Table 6 Progression of Alternaria leaf spot on soybean in relation to weather parameters in different dates of sowing under epiphytotic conditions during Kharif, 2019.

S. No	Standard week	Meteorological weeks	Temperature (°C)		Relative humidity (%)		Rainfall (mm)	AUDPC*
			Max	Min	Max	Min		Inoculated on
			Max	Min	Max	Min		8th July	15th July	22th July	29th July
1	28	9–15 July 2019	31.8	24.0	71.6	57.8	0.0	0.00	0.00	0.00	0.00
2	29	16–22 July 2019	33.6	23.7	76.9	55.0	34.6	32.94	0.00	0.00	0.00
3	30	23–29 July 2019	31.5	24.1	81.0	67.6	12.6	73.33	30.66	0.00	0.00
4	31	30-5Aug. 2019	30.6	22.9	88.4	78.6	15.0	91.74	66.64	26.39	0.00
5	32	6–12 Aug. 2019	28.7	21.9	87.1	78.9	182.2	107.00	79.73	59.64	28.53
6	33	13–19 Aug. 2019	27.6	21.6	90.3	80.0	153.0	119.77	94.40	73.15	63.53
7	34	20–26 Aug. 2019	31.7	21.3	82.9	63.7	69.6	135.80	109.45	86.10	75.25
8	35	27–2 Sept. 2019	30.0	21.7	94.3	78.4	141.0	166.60	123.24	101.50	86.45
9	36	3–9 Sept. 2019	29.3	22.8	92.7	84.4	85.5	227.96	136.19	116.73	97.34
10	37	10–16 Sept. 2019	30.6	22.4	87.9	77.3	36.1	269.54	152.08	129.68	108.89
11	38	17–23 Sept. 2019	31.8	21.0	87.7	62.4	42.2	292.15	181.37	151.06	130.41
12	39	24–30 Sept. 2019	29.4	21.8	92.4	73.3	14.2	320.04	214.87	181.20	161.49
13	40	1–7 Oct. 2019	30.2	18.6	89.1	68.0	66.4	334.50	267.37	211.51	188.62
14	41	8–14 Oct. 2019	31.5	16.3	85.6	62.1	18.4	349.72	315.49	239.82	210.25
15	42	15–21 Oct. 2019	32.0	16.1	80.1	46.3	0.0	370.27	333.45	275.45	234.89
16	43	22–28 Oct. 2019	29.1	13.2	80.6	38.1	0.0	394.42	354.06	312.03	259.18

*Mean of three replications, Inoculation started 21 days after sowing of each date. *Observation started 7th days after inoculation and at weekly intervals, 1st sown-18th June, 2nd–25th June, 3rd–02th July, 4th–09th July 2018.

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