农业植物病害IPM（英文）- (10).ppt

Case study: Integrated management of Alternaria blight in carrots
Introduction
Efficacy of sole control measures
Integrated of control measures
Concluding remarks
Alternaria dauci in carrots
Carrot field infected with Alternaria dauci
bine
Chemical management of A. dauci
Sprinkler irrigation
1
2
3
4
5
6
7
8
9
Air spraying
Ground spraying
Time (days)
Fungicide treated plot
Untreated control plot
For management of A. dauci
up to 4 sprays are applied each week and up to 40 sprays are applied in a growing season !!!
Objective of the research
To develop an integrated management strategy that will:
1. Reduce the number of sprays applied in a growing season;
2. Prevent disease development and yield losses
Management of A. dauci
Chemical fungicides (protectant, systemic)
Cultural measures (anization of planting, sanitation, irrigation type)
ic (cultivar resistance)
Sole application of measures
Chemical and drip irrigation
Cultivar resistance and chemical control
Integration of measures
Temporal and spatial dissemination of spores
0
4
8
12
16
20
24
0
100
200
300
400
Hour of the day
No. of spores trapped (m3 air/h)
west
east