M A R C H 2 0 1 8 POTATO GROWER 25 test is generic and does not differen- tiate between pathogenic and non- pathogenic microbes, which is important to realize, because higher activity is not necessarily a good thing, if pathogens are present. Fumigation disrupted nitrogen transformations and showed higher ammonium in fumigated plots. The fact that chloropicrin had a greater effect than Vapam may possibly be due to less leaching. Dr. Rosen also noted that scab increased slightly with Vapam in one year at least. Dr. Laura Shannon, UMN, is the new potato breeder at the University of Minnesota. She found that growers would like varieties that can solve last year’s problem. Her topic therefore, was ‘Solving Last Year’s Problem: Dropping Chromosomes For Faster Breeding. Potato breeding takes many years because the potato is tetraploid. Therefore, looking at diploids is expected to reduce the number of years. Other programs are looking at that too. To keep up with the trend and with other programs it seems paramount that this will be one of the approaches at the University of Minnesota. Dr. Shannon’s team would like to obtain as many potato flowers as possible to assist in this effort. The program’s priority will be the fresh market, yellow flesh and red pota- toes. Glyphosate and Dicamba Injury to Chip Potato ‘Atlantic’. Dr. Harlene Hatterman-Valenti, NDSU, stated that North Dakota leads our nation in diverse crop production. This means there is a greater risk for potato fields to be adjacent to dicamba and/or glyphosate-tolerant crops. Because of the greater volatil- ity of dicamba the off-target injury from dicamba poses a greater threat to broadleaf crops than glyphosate. She found that environmental con- ditions, especially those following a drift incidence can greatly influence crop recovery and yield reduction. Dicamba residues in plants may cor- relate with yield, but only under ideal environmental conditions. Residues in daughter tubers were variable and suggest that environ- ment will greatly influence how a plant responds to sub-lethal doses (drift). Predicting Potato Yield Losses Due To Metribuzin Sensitivity was the topic of Mr. Razi Ibrahim (NDSU), who had made improvements on a predictive model. R E T T U C D E E S O T AT TA O P t i l Q m o r ro f fr y t ty i l li a u Q p r d h t e t t u C " 4 8 e l b a l i a v A r o t a n i m i l E e c e i P d e e S e l b u o D . . . p u up d n u o r ro g e h t th s r e t t u c d e s r u o t u o b a k s A s u A * I L P P A D I U Q I L r o f e v i t a t n e s e r p e r r u o y k s A . s m a r g o r p / e t a b e r r o f s e i f i l a u q i l p p a d i u q i l y l n o e h T R O T A AT C I . s l i a t e d l a c i m e h c s d r a w e r / t a h t r o t a c 3 3 8 1 - 2 5 3 - 1 0 7 r u O t u o b A k sk A 7 1 0 2 r o F s e r u t a e F Fe d n A t n e m p i ip u q E w e N Ne R E T S U D L E R R A B t n e m p i u q E y e l l a V h t r o N 7 p E L I P • S R O T A AT N I M I L E T R I D • S R E T A AT E R T D E E S • S R E T T U C D E E S q y 8 7 3 2 8 5 D N , n o t f a r G S 1 8 y w H 9 0 8 1 5 S R E Z I S U C C A • S R E Y E V N O C • S R 0 7 0 - 3 3 8 - 0 0 8