Sarsina violascens spatial and temporal distributions affected by native vegetation strips in eucalyptus plantations

Abstract

-The objective of this work was to evaluate spatial and temporal distributions of Sarsina violascens (Lepidoptera: Noctuidae: Lymantriinae) in two Eucalyptus cloeziana plantations, one with native vegetation strips (WNVS) and another without them (ONVS). Adults were collected with light traps, which were installed: inside an area of native vegetation (Cerrado), 100 m from the edge; at the contact zone between the native vegetation area and the E. cloeziana plantation; inside the E. cloeziana plantation, 250 m from the edge; at the central part of the native vegetation strip, around 500 m from the edge (WNVS) or in the contact zone between two E. cloeziana compartments (ONVS); and inside the E. cloeziana plantation, 500 m from the edge. The number of S. violascens adults collected was 240 in the system WNVS and 1,378 in the system ONVS. The lower number of individuals in the system WNVS was probably due to favored biological control provided by higher species richness with the use of native vegetation strips. These strips, intermingled with E. cloeziana plantations, allow a higher proportion of native forest in the landscape and can help to reduce S. violascens infestations.

Chemical vs entomopathogenic control of Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) via aerial application in eucalyptus plantations

“…Eucalyptus plantations occupy 5.7 million hectares, representing 72% of the total planted trees in this country 3 . Homogeneous forests may be more susceptible to pests 4–6 reducing productivity of Eucalyptus plants 7–9 .…”

Management ofHylesia nanus(Lepidoptera: Saturniidae) onEucalyptus(Myrtaceae) Plantations

“…The presence of Saturniidae adults is monitored with light traps on eucalyptus plantations to determine when the application of con-trol methods becomes necessary to prevent the build-up of large pest populations (Dall'Oglio et al 2013;Ribeiro et al 2016;Zanuncio et al 2016a). Palmistichus elaeisis Delvare & La Salle (Hymenoptera: Eulophidae) is a generalist endoparasitoid that is easily mass reared in the laboratory using pupae of alternative hosts such as mealworms, Tenebrio molitor L. (Coleoptera: Tenebrionidae).…”

Analysis of the vertical canopy structure in native forest fragments and <i>Eucalyptus</i> plantations to detect edge effects

“…Moreover, native forests within silviculture properties help to maintain ecosystem services, such as provision and maintenance of water flow throughout the year (Little et al 2015, Christina et al 2018, Dresel et al 2018, diversity of local flora and fauna species, crop pollinators and natural pest control (Zanuncio et al 1998(Zanuncio et al , 2016. With our findings, we emphasise another reason to protect native forests in silviculture areas given their capacity to minimise edge effects: assist in maintaining the stand homogeneity, guaranteeing border…”