RESUMO Dimorphandra mollis é nativa do Cerrado e possui importância social, econômica e ambiental. Objetivou-se avaliar a produtividade e distribuição diamétrica de Dimorphandra mollis Benth. na Área de Proteção Ambiental do Rio Pandeiros, em Bonito de Minas, Minas Gerais. Foram avaliadas cinco áreas, totalizando cinco hectares (50 parcelas de 1.000 m2). O número total de plantas, produtividade por planta (2018, 2019 e 2020) e diâmetro à altura do peito foram registrados, considerando-se todas as árvores das parcelas em classes diamétricas. O diâmetro médio à altura do peito de todas as plantas foi de 6,05 ± 3,07 cm, e o das plantas que tiveram produção em pelo menos um dos anos avaliados foi de 7,46 ± 3,15 cm. A distribuição diamétrica apresentou classes sem indivíduos, indicando desequilíbrio, bem como tendência ao formato de “J” invertido. A produtividade anual máxima foi de 8,08 kg ha-1 de frutos secos (2019), a mínima de 0,42 kg ha-1 (2018) e a média de 2,74 kg ha-1, com característica de bienalidade.

ABSTRACT Dimorphandra mollis is native to the Brazilian Savanna and has social, economic and environmental importance. This study aimed to evaluate the yield and diametric distribution of Dimorphandra mollis Benth. in the Pandeiros River Environmental Protection Area, in Bonito de Minas, Minas Gerais state, Brazil. Five areas were assessed, totaling five hectares (50 plots of 1,000 m2). The total number of plants, yield per plant (2018, 2019 and 2020) and diameter at breast height were recorded, considering all trees from the plots in diametric classes. The average diameter at breast height of all plants was 6.05 ± 3.07 cm, and that of the plants that produced in at least one of the evaluated years was 7.46 ± 3.15 cm. The diametric distribution showed classes with no individuals, indicating imbalance, as well as a trend to inverted “J” shape. The maximum annual yield was 8.08 kg ha-1 of dry fruits (2019), the minimum 0.42 kg ha-1 (2018), and the average 2.74 kg ha-1, with biennial characteristic.

A mandioca é a sexta cultura mais importante no mundo, sendo atacada por diversas pragas, incluindo Erinnyis ello (Linnaeus) (Lepidoptera: Sphingidae). Este lepidóptero apresenta inimigos naturais que podem controlar de forma eficiente sua população, destacando os parasitoides oófagos Trichogramma spp. (Hymenoptera: Trichogrammatidae). O objetivo deste trabalho foi avaliar Trichogramma pretiosum, T. marandobai e T. demoraesi quanto à sua capacidade de parasitismo, emergência e voo, visando selecionar a espécie mais eficiente para programas de controle biológico. Os parâmetros biológicos foram avaliados em unidades teste, consistindo de um cilindro de PVC com um circulo de plástico rígido e transparente no topo e um disco de poliestireno vedando a parte inferior. Um tubo de ensaio contendo 300 ovos de Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae) parasitados por Trichogramma foi colocado no interior da unidade. Trichogramma pretiosum apresentou maior capacidade de voo (68 ± 5%) e porcentagens de parasitismo (74 ± 2%) e emergência de adultos (91 ± 3%) em laboratório, sendo indicado para criação e liberação em programas de controle biológico.

Cassava is the sixth most important crop in the world, and it is attacked by many pests, such as Erinnyis ello (L.) (Lepidoptera: Sphingidae). This lepidopteran pest has natural enemies that can efficiently control its population, such as Trichogramma spp. (Hymenoptera: Trichogrammatidae). The objective of this research was to assess the flight capacity, parasitism and emergence of Trichogramma pretiosum, T. marandobai and T. demoraesi and to select the most efficient species among them for biological control programs. The flight capacity of these species was assessed in test units consisting of a plastic PVC cylinder with a rigid, transparent plastic circle on the upper portion of the cylinder and an extruded polystyrene disk to close the bottom of the cylinder. A tube was placed in each test unit containing a card with 300 Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae) eggs that had been parasitised by Trichogramma. These cards were later assessed to determine the parasitism rate and adult emergence of these natural enemies. Trichogramma pretiosum presented the highest flight capacity (68 ± 5%), parasitism (74 ± 2%) and percentage of adults emerged (91 ± 3%) in the laboratory, making this species suitable for mass rearing and release in biological control programs.

The objective of this work was to assess the flight capacity, parasitism and emergence of Trichogramma atopoviriliaand two strains of T. pretiosum (Hymenoptera: Trichogrammatidae) (L1 and L2). The flight capacity of these species was assessed in test units consisting of a plastic PVC cylinder with a rigid transparent plastic circle on the upper part and an extruded polystyrene disk closing its bottom. A tube was placed in each test unit containing a card with 300 Anagasta kuehniella (Lepidoptera: Pyralidae) eggs parasitised by Trichogramma. These cards were assessed to determine the parasitism rate and adult emergence of these natural enemies. T. atopovirilia and T. pretiosum L1 presented adequate flight capacity and parasitism, in addition to high percentages of adults emerged.