Agriculture: Citrus Pest Management Guidelines

Timings for Key Cultural and Management Practices

Approximate times for citrus-growing practices in California's Central Valley. Actual times vary according to location weather, crop history, and crop cultivar and development stage. Testing foliage and whitewashing trees generally are done once during the indicated period. Practices such as frost protection, irrigation, and pest monitoring are ongoing or are repeated at appropriate intervals.

TIME OF YEAR
CROP DEVELOPMENT PERIOD JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Prebloom                        
Bloom period                          
Petal fall                          
Fruit development                        
Fall                          
CULTURAL and MONITORING PRACTICES
Monitor pests regularly1                        
Harvest                          
Survey weeds2                        
Frost protection                        
Monitor soil moisture, irrigate if it is dry                        
Irrigate regularly based on monitoring trees' varying need for water                        
Manage ants3                          
Fertilize                        
Prune                          
Manage fruit set and size                        
Sample leaves for nutrients                          
Protect fruit from senescence and manage fruit drop                        
Whitewash trunks                          
1 While pests should be monitored throughout the year, they do not need to be monitored as often during the cooler periods (Oct. to Jan.) as during the rest of the year.
2 Survey weeds at least 2 times during the year, with winter and summer being most important.
3 When using sweet liquid ant baits, begin monitoring early (about February along the coast, somewhat later in the Central Valley) before any Homopteran honeydew becomes abundant. Competition from abundant honeydew reduces ants' attraction to sweet baits.
Text Updated: 01/19