|
Year
|
Number of varieties
|
2nd generation (> 10 larvae)a
|
3rd generation (> 13 larvae)b
|
4th generation (> 13 larvae)c
|
Ratiosd per generation/%
|
|---|
|
2nd
|
3rd
|
4th
|
|---|
|
2008
|
35
|
0
|
1
|
2
|
0.0
|
2.9
|
5.7
|
|
2009
|
29
|
5
|
3
|
2
|
17.2
|
10.3
|
6.9
|
|
2010
|
22
|
0
|
1
|
0
|
0.0
|
4.5
|
0.0
|
|
2011
|
22
|
9
|
0
|
0
|
40.9
|
0.0
|
0.0
|
|
2012
|
21
|
1
|
0
|
0
|
4.8
|
0.0
|
0.0
|
|
2013
|
21
|
1
|
0
|
0
|
4.8
|
0.0
|
0.0
|
|
2014
|
23
|
2
|
3
|
1
|
8.7
|
13.0
|
4.3
|
|
2015
|
24
|
2
|
0
|
0
|
8.3
|
0.0
|
0.0
|
- a2nd (>10 larvae), the number of varieties that exceeded the 10-larvae per 100 cotton plants action threshold at the second generation of cotton bollworms
- b3rd (>13 larvae), the number of varieties that exceeded the 13-larvae per 100 cotton plants action threshold at the third generation of cotton bollworms
- c4th (> 13 larvae), the number of varieties that exceeded the 13-larvae per 100 cotton plants action threshold at the fourth generation of cotton bollworms
-
d
\( \mathrm{Ratio}\left(\%\right)=\frac{\mathbf{2nd}\kern0.5em \left(>10\ larvae\right),\mathbf{3}\mathbf{rd}\ \left(>13\ larvae\right),\mathbf{or}\ \mathbf{4}\mathbf{th}\ \left(>13\ larvae\right)\ \mathbf{generation}}{\mathbf{Number}\ \mathbf{of}\ \mathbf{varieties}}\times 100 \)
