Comportamento das mudas de jabuticabeira (Plinia sp.) após aplicação de onze herbicidas

Abstract

The jabuticabeira (Plinia sp.) is one of the species of great importance in the Brazilian flora with nutraceutical value and great concern by its consumers due to its consumption, in addition to the fresh fruit being found in several products such as jellies, sweets, flour, ice cream and cosmetic line. For the establishment of orchards, it is necessary to determine forms of management that favor the development and productivity of this culture. The analysis of the behavior of jabuticabeira seedlings (Plinia sp.) pointed out the mortality of individuals, in addition to the phytotoxicity of the species. A completely randomized design was used with 4 replications, with 20 plants per treatment, using as experimental unit the plant cultivated in a pot with 3L of substrate. The treatments used consisted of 50% of the commercial dose of herbicides: Dual Gold®, Spider®, 2,4-D Damine®, Ally®, Enlist®, Primatop®, Fusilade®, Imazethapyr®, Flex®, Plemum®, the application was carried out with a costal sprayer, with a manometer coupled and a bar containing two nozzles, with a TT110.02 fan-type pointer, spaced 0.5m², operating at 250 Kpa of pressure. Visual effects were described in terms of wrinkled, necrotic and yellowish leaves, the survival of plants was determined by the percentage of live plants in relation to the total number of plants in each repetition. The design was completely randomized. The analyzed data were submitted to the normality test and then submitted to analysis of variance (ANOVA) and Duncan's mean comparison test (α = 0.05). In the analysis of survival, the highest mean was for the control and for seedlings sprayed with the herbicides Ally®, Enlist®, Plenum®, Flex® and Imazethaphyr®. The lowest survivals were recorded for seedlings sprayed with Dual Gold®, Volcane® and Primatop® herbicides. This effect provided the lowest chlorophyll “b” content for seedlings sprayed with Volcane®, Fusilade®®, Imazataphyr® and Primatop® herbicides. Chlorophyll “a” content had the highest average in seedlings sprayed with the herbicide Imazetaphyr.