Drip fungigation in early blight control of tomato = Fungiga o por gotejamento no controle da pinta preta do tomateiro

The aim was to verify if the fungigation via drip irrigation is an alternative to the conventional method of spraying on tomato for controlling early blight. Tomato plants (variety Santa Clara) were grown in pots inside a greenhouse. Fifty days after transplanting, the plants were inoculated with Alternaria solani and treated with four different fungicides: azoxystrobin (8 g 100 L-1), difeconazole (50 mL 100 L-1), metiram+piraclostrobin (200 g 100 L-1) and tebuconazole (100 mL 100 L-1) using two applications methods: conventional spraying and fungigation dripping. The control plants did not receive fungicide application. To assess the severity of the disease, we used a rating scale expressed as the area under the disease progress curve (AUDPC) and production factors, such as number, weight and average diameter of the fruit and its productivity. The experimental design was completely randomized in factorial scheme 4 x 2 + 1 with eight replicates. Each plot had one plant in one pot. A 27% reduction in disease severity was observed when compared with the control plants, with no significant difference noted regarding the application method. The number of fruits did not statistically differ between the treatments. The average weight and diameter of the fruits were superior in the plants that had fungicide application compared to the control plant, reflecting an increase inproductivity. Fungigation through water dripping is an alternative to the conventional method of spraying cultured tomatoes. O objetivo foi verificar se a fungiga o via gotejamento é uma alternativa ao método convencinal de pulveriza o no controle da pinta-preta do tomate. Plantas de tomate (var Santa Clara) foramcultivadas em vasos instalados no interior de uma casa-de-vegeta o. Aos 50 dias após o transplantio, foram inoculadas com Alternaria solani e tratadas com quatro diferentes fungicidas: azoxystrobina (8 g 100 L-1), difeconazole (50 mL 100 L-1), metiram+piraclostrobin (200 g 100 L-1) e tebuconazole (100 mL 100 L-1), em duas formas de aplica o: pulveriza o convencional e fungiga o por gotejamento. Uma testemunha n o recebeu aplica o de fungicidas. Avaliou-se aseveridade da doen a através de escala de notas expressa em área abaixo da curva de progresso da doen a (AACPD) e fatores de produ o, como número, peso e diametro médio dos frutos e produtividade. O delineamento experimental foi 4 x 2 + 1, com oito repeti es. Cada parcela constou de uma planta em um vaso. Houve redu o da severidade da doen a de 27% em compara o com a testemunha. N o houve diferen a significativa entre