Banca de QUALIFICAÇÃO: DARLAN FERREIRA BORGES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: DARLAN FERREIRA BORGES
DATA: 17/07/2020
HORA: 08:00
LOCAL: Videoconferência (Google Meet)
TÍTULO:

MANUSCRIPT I - INCIDENCE AND SEVERITY OF ROOT ROT OF MUSKMELON ARE REDUCED BY THE INCORPORATION OF VEGETABLE RESIDUE INTO SOIL COVERED WITH POLYETHYLENE MULCH 

MANUSCRIPT II - EFFECTS OF ALTERNATIVE ROOT ROT PATHOGENS CONTROL TECHNIQUES ON SOIL MICROBIAL COMMUNITIES

PALAVRAS-CHAVES:

MANUSCRIPT I: Keywords: Fusarium, Macrophomina, Cucumis melo L., Disease management, Alternative control / MANUSCRIPT II: Keywords: soil microorganisms, mulching, cover crop, biological control, Cucumis melo L.

PÁGINAS: 41
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
RESUMO:

MANUSCRIPT I: INCIDENCE AND SEVERITY OF ROOT ROT OF MUSKMELON ARE REDUCED BY THE INCORPORATION OF VEGETABLE RESIDUE INTO SOIL COVERED WITH POLYETHYLENE MULCH

ABSTRACT: Melon (Cucumis melo L.) is one of the most important fruit crops in the Northeastern region of Brazil and nearly all production is exported to European countries. With the indiscriminate use of monoculture, the incidence of soilborne pathogens in melon fields is on the rise, resulting in increasing losses in fruit production. The objective of this study was to investigate if the incorporation of different vegetable materials (Crotalaria juncea L. and Pennisetum glaucum L.) in the soil, combined with polyethylene mulch, and the application of biological products (Compost-Aid® + Soil-Set®) can efficiently control soilborne pathogens in melon production. Two greenhouse experiments were identically set up using soil naturally infested with Fusarium spp. and Macrophomina spp. The experimental design was completely randomized, with seven treatments and seven replications. The pathogens’ occurrence, disease incidence, and severity were evaluated, as well as fruit quality characteristics (weight, firmness, and brix). Two treatments showed great potential for decreasing disease incidence and severity as well as the occurrence of the pathogens. One treatment had pearl millet (Pennisetum glaucum) incorporated into the soil that was covered with polyethylene mulch. Biological products (Compost-Aid® and Soil-Set®) were applied in high temperature and humidity. The other treatment was when crotalaria was incorporated into the soil, covered with polyethylene mulch, and biological products (Compost-Aid® and Soil-Set®) were applied in high temperature and lower humidity. These treatments also yielded fruits with higher weight and brix than the control treatment.

MANUSCRIPT II: EFFECTS OF ALTERNATIVE ROOT ROT PATHOGENS CONTROL TECHNIQUES ON SOIL MICROBIAL COMMUNITIES

ABSTRACT: Growers have long adopted monoculture to maintain the high melon (Cucumis melo L.) production demand in the Northeastern region of Brazil. This cultivating strategy culminates in up to three crop cycles per year being used. Little is known about the effect of monoculture on the soil microbiota, which can interfere with populations of soilborne plant pathogens that can result in crop losses. The main objective of this study was to evaluate if the incorporation of plant material (Crotalaria juncea L. and Pennisetum glaucum L.) used with polyethylene mulch, and or in association with commercial soil amendment products (Compost-Aid® + Soil-Set®) can help to condition an environment that is beneficial to soil microbial communities. Two identical greenhouse experiments were conducted using a completely randomized design with seven treatments and seven replications. The treatment (P+M+CS) (incorporation of P. glaucum + polyethylene mulch + (Compost-Aid® + Soil-Set®)) yielded the best results. Overall, it provided the highest increase in all microbial populations evaluated (actinomycetes, sporulating bacteria, total bacteria, and total fungi) in post-harvest. In sporulating bacteria populations after drilling a hole in the polyethylene mulch, (P+M+CS) also provided the highest population count. In the post-harvest, the (P+M+CS), and (P+M) (incorporation of P. glaucum + polyethylene mulch) treatments provided the highest count of Actinomycetes population. Taken all together, the incorporation of vegetal materials (P. glaucum or C. juncea) with the concomitant use of polyethylene mulch and the soil amendment products (Compost-Aid® and Soil-Set®), significantly increased the population of all soil microbes evaluated in this study. We strongly recommend this management strategy as soil health conditioner for agricultural lands heavily used for melon production.

MEMBROS DA BANCA:
Interno - 2578315 - JAILMA SUERDA SILVA DE LIMA
Presidente - 1544411 - MARCIA MICHELLE DE QUEIROZ AMBROSIO
Externo à Instituição - ROSEMBERG FERREIRA SENHOR - NENHUMA