Detection of pine woodwasp in Pinus taeda in São Paulo State, Brazil

ABSTRACT: The woodwasp Sirex noctilio (Fabricius) (Hymenoptera: Siricidae) is one of the main pests of Pinus plantations in South America. The aim of this study is to report the occurrence of S. noctilio in Pinus taeda in Botucatu, São Paulo, Brazil. The surveys were carried out in the arboretum of Faculdade de Ciências Agronômicas (FCA) da Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), campus Botucatu, SP where six species of Pinus are distributed in blocks of 100 trees. Resin beads were observed on the trunks and stems of Pinus species. In post-flight evaluation it was reported that 8.77% of P. taeda trees showed symptoms of oviposition by S. noctilio. A female S. noctilio was found performing oviposition. Sirex noctilio is present in Botucatu, increasing the geographical distribution of the pest in São Paulo State.摘要：松树干蜂（Sirex noctilio Fabricius）（膜翅目（Hymenoptera）：树蜂科（Siricidae））是南美洲松树人工林的主要害虫之一。本研究旨在报道松树干蜂在巴西圣保罗州博图卡图的火炬松（Pinus taeda）上的发生情况。调查于圣保罗州立大学“胡利奥·德梅斯基塔·菲略”分校（UNESP）博图卡图校区农业科学学院（Faculdade de Ciências Agronômicas，缩写FCA）树木园内开展，园内以100株为一个种植小区种植了6种松树。在供试松树的树干与枝条上观察到树脂珠。经成虫活动后调查显示，8.77%的火炬松植株表现出松树干蜂产卵为害的症状。同时发现一头雌性松树干蜂正在产卵。此次发现证实松树干蜂已在博图卡图定殖，扩大了该害虫在圣保罗州的地理分布范围。