Question

Which is the largest pre - emergence herbicide control weeds in citrus and pineapple orchards?

Answer 1

The Orchard, Vineyard, and Small Fruit Weed Problems

I

Simazine has been widely used in raspberry, boysenberry, and blueberry production (Welker and Brogdon, 1968). When used alone, broadleaf weed control has been excellent, but annual grasses and perennial weeds were not controlled in blueberry (Hertz and Wildung, 1978). Spring-planted raspberry crops do not tolerate weed competition well (Lawson and Wiseman, 1976). Simazine and diuron have been used extensively in many states in new or established cane-planted raspberry.Micropropagated raspberry is less tolerant to simazine, probably because of the shallow roots picking up more herbicide than the deeper rooting cuttings (Neal et al., 1990). When simazine was used in a New York study, weed control was excellent. However, with rainfall plus supplemental irrigation, there was less plant establishment and growth in herbicide-treated vines compared to mulched plants (Trinka and Pritts, 1992). It was determined that mulching provided a more uniform microclimate (moisture) than the plots with no weeds or cover.Producers attempt to eliminate perennial weeds in small fruits with soil fumigation and plastic mulches. In caneberry, low rates of simazine can be used in heavier soils. Caneberry has good crop tolerance to other preemergence herbicides such as oryzalin, napropamide, and pendimethalin, though their weed spectrum may be reduced compared to simazine.this is just guidline if it not helpful then i am srry