Weevil damage to the alfalfa was expressed by 1= least to 9 = most and by plant height May 19. Plots were harvested 4 times and yields (tons per acre dry weight) were calculated as percent of control. All plots were sprayed with Furadan 4F 0.5 lb a.i./A one day after first ...
The aim of this study was to determine the effects of insecticides applied at different times against alfalfa weevil, Hypera postica Gyllenhal (Coleoptera: Curculionidae) on pests, natural enemies, forage yield and protein. Effect of Malathion Applications at Different Times on the Alfalfa Weevil Po...
The alfalfa weevil is a key pest of alfalfa throughout North America, especially in the High Plains region. Overlapping generations of larvae can cause extensive defoliation and reduction in forage yields, and stalk-feeding by adults can impede regrowth after cutting. Most fields in Kansas receive...
Alfalfa weevil, Hypera postica (Gyllenhall) (Coleoptera: Curculionidae), is of Eurasian origin. This destructive pest of alfalfa (lucerne) was accidentally established in North America on three separate occasions. These introductions are commonly identified in the literature as biological strains: wester...
Efficacy of Insecticides Against Strawberry Root Weevil Adults, 1989 A laboratory study was conducted to determine the efficacy of foliar applications of several pyrethroid insecticides and Orthene for control of SRW infesti... Mulgrew,M Susan - 《Insecticide & Acaricide Tests》 被引量: 0发表: 1991...
Alfalfa Weevil | Hypera postica (Gyllenhal)Pea Aphid | Acyrthosiphon pisum Harrislambda-cyhalothrinbeta-cyfluthrindimethoateindoxacarbcarbaryldoi:10.1093/amt/tsac040Owens DavidWilkerson DylanDeidesheimer JosephOxford University Press (OUP)Arthropod Management Tests...
The combination of alsystin (an insect growth regulator (IGR)) and Baythroid (a synthetic pyrethrin) was included in these trials primarily to evaluate efficacy of a pyrethroid at very low rates AI plus an IGR for use in IMP programs for alfalfa weevil where protection of beneficial insects ...
Still, the benefits achieved, especially from reduced need for insecticides in alfalfa production, mark this as one of the great success stories of classical biological control in North America. 展开 关键词: Hypera postica alfalfa weevil Medicago sativa alfalfa biological control classical biological ...
The alfalfa weevil Hypera postica Gyllenhal is a worldwide variable pest that is established in almost all Iranian alfalfa fields and Alfalfa weevil larvae affects quality by attacking the upper canopy. In this research, three insecticides include Deltamethrin, Cypermethrin and Chlorpyrifos were ...
EFFICACY OF INSECTICIDES FOR INSECT CONTROL IN SPRING ALFALFA, 2009 Field plot experiments were conducted in an attempt to find a coordinated control procedure for the alfalfa weevil ( Hypera postica (Gyllenhal)), the pea aphid ( Macrosiphum pisi (Harris)) and the meadow spittlebug ( Philane...