Category Archives: Diseases

Cotton turning . . . too soon?

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IMG_4307The call of the week (beyond target spot) has concerned cotton ‘turning’.  In the dictionary of cotton rhetoric, ‘turning’ refers to the shift in canopy color from dark green to shades of yellow and red, or senescence, which usually coincides with the second or third week of football season.  Over the past week, the crop has definitely made a turn towards finishing out the season .  . .  and kickoff for the first game is still a few days away. The general concern is this change has occurred much more rapidly and earlier than we would like.  So are we looking at premature senescence and yield penalties? Continue reading


Red leaves in cotton: Causes and implications

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Tyson Raper, Heather Kelly and Frank Yin
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IMG_1778Observing canopy characteristics during the growing season is a good way to understand the plant’s response to its environment.  Occasionally, portions of the canopy may develop reddish-purple or red tones.  The synthesis of anthocyanin, the pigment which typically causes the reddening, is commonly increased after leaves are exposed to light following multiple abiotic and biotic stresses.  Continue reading