TEMPERATURE AT TIME OF PLANTING:

  MINIMUM FOR MINIMUM FOR OPTIMUM FOR
  INFECTION REPRODUCTION ACTIVITY
ROOT KNOT      
MELOIDOGYNE SP.      
M. CHITWOODI 45F 45F 68-77F
(COLUMBIA) (6C) (6C) (20-25C)
M. HAPLA 54F 54F 77-86F
(NORTHERN) (12C) (12C) (25-30C)
M. INCOGNITA 65F 50F 76-90F
(SOUTHERN) (18C) (10C) (25-32C)
       
SUGARBEET CYST      
HETERODERA 50F 46F 70-81F
SCHACHTII (10C) (8C) (21-27C)
       
NEEDLE      
LONGIDORUS AFRICANUS DAMAGE TO LETTUCE SEEDLINGS IS MINIMAL AT SOILTEMPERATURES LESS THAN 22C (72F)    

For annual crops, the temperature at the time of planting is also a consideration that can be addressed when interpreting a laboratory report.

This table summarizes information available in the literature on the minimum levels at which nematodes are able to infect a plant.

If planting is to take place at a time of year when temperatures are below this infection minimum, or when soils are cooler, less damage can be expected than when soil temperatures are optimum.

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