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- [4] DETERMINATION OF ECONOMIC INJURY THRESHOLD FOR APHIDS IN SPRING BARLEY JOURNAL OF APPLIED ENTOMOLOGY-ZEITSCHRIFT FUR ANGEWANDTE ENTOMOLOGIE, 1991, 111 (01): : 99 - 103
- [5] OCCURRENCE, DEVELOPMENT, AND DISTRIBUTION OF CEREAL APHIDS ON EARLY AND LATE CULTIVARS OF WHEAT, BARLEY, AND OATS IN SOUTHWESTERN QUEBEC CANADIAN ENTOMOLOGIST, 1980, 112 (06): : 615 - 620
- [6] EFFECT OF GRANULAR AND FOLIAR INSECTICIDES ON CEREAL APHIDS (HEMIPTERA) AND THEIR NATURAL ENEMIES ON FIELD BARLEY IN SOUTHWESTERN QUEBEC CANADIAN ENTOMOLOGIST, 1980, 112 (12): : 1309 - 1313
- [7] DETERMINATION OF ECONOMIC THRESHOLDS AND ECONOMIC INJURY LEVELS FOR MONOCOTYLEDONOUS AND DICOTYLEDONOUS WEEDS IN WINTER-WHEAT AND WINTER BARLEY .2. ECONOMIC THRESHOLDS AND ECONOMIC INJURY LEVELS AS DEPENDENT ON DIFFERENT CONTROL EXPENSES, PRICES OF PRODUCT AND YIELD LEVEL ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION, 1981, 88 (06): : 321 - 336
- [9] INVESTIGATIONS ON THE ECONOMIC DAMAGE LEVEL OF CEREAL APHIDS ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION, 1982, 89 (1-2): : 1 - 17