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Rodriguez H.,Agricultural University of Havana | Ramos M.,Instituto Superior Of Tecnologias Y Ciencias Aplicadas | Montoya A.,Centro Universitario de Guantánamo | Rodriguez Y.,Institute Investigaciones Horticolas Liliana Dimitrova | Depestre T.L.,Institute Investigaciones Horticolas Liliana Dimitrova
Biotecnologia Aplicada | Year: 2011

The broad mites, Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) is a cosmopolitan pest of many important crops as potatoes, beans, peppers, and citrus which lives in tropical, subtropical regions and greenhouses worldwide. Acording to its biological and ethological characteristics its control is complex by traditional methods of plant protection. For this reason, the use of the predatory mites of the Phytoseiidae family is an adequate and efficient management alternative. The present paper comprises the characterization of the potentiality of Amblyseius largoensis (Muma) (Acari: Phtyoseiidae) as biological control agent of P. latus integrating, for the first time, the predator's biological characteristics; feeding behavior and the numeric and functional responses; development of methodologies for mass rearing of the biological agent and parameters for quality control processes; the study of pest behavior in the protected production of Cuban hybrids of pepper, adapting the sampling methodology and determining the thresholds to estimate the population levels in these conditions. The compatibility of this predator with the principal chemicals and biological products used in the protected production and their effectiveness as biological control agent of P. latus in different conditions were evaluated. The results obtained demonstrated that A. largoensis is a new biological alternative for the management of broad mite populations in the protected production of peppers, which could be used in other agroecosystems; those that P. latus constitutes a problem, prior validation.

Hernandez Diaz M.I.,Institute Investigaciones Horticolas Liliana Dimitrova | Chailloux Laffita M.,Institute Investigaciones Horticolas Liliana Dimitrova | Moreno Placeres V.,Institute Investigaciones Horticolas Liliana Dimitrova | Igarza Sanchez A.,Institute Investigaciones Horticolas Liliana Dimitrova | Ojeda Veloz A.,Institute Investigaciones Horticolas Liliana Dimitrova
Idesia | Year: 2014

The production of horticultural crop in protected systems implies a very intensive exploitation of the cultivation, for what is required of the continuous supervise to maximize its nutrition and yield, more even when its exploitation is carried out in soil, because the magnitude of the interactions that happen between the nutritious solution and the same soil is ignored. The study was carried out in the "Liliana Dimitrova" Horticultural Research (Mayabeque, Cuba) in a typical Red Ferralitic soil in winter and spring-summer. The hybrid commercial HAZERA 3019 was used. It was make the characterization of the solution fertilizer and soil solution, for this last one it placed inside the installation eight suction cups. It was determined the pH, the NO3 -, K+, Ca++ and Mg++ concentration and the electric conductivity (EC). It was quantified the total dry mater, the absorption of N, P, K, Ca and Mg and the yield. The cultivation variables evaluated during the winter went superiors statistically to the quantified in spring-summer. The concentration of nutrients in suction cups varied in dependence of the plantation time, the cultivation phase and the element characteristics. The high NO3 - and K+ mobility and the presence of superiors indicators productive and growth in winter conditioned their decrease with relationship to the solution fertilizer, while the Ca++ and Mg++ was accumulated in the soil. The concentrations of NO3 -, K+, Ca++ and Mg++ in suction cups in spring-summer were respectively in a range of 5.99-9.06, 3.16-7.68, 2.91-4.27 and 1.34-2.14 meq/L. In winter they varied among 6.87-11.47, 2.89-8.83, 2.81-5.60 and 1.04-2.31 meq/L. The maximum variation obtained for the CE in suction cups was of 0.50 mS/cm with relationship to the fertilizer solution.

Off-season vegetables become expensive so new technological systems are required to grow cultivars well adapted to climatic conditions throughout the year. Accordingly, a trial was performed to test 12 tomato F1 commercial hybrids in a Cuban sheltered installation based on the "umbrella" effect recommended for tropical conditions. The main goal of the trial was to study cultivar productivity and adaptation traits before offering recommendations to growers. The '37242' (7.4 kg plant -1) and 'Setcopa' (7.1 kg ha -1) F 1 hybrids showed the highest marketable yields, commercialized at 93% and 87%, respectively. The performance of the '37242' was notable; its high fruit set (87%) during the hot and wet season showed its adaptation to the local conditions. The studied cultivars were asymptomatic to tomato yellow leaf curl virus (TYLCV), despite its high prevalence in the area.

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