Defoliation, vine

Dimethipin. 2,3-Dihydro-5,6-dimethyl-l,4-dithiin-l,l,4,4-tetraoxide [55290-64-7] (dimethipin, oxidimethiin, UBI-N252, Harvard) (25) is used as a cotton defoliant and has been used as an experimental desiccant in potato vines. In addition, it defoliates nursery stock, grapes, dry beans, and natural mbber and is used as a desiccant for seed of canola, flax (Unutn usitatissimum), rice, and sunflower (Helianthus annuus) (10). The product has been available since the mid-1970s and the experimental work was first reported in 1974 (44). 

Diverse causes can result in more or less severe vine defoliation. Maturation is difficult due to insufficient grape alimentation. A late downy mildew attack can cause total leaf loss in certain very sensitive varieties, such as Grenache. Similarly, leaves infected with powdery mildew always lower grape quality. Parasite development leads to significantly reduced crop yields, and very late attacks hinder grape maturation. 

AG) is used for weed control in grapes, nut crops, pome and stone fruits and also as a cotton defoliant [259], It was registered in Australia and approved by U. S. enviromnental protection agency. Benzfendizone (developed by FMC Corporation) is a post-emergence herbicide that provides good control of grass and broadleaf weeds in tree fruits and vines, as a cotton defoliant, and in total vegetation control [256], Flufenpyr-ethyl (developed by Sumitomo Chemical... 

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