ACTION THRESHOLD FOR THE CONTROL OF THE WHITE FLY OF THE GREENHOUSES, Trialeurodes vaporariorum (Westwood) (Homoptera: Aleyrodidae), IN GREEN BEANS
Main Article Content
Several field trials were conducted to determineaction the threshold for the greenhouse whitefly, Trlaleurodes vaporariorum (Westwood), a key pest of snap beans in the Sumapaz Province of Colombia. In two initial trials, chemical control of the whitefly was exerted at different levels of attack defined by means of a visual scale based on the phenology of the insect and damage symptoms. Differential attack levels thus obtained resulted in differential yield responses. The regression of attack levels on yield was: y = 26.7 - 1.43x (r = -0.956**). Economic analysis of the data indicated that the action threshold for whitefly control occurred at the level of attack 3, that is when first instar nymphs appear on the lower third of the plant. In two additional trials, control at level 3 was compared with control at level 5 (honeydew formation) in combination with different fungicidal regimes for disease control. Results confirmed that whitefly control at level 3 could be recommended within the integrated Pest Management scheme proposed for snap beans in the Sumapaz Province.
- ISAURA V. RODRÍGUEZ, CÉSAR CARDONA, Problems related to the incidence of whiteflies as pests of annual crops in the cauca Valley of Colombia , Revista Colombiana de Entomología: Vol. 27 No. 1 (2001)
- CÉSAR CARDONA, FRANCISCO RENDÓN, JAVIER GARCÍA, ARISTÓBULO LÓPEZ-AVILA, JUAN M. BUENO, JOSÉ D. RAMÍREZ, Resistance to insecticides in Bemisia tabaci and Trialeurodes vaporariorum (Homoptera: Aleyrodidae) in Colombia y Ecuador , Revista Colombiana de Entomología: Vol. 27 No. 1 (2001)
- JUAN MIGUEL BUENO, CÉSAR CARDONA, Biology and habits of Thrips palmi (Thysanoptera: Thripidae) as a pest of dry beans and snap beans , Revista Colombiana de Entomología: Vol. 27 No. 1 (2001)
- RANULFO GONZÁLEZ, CÉSAR CARDONA, BIOLOGY OF Cerotoma facialisl COMMON BEANE PEST, Phaseolus vulgaris L. , Revista Colombiana de Entomología: Vol. 5 No. 1-2 (1979)
- CONSTANZA QUINTERO, FRANCISCO RENDÓN, JAVIER GARCÍA, CÉSAR CARDONA, ARISTÓBULO LÓPEZ-AVILA, PILAR HERNÁNDEZ, Species and biotypes of whiteflies (Homoptera: Aleyrodidae) affecting annual crops in Colombia and Ecuador , Revista Colombiana de Entomología: Vol. 27 No. 1 (2001)
- MARÍA LUISA CORTÉS, CESAR CARDONA, FERNANDO TRUJILLO, EFFECTIVENESS OF THREE INSECTICIDES FOR THE CONTROL OF BEAN TOSTON, POSSIBLE Phyllonorycter sp (Lepidoptera: Gracillariidae) * IN NARIÑO , Revista Colombiana de Entomología: Vol. 16 No. 1 (1990)
- GUILLERMO SOTELO, CÉSAR CARDONA, A field methodology to evaluate Brachiaria spp. for resistance to the spittlebug, Aeneolamia varia (F.) (Homoptera: Cercopidae) , Revista Colombiana de Entomología: Vol. 27 No. 1 (2001)
- EDISON VALENCIA, CECILIA PLATA, CARLOS CORREDOR, CÉSAR CARDONA, ENZYMATIC RESISTANCE TO INSECTICIDES IN LARVAE OF Heliothis virescens (Lepidoptera: Noctuidae) , Revista Colombiana de Entomología: Vol. 19 No. 4 (1993)
- CESAR CARDONA, MARIA LUISA CORTÉS, ECONOMIC EVALUATION OF THE TOLERANCE OF BEAN VARIETIES TO LEAFHOPPERS. Empoasca kraemeri ROSS & MOORE (HOMOPTERA CICADELLIDAE) , Revista Colombiana de Entomología: Vol. 17 No. 2 (1991)
- JUAN MIGUEL BUENO, CÉSAR CARDONA, PATRICIA CHACÓN, Phenology, spatial distribution and development of sampling methods for Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) on snap beans and beans (Phaseolus vulgaris L.) , Revista Colombiana de Entomología: Vol. 31 No. 2 (2005)
Authors retain the copyright on their work and are responsible for the ideas expressed in them. Once a manuscript is approved for publication, authors are asked for a publication license for the term of legal protection, for all territories that allows the use, dissemination and disclosure of the same.