Table 1.
Temperature and humidity readings for 1991 and 1992 lilac powdery mildew spray trials.
Date
Temperature, °C
Relative humidity, %
1991
12 July
32
34
25 July
26
65
16 Aug
29
51
29 Aug
29
45
9 Sept
28
54
1992
8 July
30
46
3 Aug
29
52