Screening test of pesticides for the prevention and control of rice bakanae disease

doi:10.16178/j.issn.0528-9017.20230750

Abstract

Abstract:

Rice bakanae disease is an important rice disease. Six agents were selected for the screening test, and the soaking test of 200 g·L^-1 fluazole hydroxylamine suspension, the safety of 25% prochloraz aqueous emulsion and 25% cyanostrobin suspension was evaluated by indoor germination rate measurement and other tests. The results showed that the mixed soaking of 25% prochloraz aqueous emulsion and 25% cyanostrobin suspension in barrels for 48 h had an inhibitory effect on the growth of hybrid rice shoots and roots, but had no significant effect on the germination rate. The results of the screening test showed that the control effect of each treatment was unstable for 2 years, but the control effect of 25% cyanostrobin suspension was not good, and the control effect of 0.3% tetramycin aqueous solution was relatively good. 200 g·L^-1 fluazole hydroxylamine suspension 500-8 000 times had a good control effect, which was significantly better than the control agent 25% cyanostrobin suspension. No disease was found in any of the plots after 500 and 1 000 times of 200 g·L^-1 fluazole hydroxylamine suspension treatment. 0.3% tetramycin aqueous solution and 200 g·L^-1 fluazole hydroxylamine suspension can be used for the prevention and control of rice bakanae disease.

Key words: rice bakanae disease, pesticide screening, safety evaluation

CLC Number:

S435.111.44

SHEN Zujin, SHEN Yuejun, YAO Zhangliang, XU Weidong, LU Qiang. Screening test of pesticides for the prevention and control of rice bakanae disease[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(5): 1203-1207.

Figures/Tables 4

References 13

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处理	2020年		2021年
处理	病株数	防治效果/%	病株数	防治效果/%
11%氟环·咯·精甲2 mL包衣	0.67±0.67 c	92.59 a	12.67±3.28 b	46.55±23.41 a
11%氟环·咯·精甲1 000倍	0 c	100.00 a	14.00±8.50 b	59.61±10.98 a
17%杀螟·乙酸素200倍	0 c	100.00 a	19.00±6.66 b	34.17±12.86 a
25%氰烯菌酯2 000倍	4.67±1.33 b	44.44 b	48.33±10.91 a	—
25%氰烯菌酯2 000倍+25%咪鲜胺2 000倍	0 c	100.00 a	25.67±6.01 b	—
25%咪鲜胺2 000倍	0.67±0.67 c	88.89 a	26.00±5.00 b	—
0.3%四霉素400倍	0 c	100.00 a	7.33±1.20 bc	70.32±8.93 a
4.23%甲霜·种菌唑4 000倍	0.33±0.33 c	96.30 a	12.00±1.00 b	46.35±23.36 a
清水对照	8.00±1.00 a	0	32.33±12.72 ab	0

处理	2020年		2021年
处理	病株数	防治效果/%	病株数	防治效果/%
11%氟环·咯·精甲2 mL包衣	0.67±0.67 c	92.59 a	12.67±3.28 b	46.55±23.41 a
11%氟环·咯·精甲1 000倍	0 c	100.00 a	14.00±8.50 b	59.61±10.98 a
17%杀螟·乙酸素200倍	0 c	100.00 a	19.00±6.66 b	34.17±12.86 a
25%氰烯菌酯2 000倍	4.67±1.33 b	44.44 b	48.33±10.91 a	—
25%氰烯菌酯2 000倍+25%咪鲜胺2 000倍	0 c	100.00 a	25.67±6.01 b	—
25%咪鲜胺2 000倍	0.67±0.67 c	88.89 a	26.00±5.00 b	—
0.3%四霉素400倍	0 c	100.00 a	7.33±1.20 bc	70.32±8.93 a
4.23%甲霜·种菌唑4 000倍	0.33±0.33 c	96.30 a	12.00±1.00 b	46.35±23.36 a
清水对照	8.00±1.00 a	0	32.33±12.72 ab	0

处理	病株数	防治效果/%
200 g·L^-1氟唑菌酰羟胺500倍	0 c	100.00 a
200 g·L^-1氟唑菌酰羟胺1 000倍	0 c	100.00 a
200 g·L^-1氟唑菌酰羟胺4 000倍	0.17±0.17 c	98.61±1.39 a
200 g·L^-1氟唑菌酰羟胺8 000倍	0.88±0.28 c	86.46±5.24 a
25%氰烯菌酯2 000倍	4.83±0.63 b	31.91±9.44 b
清水对照	9.17±1.12 a	0 c

处理	病株数	防治效果/%
200 g·L^-1氟唑菌酰羟胺500倍	0 c	100.00 a
200 g·L^-1氟唑菌酰羟胺1 000倍	0 c	100.00 a
200 g·L^-1氟唑菌酰羟胺4 000倍	0.17±0.17 c	98.61±1.39 a
200 g·L^-1氟唑菌酰羟胺8 000倍	0.88±0.28 c	86.46±5.24 a
25%氰烯菌酯2 000倍	4.83±0.63 b	31.91±9.44 b
清水对照	9.17±1.12 a	0 c