Table III.

Plackett-Burman design and response values.

Order	Variable code								Y Sporulation (conidia/l) 1 × 109
	X1	X2	X3	X4	X5	X6	X7	X8
1	1	1	−1	1	1	1	−1	−1	22.370 ± 1.833
2	−1	1	1	−1	1	1	1	−1	2.860 ± 0.282
3	1	−1	1	1	−1	1	1	1	4.267 ± 0.466
4	−1	1	−1	1	1	−1	1	1	0.923 ± 0.117
5	−1	−1	1	−1	1	1	−1	1	9.043 ± 1.283
6	−1	−1	−1	1	−1	1	1	−1	1.487 ± 0.289
7	1	−1	−1	−1	1	−1	1	1	33.453 ± 3.836
8	1	1	−1	−1	−1	1	−1	1	30.840 ± 2.155
9	1	1	1	−1	−1	−1	1	−1	11.113 ± 0.934
10	−1	1	1	1	−1	−1	−1	1	5.773 ± 0.636
11	1	−1	1	1	1	−1	−1	−1	6.950 ± 0.865
12	−1	−1	−1	−1	−1	−1	−1	−1	5.650 ± 1.211
13	0	0	0	0	0	0	0	0	10.628 ± 1.353
14	0	0	0	0	0	0	0	0	13.027 ± 1.477
15	0	0	0	0	0	0	0	0	19.129 ± 1.886