Table 4.2 Main pest problems by crop in the Mae Sa watershed area in Thailand, 2010. Shows percentage of observed fields affected by the pest
Pest problem
a
All crops
b
Chayote
Bell peppers
Chinese cabbage
Lettuce (various)
Onions
Chrysan-themum
Roses
Litchi
Thrips
26.6
5.6
89.2
1.4
–
25.0
54.3
70.4
4.6
Beet armyworm
16.9
–
19.1
34.7
22.2
14.3
7.8
7.4
0.8
Powdery mildew
13.8
22.2
8.3
31.9
8.3
39.3
16.4
22.2
1.5
Malformations
12.5
48.9
26.0
5.6
1.4
3.6
19.0
–
3.9
Cabbage webworm
11.1
1.1
10.3
21.5
11.1
3.6
8.6
–
3.9
Rust
10.1
8.9
27.9
4.9
2.8
7.1
3.5
37.0
0.8
Downy mildew
10.0
2.2
9.3
16.0
2.8
–
28.5
3.7
8.5
Cabbage looper
9.4
–
6.9
19.4
2.8
–
7.8
11.1
2.3
Red mite
9.4
1.1
19.1
0.7
–
–
31.0
88.9
–
Leaf miner fly
8.3
–
2.0
6.9
36.1
39.3
21.6
7.4
3.1
Common cutworm
7.4
1.1
2.5
24.3
4.2
–
6.9
3.7
–
Diamondback moth
7.2
–
2.9
14.6
4.2
–
6.0
3.7
–
Shield bug
6.1
1.1
0.5
2.1
2.8
–
–
3.7
39.2
White fly
5.8
5.6
4.9
8.3
2.8
–
0.9
–
–
Fruit borer
4.4
–
0.5
–
–
–
–
–
36.9
Fields observed
–
90
204
144
72
28
116
27
130
a
Refers to 16 pest problems with at least 50 observations each. Based on a self-assessment by farmers of the pests in their fields, identified using pictures
of the pests
b
Refers to 16 crops grown with at least 20 observations. The table only shows a selection of 8 crops
4 Agricultural Pesticide Use in Mountainous Areas of Thailand and Vietnam. . .
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