| NUMBER OF HEADS HARVESTED (1.9 LBS) | % OF HEADS NOT HARVESTED | WEIGHT OF ROOT SYSTEM (GRAMS) | LARVAE/ 50 ML SOIL | |
| CHECK | 662 | 71 | 26 | 1356 |
| 1,3-D, (20 GPA) | 6,834 | 11 | 33.8 | 366 |
| 1,3-D, (30 GPA) | 7,484 | 8 | 37.2 | 615,\ |
The management of sugarbeet cyst nematode provides an example of how preventative and cultural management techniques have been combined into a management program.
This nematode is found in many sugarbeet and cole crop growing areas of California.
On sugarbeets, the nematode results in stunting of the beets with resulting yield reductions.
Effects on cole crops are often less dramatic but still economically severe. In this example from a chemical control trial on cabbage, use of 1,3-D resulted in significantly more heads of harvestable (i.e. marketable) size. There was nothing inherently wrong with the heads not harvested in the check plots except that they were smaller than the heads in the treated plots. With an extended growing season (or perhaps more flexibility on the part of consumers), many would likely have reached a harvestable size.
A similar situation exists with sugarbeet cyst nematode on Brussels sprouts in which fields are only harvested a single time.
With broccoli or cauliflower, fields are harvested 2 to 3 times. In these situations, it has been shown that nematode control will decrease the number of times a field must be harvested, thus resulting in an economic benefit.