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Show Lygus Bug Control By Spray Lygus bug injury to the alfalfa crop left for seed, is anticipated in many cases this season by Dr. George F. Knowlton, USAC extension exten-sion entomologist. Many alfalfa seed growers have tried other than the standard stren gth DDT dust or spray, applied to alfalfa in the bud stage. This DDT stand treatment is aimed at controlling con-trolling the lygus bug nymphs and adults for at least three weeks. Usually it is effective for a longer period of time. Wherever chlordane, lindane, toxaphene or parathion were applied ap-plied for weevil control on seed alf alfa acreages, instead of DDT, growers gro-wers must make a careful che,ck of the fields at frequent intervals. Seed growers who used other than DDT will need to spray or dust with toxaphene during evening or early morning wherever lygus bugs justify control to prevent lygus bug bud-blast and extensive blossom blos-som stripping due to lygus nym-phal nym-phal and adult bug feeding injury. Parathion should never be applied ap-plied to aMalfa or clovers while they are in bloom, or extensive poisoning of essential alfalfa blossom blos-som bee pollinators will result. One of the most important limiting lim-iting factors in alfalfa seed production pro-duction in all parts of Utah, in the opinion of College apicultur-ists apicultur-ists and entomologists, is the shortage shor-tage of honey bees, bumble bees, leafcutter bees and alkali bees in alfalfa seed districts. These are essential es-sential to the production of maximum max-imum seed crops, entomologist Knowlton pointed out. |