RESUMO -o objetivo deste trabalho foi avaliar a qualidade e a biomassa de plantas de cupuaçuzeiro em substratos com diferentes condicionadores. o experimento foi realizado no Sítio ecológico Seridó, município de Rio Branco -aC. os tratamentos constituíram-se por alteração do condicionador dos substratos, sendo: T1 = casca de arroz carbonizada; T2 = fibra de coco; T3 = caule de palmeira; T4 = resíduo de sumaúma e T5 = composto orgânico. os substratos t1, t2, t3 e t4 foram compostos por terra (30%), composto orgânico (30%), fino de carvão (10%) e condicionadores (30%). O substrato (T5) foi considerado uma testemunha com maior proporção de terra (45%) e composto orgânico (45%) mais adição de fino de carvão (10%). Todos os substratos foram acrescidos de 1,0 kg m -3 de calcário dolomítico e 1,5 kg m -3 de termofosfato natural. o delineamento experimental utilizado foi em blocos casualizados, com cinco tratamentos e quatro repetições de três plantas cada. Foram avaliados aos 120 dias após a semeadura o número de folhas, a massa da matéria seca da raiz, a massa seca da parte aérea, a massa seca total, a altura da planta e o índice de qualidade da muda. Os substratos contendo fibra de coco, a fibra de caule de palmeira e o composto orgânico constituem alternativas viáveis como condicionadores de substrato para produção de muda de cupuaçu. Termos para indexação: Theobroma grandiflorum Schum, Qualidade. Propagação. SUBSTRATE CONDITIONERS FOR PRODUTION OF ORGANIC CUPUASU SEEDLINGABSTRACT -the objective of this study was to evaluate the quality and biomass of cupuassu plants on substrates with different conditioners. the experiment was conducted in the ecological Site Seridó, Rio Branco, acre State, Brazil. the treatments were a change of conditioner substrates, as follows: t1 = carbonized rice husk; T2 = coconut fiber; T3 = stem of palm; T4 = waste kapok and T5 = organic composte. T1, T2, T3 and T4 substrates were made by land (30%), organic compound (30%), fine coal (10%) and conditioners (30%). the substrate (t5) was considered a control with a higher proportion of land (45%) and organic compound (45%) plus addition of the fine coal (10%). All substrates were added to 1.0 kg m -3 dolomitic limestone and 1.5 kg m -3 natural thermo. the experimental design was a randomized block design with five treatments and four replications of three plants each. The numbers of leaves, root, shoot and total dry matter, plant height and seedling quality index development were assessed at 120 days after sowing. The substrates containing coconut fiber, palm stalk fiber and the organic composte are viable alternatives as conditioners substrate for cupuassu seedling.

This study aimed to evaluate the interference of bagging materials on the incidence of insect larvae and the physical and chemical quality of the guava cv. Paluma in an organic system. The experimental design was in randomized blocks with seven treatments and four replications of 25 fruits each. The bagging materials (treatments) were: nonwoven fabric (TNT), transparent plastic bag, white plastic bag, parchment paper, kraft paper, and non-bagged fruits (control). The titratable acidity (TA), ascorbic acid, soluble solids (SS), SS/TA ratio, fresh mass, fruit diameter, fruit length, appearance, and fruit fly incidence were evaluated. Fruit bagging increased the fresh fruit mass, except the tulle bag, which did not change fruit diameter but increased fruit length. There was a high incidence of fruit flies in the non-bagged fruits (100%) and in those with tulle bags (56.53%), reduced to 2.15% when using parchment paper, and reaching the absence of bored fruits when using nonwoven fabric, transparent plastic, and white plastic bags, materials that provided the highest percentages of marketable fruits. All bagging materials did not change the total titratable acidity content and the SS/TA ratio; however, all of them reduced the content of total soluble solids, except the tulle bag. Fruit bagging with nonwoven fabric and parchment paper increased the content of ascorbic acid. Fruit bagging with parchment paper, plastic bag, and nonwoven fabric are efficient in the organic production of guavas for preventing the infection by insect larvae and maintaining the physical and chemical quality of the fruit.