Índices de dispersión de casinaria sp y brachymeria sp parasitoides de antichloris viridis druce en la temporada invernal

Abstract:

In the winter period of the year 2011 in the Treasury Celia Maria S.A, was carried out the relative study to biological list of the parasitoids Casinaria sp (Himenóptera: Braconidae) and Brachymeria sp (Himenóptera: Chalcididae) in the regulation of the populations of "caterpillar" Antichloris viridis Druce, about the following objectives: 1.To determine the parameters of dispersion aggregative of a plantation of Casinaria sp and Brachymeria sp parasitoids of larvas and pustules of the "caterpillar" in banana tree; 2.To contribute with the reinstatement of specimens of the collection entomológica of the CIAP giving mounted specimens and conserved in solutions of AGA. For three serial generations of the plague presented from the second week from enero to mayo/2011, you monitored the population to determine the larval density and the presence of the parasitoid Casinaria sp. It was collected pustules in the base of the plant, maintaining them in observation for two serial weeks, until obtaining the parasitoids emergency, specifically Brachymeria sp. The samples took in four sectors of the plantation which has a surface of 330 hectares. The density populations of medium larvas and the big ones, in the first generation he/she stayed inside a range average from 10.4 to 17.1 larvas por hoja with variances that overcame to the averages, evidencing the character aggregative of the plague. In the second and third generation, the density was increased to be located in approximately 28.8 to 44.2 larvas/hoja, being also increased the variance. Casinaria sp, parasitoid of the caterpillars of Antichloris viridis Druce didn't register in the period of study in most of the lots monitoreados neither in the whole plantation, the same as other parasitoids (Meteorus and Elachertus), due to the pruning fitosanitaria of the leaves with air burned by the mushroom of the black sigatoka. The only present parasitoid at pustule level was the black wasp of the family Chalcididae, gender Brachymeria, non identified species. This species acts permanently on pustules located in leaves and in the low part of the plant. The levels of parasitism were variable in the different sectors monitoreados reaching maximum levels of 42%. The indexes of dispersion of the larval estadíos of Antichloris viridis Druce was adjusted to the pattern of Space Distribution Aggregative, to the being the stocking of the density of inferior leaves/larvas to the variance.

Año de publicación:

2015

Keywords:

• CASINARIA
• TEMPORADA INVERNAL
• PARASITOIDES
• ÍNDICES DISPERSIÓN

Fuente:

rraae