Information about the production and quality of tomato cultivars under organic management and the conditions of climate and soil from the north region of Minas Gerais State, Brasil, are scarce. Thus, this research was carried out to evaluate the production and quality of tomato cultivars under organic management, in this region. The treatments consisted of four open pollination tomato cultivars (Chadwick Cherry, Pitanga vermelha, Santa Clara and Santa Cruz Kada) and five hybrid cultivars (Marguerita, Nicolas, Ellen, Magestade and Dominador). The experimental design was of randomized blocks with three replications. The experiment was carried out using organic fertilization in the initial preparation of the area, compost and rock phosphate and sprays with Bordeaux mixture, neem oil and fertilizer. The marketable yield varied from 12.3 t ha-1 to 23.9 t ha-1. The hybrid Marguerita presented higher marketable production (23.9 t ha-1). The cultivars Chadwick Cherry and Pitanga Vermelha reached similar production as most cultivars and larger proportions of marketable and giant fruits, and therefore, better market quality. All the cultivars presented low potassium and manganese levels in foliar tissue suggesting an evaluation after various organic manuring cycles and better nutrition conditions are necessary to permit the comparison of the performance of cultivars in this system.

ResumoO objetivo do estudo foi verificar o efeito do sombreamento na produção de óleo essencial, biomassa e quantidade de tricomas glandulares em cidrão (Lippia citriodora Lam.) no Norte de Minas Gerais. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos e cinco repetições. Os tratamentos consistiram em quatro níveis de radiação fotossinteticamente ativa (RFA) utilizando telas tipo sombrite que permitem a passagem de 25, 50, 70% de luz e a pleno sol (controle). Foram determinadas as variáveis: matéria seca da raiz, matéria seca da parte aérea, número de flores, matéria seca total, relação raiz/parte aérea, produção de óleo, teor de óleo essencial e quantidade de tricomas glandulares. Foram observadas diferenças estatisticamente significativas para massa seca da raiz, massa seca da parte aérea, número de flores, matéria seca total, razão raiz/ parte aérea, produção de óleo e quantidade de tricomas, todavia o mesmo não ocorreu para o teor de óleo. Os resultados evidenciaram que a pleno sol houve uma maior produção de biomassa que nos demais tratamentos e no sombreamento de 70% o número de tricomas foi maior. O teor de óleo não sofreu nenhuma alteração em relação aos tratamentos. AbstractInfluence of shade on the biomass and essential oil production of Lippia citriodora (Lam.), Brazil. This study aimed to evaluate the effect of shading on the production of essential oil and biomass in Lippia citriodora (Lam.) -known as cidrão -in the north of Minas Gerais, Brazil. The experimental design was Biotemas, 22 (4): 9-14, dezembro de 2009

RESUMO:O presente trabalho objetivou avaliar a calagem e adubação orgânica na produção de biomassa e óleo essencial em Lippia citriodora Kunth. O delineamento experimental utilizado constou de fatorial 7 x 2, sendo sete tratamentos (testemunha; adição de sulfato de Ca e Mg; calcário dolomítico; silicato de Ca e Mg; sulfato de Ca e Mg + esterco de curral; calcário dolomítico + esterco de curral; silicato de Ca e Mg + esterco de curral) e duas épocas de colheita, com quatro repetições, inteiramente casualizado (DIC). Verificou-se que a correção do solo mostrouse prática necessária para o desenvolvimento da Lippia citriodora. Independentemente da época de colheita, a produção de massa fresca e seca foi maior com a aplicação do esterco de curral (32 t ha -1 ), no entanto, isso não refletiu em maior rendimento de óleo essencial. Palavras-chave: calcário, silicato, adubação orgânicaABSTRACT: Liming and organic fertilization on Lippia citriodora (Kunth) phytomass and essential oil production. The present work aimed to evaluate the effect of liming and bovine fertilization on Lippia citriodora Kunth phytomass and essential oil production. The experimental design was completely randomized with seven treatments (control; Ca and Mg sulfate; limestone; Ca and Mg silicate; Ca and Mg sulfate + manure; limestone + manure; Ca and Mg silicate + manure) and two harvest seasons, with four replicates. Soil adjustment showed to be a necessary procedure for Lippia citriodora development. Independently of the harvest season, fresh and dry matter yields were higher under treatments with bovine manure (32 t ha -1 ); however, no effect of treatments was observed on essential oil concentration.

ABSTRACT. The objective of this work was to evaluate the use of plastic bags to protect the fruits of Annona crassiflora (Annonaceae) against Cerconota sp. (Lepidoptera: Oecophoridae). As protection against this fruit-boring insect, 100 fruits were enclosed in plastic bags. Another 100 fruits were not bagged. The fruits were selected from the following five ranges of diameters: 1 = 0.5 -1.99; 2 = 2.00 -3.99; 3 = 4.00 -7.90; 4 = 8.00 -11.90; and 5 = 12.00 -16.00 cm. The bagged fruits of various diameters were attacked less frequently by the pest. The bagged fruits with a diameter of less than two cm were not attacked. The percentage of fruits attacked and the number of larvae/fruit increased as the diameter of fruits increased in both treatments. The bagged fruits initially less than two cm in diameter showed the greatest final diameter and height.