. This study aimed to evaluate qualitatively and quantitatively the Hypsipyla grandella (Zeller) damage in fruits of mahogany in Brasilia, Brazil. For this, fruits were collected and the analysis of each fruit was carried out by assessing the following parameters: fruit weight, fruit length and height, number of holes in fruits characteristic of H. grandella attack, size of the holes, number of larvae and pupae of H. grandella , number of seeds damaged and presence of other insects within the fruit. As a result, 190 (95%) had holes made by the larvae, used primarily for their entry and for exit later as an adult. Most of the fruits showed only a single hole (81%), but up to 5 holes were found in a single fruit. A single caterpillar can feed on various seeds, causing major damage when they attack together. Seventy-two (36%) fruits had all the seeds damaged by H. grandella , especially those containing pupae. 183 larvae in different instars and 45 pupae were found. Only five caterpillars were found dead inside of fruit, representing 2.78% of the caterpillars. Danos em frutos de mogno causados pela Hypsipyla grandella (Zeller) (Lepidoptera: Pyralidae) em Brasilia, Brasil Resumo. Este trabalho teve como objetivo avaliar qualitativamente e quantitativamente os danos provocados por Hypsipyla grandella (Zeller) em frutos de mogno em Brasilia, Brasil. Para isso, frutos foram coletados e os seguintes parâmetros foram analisados: peso, comprimento, numero de orificios causados pela H. grandella , numero de sementes danificadas e presenca de outros insetos no interior dos frutos. Como resultado, 190 (95%) frutos apresentaram orificios feitos pela lagarta, usados primordialmente para sua entrada e posteriormente para a saida, quando adulto. A maioria dos frutos apresentou apenas um orificio (81%), mas ate cinco furos foram encontrados em um unico fruto. Uma unica lagarta pode se alimentar de varias sementes, causando grandes danos. Setenta e dois frutos (36%) tinham todas as sementes danificadas por H. grandella , especialmente aqueles que apresentaram pupas. 183 lagartas em diferentes estadios e 45 pupas foram encontradas. Apenas cinco lagartas foram encontradas mortas dentro dos frutos, representando 2,78% do total.

https://dialnet.unirioja.es/descarga/articulo/6466703.pdf

Damage in fruits of mahogany caused by Hypsipyla grandella (Zeller) (Lepidoptera: Pyralidae) in Brasília, Brazil

The expansion of African mahogany cultivation in Brazil, as well as other exotic species, refers to the appearance of pests and diseases previously unreported in the literature. In this sense, samples suspected of containing a new species of cochineal species attacking the bark, branches and stems of African mahogany plants and parasitized by a microhimenopter, were collected in a ten hectare plantation with five years of age on a farm in the municipality of Canta, Roraima state, Brazil. The sampled material contained lecanodiaspididae in all stages of development, eggs, nymphs and adults, both male and female, which were identified as Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Lecanodiaspididae). The associated parasitoid was identified as Cephaleta sp. (Hymenoptera: Pteromalidae) presenting great potential in the biological control of Lecanodiaspis dendrobii. This is the first attack record of Lecanodiaspis dendrobii (Hemiptera: Lecanodiaspididae) and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae) in African mahogany in Brazil.

/pdf/ocorrencia-de-lecanodiaspis-dendrobii-hemiptera-faj7fsuvvb.pdf

Ocorrência de Lecanodiaspis dendrobii (Hemiptera: Lecanodiaspididae) e do parasitoide associado Cephaleta sp. (Hymenoptera: Pteromalidae) em mogno africano no Brasil

