ACTION THRESHOLD FOR THE CONTROL OF THE WHITE FLY OF THE GREENHOUSES, Trialeurodes vaporariorum (Westwood) (Homoptera: Aleyrodidae), IN GREEN BEANS
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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.
- 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)
- CÉSAR CARDONA, LUIS CARLOS PACHECO, FRANCISCO RENDÓN, INSECT POPULATIONS, PESTS AND BENEFITS IN COTTON SOCAS ON THE ATLANTIC COAST. METHODS AND TIMES OF DESTRUCTION , Revista Colombiana de Entomología: Vol. 5 No. 3-4 (1979)
- JORGE GARCÍA, CÉSAR CARDONA, JUÁN RAIGOSA, EVALUATION OF POPULATIONS OF PEST INSECTS IN THE ASSOCIATION SUGAR CANE - BEAN AND ITS RELATION TO PERFORMANCE , Revista Colombiana de Entomología: Vol. 5 No. 1-2 (1979)
- 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)
- CÉSAR CARDONA, JOAQUÍN GONZÁLEZ, EFFECT OF CULTURAL PRACTICES ON THE INCIDENCE AND NATURAL CONTROL OF Rupela albinella IN TWO VARIETIES OF RICE AND ITS RELATION TO YIELDS , Revista Colombiana de Entomología: Vol. 5 No. 1-2 (1979)
- PEDRO C. PRADA, ADELA RODRÍGUEZ, CÉSAR CARDONA, EVALUATION OF AN INTEGRATED PEST MANAGEMENT SYSTEM FOR GREEN BEANS IN THE PROVINCE OF SUMAPAZ (CUNDINAMARCA) , Revista Colombiana de Entomología: Vol. 19 No. 2 (1993)
- FRANCISCO RENDÓN, CÉSAR CARDONA, JUAN M. BUENO, Losses caused by Trialeurodes vaporariorum (Homoptera: Aleyrodidae) and Thrips palmi (Thysanoptera: Thripidae) on snap beans in the Cauca Valley of Colombia , Revista Colombiana de Entomología: Vol. 27 No. 1 (2001)
- JUAN MIGUEL BUENO, DARÍO RAMÍREZ, CÉSAR CARDONA, The biology, habits and food plants of the whitegrub Macrodactylus near ovaticollis (Coleoptera: Scarabaeidae) , Revista Colombiana de Entomología: Vol. 24 No. 1 (1998)
- BENJAMÍN JARA, ALFREDO ACOSTA, CÉSAR CARDONA, EFFECT OF FIVE BEAN VARIETIES ON THE BIOLOGY AND FERTILITY OF THE RED SPIDER, Tetranychus desertorum BANKS. (ACARI, TETRANYCHIDAE) , Revista Colombiana de Entomología: Vol. 7 No. 1-2 (1981)
- JUAN MIGUEL BUENO, CÉSAR CARDONA, CONSTANZA MARÍA QUINTERO, Comparison between two improvement methods to develop multipie insect resistance in common bean (Phaseolus vulgarís L.). , Revista Colombiana de Entomología: Vol. 25 No. 1 (1999)
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