Efficacy and Safety of Seven Selective Herbicides Against Broad-leaved Weeds in Herbaceous Hybrid Mulberry Field
Weed control is a key technology for large-scale cultivation of herbaceous hybrid mulberry.This experiment was conducted before the sprouting of herbaceous hybrid mulberry in spring to compare the effects of seven selective herbicides in controlling broadleaf weeds and their safety on the growth of mulberry trees.The results showed that the efficacy of 240 g/L oxyfluorfen EC sprayed at a 700-fold dilution and 51%flumioxazin water dispersible granules applied at a 4 000-fold dilution achieved 100%and 99.75%control,respectively,on fresh grass of broadleaf weeds.However,the germination of mulberry trees is delayed,the new shoots are short in the early stage of growth,and the leaves are twisted and yellowed,which have a certain impact on the branch length and branch and leaf yield in the later period.Oxyfluorfen and flumioxazin are not recommended for use in herbal hybrid mulberry fields.The control effect of 10%topramezone dispersible oil suspension applied at a 2 000-fold dilution and 30%benazolin suspension applied at a 600-fold dilution on fresh grass of broadleaf weeds was 94.35%and 84.06%,respectively,with no apparent effects observed on mulberry trees.Symptoms of phytotoxicity,branch length and leaf yield of hybrid mulberry were not significantly different from the blank control;the remaining three herbicides were not ideal in controlling broadleaf weeds.Therefore,topramezone and benazolin are suitable herbicide varieties for controlling broadleaf weeds in herbaceous hybrid mulberry fields.
Selective herbicidesHerbaceousHybrid mulberry fieldBroadleaf weedsField control effectSafety
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