The objective of this study was to analyze the adaptive cluster sampling (ACS), simple random sampling (SRS) and systematic sampling (SS) processes to obtain the number of ha-1 trees of Carapa guianensis Aubl. in the Amazon. The data were obtained through 100% inventory and sampling simulations, considering a DBH ≥ 25 cm, a sampling intensity of 4%, a maximum error of 10% and plots of 0.09, 0.16 and 0.25 ha. The last two sizes were only used to analyze their effect on the ACS estimators. The processes were evaluated for accuracy, precision (E%) and confidence interval (CI), while the mean ha-1 of the processes were compared with that of the 100% inventory by the Z test. The ACS process showed no significant difference between its average ha-1 trees and the 100% inventory, and it was also the most accurate and the only one whose CI was true. However, it presented a final sample intensity 3.6 times greater than the simple and systematic random samplings, in addition to E% above 10%, which makes it unacceptable, legally, and economically unfeasible. The other processes had densities significantly higher than the 100% inventory, with sample intensities lower than ACS and E% lower than 10%, making them legally viable. The use of larger plots in the ACS implies larger clusters and a greater tendency to underestimate the number of trees, resulting in larger sample errors and less accuracy.

/pdf/sampling-processes-for-carapa-guianensis-aubl-in-the-amazon-23nqk1k2rv.pdf

SAMPLING PROCESSES FOR Carapa guianensis AUBL. IN THE AMAZON

Resumo . Objetivou-se com o presente estudo registrar a ocorrencia de Hypsipyla grandella (Zeller) atacando sementes de andiroba ( Carapa guianensis Aubl) em floresta nativa, na regiao sul do estado de Roraima, Brasil. Dentre as especies de interesse economico na Amazonia, se destaca Carapa guianensis , por ser nativa e de multiplo uso, sendo a madeira e o oleo extraido de suas sementes, seus produtos mais importantes. As plantas da familia Meliaceae como C. guianensis e Swietenia macrophylla (King) tem como uma das principais pragas florestais a H. grandella. A coleta das sementes de C. guianensis foi realizada nos meses de fevereiro e marco de 2012, tendo-se selecionado as que estavam sobre o solo embaixo da copa das arvores, e danificadas (presenca de furos), ou com vestigios de ataque (exsudacao de goma sobre as sementes) por insetos . Em seguida as mesmas foram levadas ao Laboratorio de Entomologia Agricola da Universidade Federal de Roraima - UFRR, onde foram separadas em lotes de 50 sementes, por municipio totalizando 200 sementes. Constatou-se nas sementes a presenca de 450 larvas de Hypsipyla , as quais originaram 392 (87%) adultos de Hypsipyla ferrealis (Hampson) e 58 (13%) de H. grandella . Este e o primeiro registro de ocorrencia de H. grandella danificando sementes de C. guianensis em Roraima. Occurrence of Hypsipyla grandella Zeller ( Lepidoptera, Pyralidae) in the South of Roraima State Abstract. The study aimed to record the occurrence of Hypsipyla grandella (Zeller) attacking andiroba ( Carapa guianensis Aubl) seed, in native forest of Roraima southern region, Brazil. Among the species of economic interest in the Amazon, stands out C. guianensis , by to be native and of multiple uses, having wood and the oil extracted from seeds as the most important products. The Meliaceae family plants, as C. guianensis and Swietenia macrophylla (King), have as a major forest pest, H. grandella . The C. guianensis seeds samplings were held in February and March 2012. The seeds were selected on the ground beneath the canopy of trees, and those which had damage (holes presence), or with insects attack trace (exudation). The seeds were brought to the Agricultural Entomology laboratory, of Federal University of Roraima - UFRR, which were separated into batches of 50 seeds per municipality, totaling 200 seeds. It was observed the presence of 450 Hypsipyla larvae in the seeds, which yielded 392 (87%) adults of Hypsipyla ferrealis (Hampson) and 58 (13%) of H. grandella . This is the first occurrence of H. grandella damaging andiroba seeds in Roraima.

https://dialnet.unirioja.es/descarga/articulo/5652313.pdf

Tatiane Marie Martins Gomes de Castro

Papers

Ocorrência de Hypsipyla grandella Zeller (Lepidoptera, Pyralidae) no Sul do Estado de Roraima