LIMA FILHO, P.; http://lattes.cnpq.br/9597394008673859; LIMA FILHO, Pedro.
Resumo:
The culture of watermelon can be affected by various pathogens that act on the root system of
plants, affecting the absorption and transport of water and nutrients, interfering in the processes
vital to their development.The experiments were conducted in the CCTA / UFCG, Campus de
Pombal. The first evaluated the effect of different doses (0,14mL, 28ml, 56ml and 112mL /
plant) of Bokashi organic compound in the control of root rot caused by Fusarium spp. in two
simultaneous steps using sterile soil and non-sterile in greenhouse doses were applied weekly
using the watermelon cultivar 'Crimson Sweet' that was sown in pots containing six kilograms
of clay soil, made up of six treatments with five repetitions. We evaluated total soil microbial
population, collected at 0, 30, and 60 days after planting watermelon and to a depth of about 10
cm and close to the root system beyond the incidence and severity of root rot, dry and fresh
matter of watermelon. The second field experiment evaluating the top two doses of organic
compost 'Bokashi, (112ml and 56ml) of the previous experiment and other doses (224ml and
0ml), distributed as follows (with Trichoderma 112ml, 112ml without Trichoderma, with
Trichoderma 56ml, 56ml without Trichoderma, with Trichoderma a 224ml, 224ml without
Trichoderma, 0ml with Trichoderma, 0ml without Trichoderma) totaling eight treatments and
five replications which were assessed the incidence and severity of root rot and the agronomic
characteristics of culture as a mass accumulation of plants, photosynthetic rate (a), stomatal
conductance (gs), transpiration (E) and intercellular CO2 concentration (Ci), fresh and dry
matter of shoot and total production of fruits. In the study of greenhouse treatments with 56ml
dose of Bokashi associated with Trichoderma and what used dose of 112ml of Bokashi
achieved significant results in reducing fungal pathogens incidence in watermelon planted in
non-sterile soil and severity of root rot Fusarium spp in sterile soil. In the field dose of 112ml
Bokashi associated with Trichoderma achieved a reduction in both the incidence of fungal
pathogens as the severity of root rot in watermelon. Bokashi associated with Trichoderma got
better control the incidence and severity of root rot in watermelon.