几种杀菌剂对荞麦茎溃疡病菌的生物活性和田间防治效果

郭婷, 刘雨薇, 吴进蓉, 班瑞娟, 岳文冉, 李哲, 王莉花, 张笑宇

Biological Activity and Field Control Effects of Several Fungicides against Buckwheat Stem Canker by Rhizoctonia spp.

Guo Ting, Liu Yuwei, Wu Jinrong, Ban Ruijuan, Yue Wenran, Li Zhe, Wang Lihua, Zhang Xiaoyu

表1 14种杀菌剂对荞麦茎溃疡病菌生物活性的影响

Table 1 Effects of 14 fungicides on bioactivity of Rhizoctonia spp. of buckwheat

药剂 Fungicide	制剂浓度 Preparation concentration (μg/mL)	平均抑制率 Average inhibition rate (%)	相关系数 Coefficient of correlation	毒力回归方程 Regression equation of virulence	EC₅₀ (95% CI) (μg/L)
10%苯醚甲环唑WG Difenoconazole 10% WG	10 000	51.2	0.6959	y=0.9603x+1.3194	7.10 (0.72~0.76)
10%苯醚甲环唑WG Difenoconazole 10% WG	3333	41.3
	2000	40.3
	1429	29.0
	1111	13.8
40%氟硅唑EC Flusilazole 40% EC	500	89.7	0.9764	y=2.6358x-0.8380	1.56 (0.43~0.44)
40%氟硅唑EC Flusilazole 40% EC	333	74.5
	250	70.2
	200	62.7
	150	47.7
40%福美·拌种灵WP Thiram·Seedvax 40% WP	1000	77.9	0.9840	y=1.4643x+0.3953	2.78 (0.63~0.64)
40%福美·拌种灵WP Thiram·Seedvax 40% WP	500	67.4
	333	53.5
	250	48.5
	200	40.0
25 g/L咯菌腈FS Fludioxonil 25 g/L FS	222	83.8	0.9351	y=9.4308x-16.0070	1.69 (0.40~0.45)
25 g/L咯菌腈FS Fludioxonil 25 g/L FS	200	70.9
	182	60.9
	167	56.8
	154	31.2
70%恶霉灵WP Hymexazol 70% WP	5000	17.7	0.1412	y=0.3502x+2.6265	773.47 (0.84~0.91)
70%恶霉灵WP Hymexazol 70% WP	2500	5.9
	1667	15.6
	1250	9.0
	1000	10.1
80%代森锰锌WP Mancozeb 80% WP	10 000	42.7	0.6751	y=0.3216x+3.5766	27.31 (0.70~0.76)
80%代森锰锌WP Mancozeb 80% WP	3333	40.1
	2000	40.6
	1429	31.6
	1111	31.0
50%异菌脲SC Iprodione 50% SC	2000	62.4	0.9658	y=3.8459x-7.4598	1.72 (0.68~0.75)
50%异菌脲SC Iprodione 50% SC	1429	34.7
	1111	20.0
	909	17.9
	769	8.5
15%三唑酮WP Triadimefon 15% WP	10 000	80.8	0.9013	y=0.8276x+2.5887	0.88 (0.62~0.65)
15%三唑酮WP Triadimefon 15% WP	3333	69.2
	2000	68.8
	1429	55.8
	1111	51.0
50%氟啶胺SC Fluazinam 50% SC	1000	62.0	0.9835	y=1.6605x+0.3348	0.65 (0.55~0.56)
50%氟啶胺SC Fluazinam 50% SC	500	41.4
	333	35.2
	250	24.7
	200	18.5
50%啶酰菌胺WG Boscalid 50% WG	1667	51.8	0.9925	y=3.1967x-5.2863	1.64 (0.68~0.72)
50%啶酰菌胺WG Boscalid 50% WG	1250	32.8
	1000	24.7
	833	17.5
	714	12.0
250 g/L嘧菌酯EC Azoxystrobin 250 g/L EC	1000	62.7	0.8146	y=0.3932x+3.8853	0.58 (0.47~0.54)
250 g/L嘧菌酯EC Azoxystrobin 250 g/L EC	333	47.4
	200	44.9
	143	40.2
	111	38.6
250 g/L吡唑·醚菌酯EC Pyraclostrobin 250 g/L EC	5000	79.0	0.9839	y=1.8513x-1.0456	1.83 (0.65~0.66)
250 g/L吡唑·醚菌酯EC Pyraclostrobin 250 g/L EC	2500	58.0
	1667	48.2
	1250	41.2
	1000	28.4
42.4%唑醚·氟酰胺SC Flutolanil 42.4% SC	100	71.4	0.9011	y=1.5848x+2.5295	0.04 (0.29~0.34)
42.4%唑醚·氟酰胺SC Flutolanil 42.4% SC	50	66.1
	33	52.4
	25	36.8
	20	30.8
70%甲基硫菌灵WP Thiophanate-Methyl 70% WP	1000	69.5	0.8986	y=1.1926x+2.0501	0.29 (0.47~0.51)
70%甲基硫菌灵WP Thiophanate-Methyl 70% WP	333	58.5
	200	47.7
	143	33.8
	111	24.6