Quality of Pitaia Fruits Submitted to Field Bagging

Abstract

-In recent years, with the change in consumer profile, the demand for foods with low levels or even without pesticides has increased. Bagging fruits in the field is considered one of the oldest and effective phytosanitary practices, being an alternative to chemical control. The aim of the present work was to test some types of packaging in the bagging of pitaia fruits during their development in the plant in order to maintain quality. Red pitaia plant fruits [Hylocereus undatus (Haw.) Britton & Rose] five years post-planting were used. The experimental design used was random blocks, with 5 treatments, 4 repetitions and 10 fruits per plot. Treatments consisted of control (without bagging), newspaper bag, Kraft paper bag, waxed paper bag and Non-woven bag (NW). The following characteristics were evaluated: percentage of remaining fruits up to harvest; percentage of damaged fruits; fruit mass; longitudinal and transverse diameter; pulp yield; peel thickness; soluble solids content (SS); pH; titratable acidity (TA) and SS/TA ratio. There was no difference among treatments for most of the characteristics analyzed, except for percentage of remaining fruits on the plant and percentage of damaged fruits. Bagging does not alter the physical and chemical characteristics of red pitaia fruits. NW and newspaper bags are more effective in bagging pitaia fruits due to greater permanence in the fruit during its development in the plant. Index terms: Hylocereus undatus (Haw.) Britton & Rose, packaging, post-harvest quality. QUALIDADE DE FRUTOS DE PITAIA SUBMETIDOS AO ENSACAMENTO NO CAMPORESUMO -Nos últimos anos, com a mudança no perfil do consumidor, tem aumentado a exigência por alimentos com níveis reduzidos ou mesmo isentos de agrotóxicos. O ensacamento dos frutos no campo é considerado uma das práticas fitossanitárias mais antigas e eficazes, sendo uma alternativa ao uso do controle químico. Objetivou-se, no presente trabalho, testar alguns tipos de embalagem no ensacamento dos frutos de pitaia durante seu desenvolvimento na planta, visando à manutenção de sua qualidade. Foram utilizados frutos de plantas de pitaia-vermelha [Hylocereus undatus (Haw.) Britton & Rose] com cinco anos pós-plantio. O delineamento experimental utilizado foi em blocos casualizados, com 5 tratamentos, 4 repetições e 10 frutos por parcela. Os tratamentos foram constituídos da testemunha (sem ensacamento), saco de jornal, saco de papel Kraft, saco de papel-manteiga e saco de tecido não tecido (TNT). As seguintes características foram avaliadas: porcentagem de frutos remanescentes até à colheita, porcentagem de frutos danificados, massa dos frutos, diâmetro longitudinal e transversal, rendimento de polpa, espessura da casca, teor de sólidos solúveis (SS), pH, acidez titulável (AT) e relação SS/AT. Não houve diferença entre os tratamentos para a maioria das características analisadas, com exceção do percentual de frutos remanescentes na planta e do percentual de frutos danificados. O ensacamento não altera as características físicas e químicas ...

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Without Moths or Bats, Cacti form Friendships with Bees: Reproductive Biology of the Queen of Night Selenicereus Setaceus (Cactaceae) in São Thomé Das Letras, Brazil

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Ensacamento de inflorescências de copo-de-leite para proteção contra a abelha irapuá (Trigona spinipes)

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