| Sumario: | Seed transmission of Colletotrichuin dematiuin through cowpea seeds, and its control with fungicide seed treatments was studied at the Turipaná National Research
Center of ICA (Colombian Institute of Agriculture) located in Cereté (Córdoba). Two
out of eight genotypes tested showed significantly higher (a = 0.01) seed infection
levels; they also exhibited higher seed transmission rates of C. de,natiuin. Treatment
of infected seeds of line Licatur-1 with Benomyl (Benlate WP50, 3.0 gr/kg of seed) caused a significant reduction of seed infection levels (a = 0.01), and resulted in
comparable decreases in anthracnose incidence, measured 24 days after seedling
emergence in sand germinators. The effect of seed lot, soil type and fungicide seed
treatment on anthracnose incidence was also evaluated. Results indicated a highly
significant effect of seed lots, partially explained by environmental and seed crop
management variations. Anthracnose incidence, decreased when the seeds were
planted in a clay loam soil as compared to disease incidence in sand. Seed treatment with benomyl (Benlate WP50, 2.5 .3.0 gr/kg) or Mancozeb (Dithane M-45, 5.0
yr/kg) caused a significant reduction in anthracnose incidence. These results suggest that fungicide seed treatment is an effective control practice to prevent spread
of C. de,natiu,n through cowpea seeds.
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