45 / 84
43
May 2018
TABLE 1: POTENTIAL YIELD LOSS (%) ON WHEAT THAT COULD BE EXPERIENCED WHEN PERCENTAGE LEAF AREA LOST ON THE UPPER TWO
LEAVES OF WHEAT ARE CORRELATED WITH THE PERCENTAGE INFESTED TILLERS PER FIELD.
% INFESTED
TILLERS/FIELD
PERCENTAGE LEAF AREA LOST
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
10
0,34
0,68
1,02
1,36
1,70
2,03
2,37
2,71
3,05
3,39
20
0,68
1,36
2,03
2,71
3,39
4,07
4,75
5,42
6,10
6,78
30
1,02
2,03
3,05
4,07
5,09
6,10
7,12
8,14
9,15
10,17
40
1,36
2,71
4,07
5,42
6,78
8,14
9,49
10,85
12,20
13,56
50
1,70
3,39
5,09
6,78
8,48
10,17
11,87
13,56
15,26
16,95
60
2,03
4,07
6,10
8,14
10,17
12,20
14,24
16,27
18,31
20,34
70
2,37
4,75
7,12
9,49
11,87
14,24
16,61
18,98
21,36
23,73
80
2,71
5,42
8,14
10,85
13,56
16,27
18,98
21,70
24,41
27,12
90
3,05
6,10
9,15
12,20
15,26
18,31
21,36
24,41
27,46
30,51
100
3,39
6,78
10,17
13,56
16,95
20,34
23,73
27,12
30,51
33,90
3
1
2
1: An adult leaf miner fly.
2: A leaf miner larva inside a leaf.
3: Lower infested leaves dying off.