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Thirty-four fungicides were applied to soil at the time the blast susceptible Fanny rice variety was planted in 1 m(2) plots, replicated twice. On the basis of blast incidence and spike development the most effective fungicides were Benlate, NF.44, Duter, Brestan and Desmosan
Electron microscopic examination of thin section from rice hoja blanca virus (RHBV)-infected barnyard [Echinocloa colonum (L.) Link] revealed the occurrence of large masses of flexuous, tubular particles, 8-10 nm wide, both in the cytoplasm and nucleus. These inclusions were absent in cells from ...
Sixty rice cultivars were planted in 20 m long plant beds 1.20 m wide at two locations: Meta Department where good temperature and humidity conditions exist for blast (Pyricularia oryzae) development, and Cauca Valley where temperature is near optimum but humidity is low. At the Cauca location th...
An expt. was established in Esparza (Costa Rica), on the integrated management of web blight (Thanatephorus cucumeris) in common beans under the min. tillage system. Var. Porrillo 70 (intermediate resistance) and ICA Pijao (susceptible) were used. Herbicides gliphosate and paraquat (1.0 kg/ha) of...
Uno de los principales problemas para la producción de maracuyá en el Valle del Cauca y otras regiones de Colombia es la incidencia de patógenos virales en este cultivo, principalmente un potyvirus y un tymovirus. Estos patógenos afectan el crecimiento de las plantas, disminuyendo su producción y...
Bean diseases such as rust (Uromyces phaseoli var. typica), web blinght (Thanatephorus cucumeris) and angular leaf spot (Isariopsis griseola), not only destroy plant foliage but also cuase physiological damage. To determine yield losses, the cv. ICA-Gualì and porrillo sintetico were artificially ...
Several species of fungi belonging to 20 genera were isolated from bean seeds obtained from small farmers in the states of Huila, Valle del Cauca, Antioquia and Narino (Colombia). Seeds from Huila had a higher percentage of fungi and germination in vitro was lower than for seeds from the other st...
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