Table 3 Progression of Alternaria leaf spot on soybean in relation to weather parameters in different dates of sowing under epiphytotic conditions during Kharif 2018.

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 2018	32.2	23.2	87.1	74.4	130.2	0.00	0.00	0.00	0.00
2	29	16-22July 2018	30.1	23.0	90.9	81.0	98.2	31.74	0.00	0.00	0.00
3	30	23–29 July 2018	28.2	22.9	82.1	74.6	2.4	65.31	33.85	0.00	0.00
4	31	30-5Aug. 2018	30.5	22.7	75.6	58.6	0.0	83.13	73.15	29.89	0.00
5	32	6–12 Aug. 2018	29.6	22.4	85.1	73.9	27.2	100.98	84.67	65.42	28.50
6	33	13–19 Aug. 2018	30.8	22.9	82.7	72.1	67.6	114.66	99.37	82.22	71.96
7	34	20–26 Aug. 2018	28.6	22.5	82.6	78.3	33.6	128.28	114.91	99.89	86.77
8	35	27–2 Sept. 2018	29.1	22.0	83.7	74.1	17.4	159.43	127.44	112.35	96.01
9	36	3–9 Sept. 2018	28.3	21.0	81.7	69.1	11.0	216.55	140.04	123.38	102.94
10	37	10–16 Sept. 2018	27.9	21.0	83.7	64.7	8.8	258.16	157.33	134.23	115.71
11	38	17–23 Sept. 2018	32.3	19.6	81.3	52.4	28.8	286.09	179.62	155.96	138.32
12	39	24–30 Sept. 2018	31.3	18.1	80.4	40.4	25.8	313.74	212.07	187.50	171.50
13	40	1–7 Oct. 2018	34.4	17.2	74.0	41.9	0.0	327.46	255.12	221.34	201.39
14	41	8–14 Oct. 2018	34.2	17.2	66.4	40.1	0.0	342.86	289.94	254.28	223.20
15	42	15–21 Oct. 2018	34.0	15.1	64.9	23.0	0.0	363.13	308.60	277.97	244.34
16	43	22–28 Oct. 2018	33.5	13.7	64.1	19.6	0.0	389.45	334.25	299.46	266.18

*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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