderately severe occurrence in Jiangsu province, we used effective dosage of CAP 2.0g/kg under soaking treatment, or 1.0g/kg seeds under dry and wet mixing treatments could achieve more than 90% leaf protection and insecticidal effects, which could last more than 111 days. Combining pesticide utilization and cost factors, seed soaked with water after treated with CAP or seed treated with CAP directly can be used to prevent the early occurrence of lighter and moderately heavy occurrence of rice leaf folder in hilly areas of Jiangsu, which can effectively reduce the white leaf rate and the number of insects in the field, and reduce the frequency of control of the rice leaf folder.

Key words: Seed treatment, Rice leaf folder, The amount of occurrence, Chlorantraniliprole, Control effect

Fig.1

Daily population dynamics of rice leaf folder in control fields from July to September in 2018"

Table 1

The leaf protection effects of different seed treatments on rice after 87 days %"

CAP有效用量
Effective
dosage of
CAP (g/kg)		 浸种
Seeds soaked with CAP		 湿拌
Seed dressing with CAP after
soaking in water		 干拌
Dry seed dressing with CAP
白叶率
Rate of white leaf		 保叶效果
Leaf protection effect		 白叶率
Rate of white leaf		 保叶效果
Leaf protection effect		 白叶率
Rate of white leaf		 保叶效果
Leaf protection effect
1.0 1.49±0.33 51.07±10.99bB 0.10±0.02 95.50±1.12aA 0.10±0.02 93.63±1.45aA
1.5 0.68±0.12 77.71±3.87bA 0.07±0.00 96.68±0.12aA 0.04±0.02 97.49±1.25aA
2.0 0.36±0.07 88.23±2.44aA 0.13±0.08 93.76±3.52aA 0.14±0.03 90.83±1.92aA
2.5 0.23±0.09 92.34±2.90aA 0.07±0.04 96.76±1.92aA 0.12±0.05 92.58±2.88aA
0.0（CK） 3.04±0.22 – 2.13±0.57 – 1.58±0.17 –

Table 2

The insecticidal effects of different seed treatments on rice leaf folder after 87 days"

CAP有效用量
Effective
dosage of
CAP (g/kg)		 浸种
Seeds soaked with CAP		 湿拌
Seed dressing with CAP
after soaking in water		 干拌
Dry seed dressing with CAP
百穴活虫数
Number of insects per
hundred holes of rice		 杀虫效果
Insecticidal
effect (%)		 百穴活虫数
Number of insects per
hundred holes of rice		 杀虫效果
Insecticidal
effect (%)		 百穴活虫数
Number of insects per
hundred holes of rice		 杀虫效果
Insecticidal
effect (%)
1.0 30.00±5.00 21.74±13.04bB 3.33±1.67 92.59±3.70aA 3.33±1.67 86.67±6.67aB
1.5 8.33±3.33 78.26±8.70bA 1.67±1.67 96.30±3.70abA 0 100.00aA
2.0 1.67±1.67 95.65±4.35aA 1.67±1.67 96.20±3.70aA 0 100.00aA
2.5 0 100.00aA 0 100.00aA 0 100.00aA
0.0（CK） 38.33±7.26 – 45.00±13.23 – 25.00±5.77 –

Table 3

The leaf protection effects of different seed treatments on rice after 111 days %"

CAP有效用量
Effective
dosage of
CAP (g/kg)		 浸种
Seeds soaked with CAP		 湿拌
Seed dressing with CAP
after soaking in water		 干拌
Dry seed dressing with CAP
白叶率
Rate of white leaf		 保叶效果
Leaf protection effect		 白叶率
Rate of white leaf		 保叶效果
Leaf protection effect		 白叶率
Rate of white leaf		 保叶效果
Leaf protection effect
1.0 1.59±0.34 52.40±10.14bB 0.16±0.01 93.14±0.51aA 0.12±0.09 94.31±4.08aA
1.5 0.41±0.11 87.78±3.31aA 0.12±0.06 95.11±2.67aA 0.10±0.02 95.14±0.80aA
2.0 0.22±0.09 93.36±2.68aA 0.07±0.04 97.28±1.56aA 0.06±0.04 97.09±0.18aA
2.5 0.18±0.07 94.49±2.24aA 0.07±0.04 97.12±1.71aA 0.02±0.02 98.85±1.15aA
0.0（CK） 3.34±0.15 – 2.40±0.22 – 2.10±0.38 –

Table 4

The insecticidal effects of different seed treatments on rice leaf folder after 111 days"

CAP有效用量
Effective
dosage of
CAP (g/kg)		 浸种
Seeds soaked with CAP		 湿拌
Seed dressing with CAP
after soaking in water		 干拌
Dry seed dressing with CAP
百穴活虫数
Number of insects per
hundred holes of rice		 杀虫效果
Insecticidal
effect (%)		 百穴活虫数
Number of insects per
hundred holes of rice		 杀虫效果
Insecticidal
effect (%)		 百穴活虫数
Number of insects per
hundred holes of rice		 杀虫效果
Insecticidal
effect (%)
1.0 35.00±8.66 32.26±16.76bB 5.00±2.89 91.43±4.95aA 3.33±1.67 94.44±2.78aA
1.5 10.00±7.64 80.65±14.78aA 1.67±1.67 91.14±2.86aA 1.67±1.67 97.22±2.78aA
2.0 1.67±1.67 96.77±3.23aA 1.67±1.67 91.14±2.86aA 0 100.00aA
2.5 1.67±1.67 96.77±3.23aA 0 100.00aA 0 100.00aA
0.0（CK） 51.67±4.41 – 58.33±10.14 – 60.00±17.56 –
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