Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 12
Page 13
Page 14
Page 15
Page 16
Page 17
Page 18
Page 19
Page 20
Page 21
Page 22
Page 23
Page 24
Page 25
Page 26
Page 27
Page 28
Page 29
Page 30
Page 31
Page 32
F E B R U A R Y 2 0 1 614 POTATO GROWER As our winter weather makes us think of warmer days many start thinking and talking of better things such as planting potatoes. In 2013 I wrote about herbicide carry- over in potato however there have been a number of changes in herbi- cides and the length of potato rota- tion restrictions. Because of these changes I will revisit this informa- tion. Potato plants can be sensitive to many types of soil-residual herbi- cides. This is especially a concern when renting land with the inten- tion for potato production. It is important to know what herbicides have been used previously because herbicide residuals may be harmful to potato plants up to 48 months after they are applied. It is a good practice to review previous herbi- cide applications to a field where plans have been made to plant pota- toes. Carryover of herbicides can affect emergence rate and growth causing a reduction in potato yield andor quality. The carryover potential of herbicides varies because of their chemical structure. Soil characteris- tics and environmental conditions will also affect the potential for car- ryover. Understanding the potential effects of herbicides residues in the soil will ensure that the potato crop can produce high yield and quality. Restrictions for planting potatoes in North Dakota can be found in the North Dakota Weed Control Guide www.ag.ndsu.eduweeds Table 1. This information is from current registration labels as available. For states outside of North Dakota check the herbicide labels for specif- ic instructions on potato rotation. If problems arise and you need help diagnosing an issue the NDSU UMN Potato Diagnostics page at z.umn.edud is a perfect place to go for help. Andys Advice 2016 Update On Herbicide Carryover In Potatoes By Andy Robinson Extension Potato Agronomist NDSU and Rich Zollinger Extension Weed Scientist NDSU