Ácaros encontrados sôbre maçãs de procedência argentina

Abstract

INTRODUÇÃOVarias sao as pragas que foram introduzidas no nosso meio, principalmente por meio de material vegetal infestado. Em junho de 1967 tivemos a oportunidade de observar um lote de maças de procedencia da Argentina e que se apresentava bastante infestado por ãcaros. MATERIAL E MÉTODOSAs maças foram adquiridas em casa comercial de Piracicaba, Estado de Sao Paulo, que as mantinha refrigeradas. 0 ma terial foi coletado de duas regiões das frutas, como segue. Na região da inserção do

South American Spider Mites: New Hosts and Localities

“…Despite reports of P. ulmi on apple trees as early as 1967 ( Flechtmann, 1976a ), grape vines in Brazil were not affected, in contrast to the damages the P. ulmi caused to vineyards in Europe. Navia et al ( 1998 ) hypothesized that the mites that attacked grape vines in Europe had different biotypes than those that infested apple trees.…”

“…Panonychus ulmi was first reported in Brazil by Flechtmann ( 1967a ), who discovered them on apples imported from Argentina. Soon after, Bleicher ( 1974 ) reported their presence on apple trees ( Malus domestica L.) growing in orchards in the south of the country.…”

“…Among the early findings was the report of Tetranychus gloveri Banks 1900 and the description of Mononychellus tanajoa ( Bondar 1938 ) based on specimens collected in Brazil by G Bondar, a Russian researcher living in the state of Bahia ( Bondar 1930 , 1938 ). In the 1960s numerous contributions were made by pioneers in agricultural mite studies in Brazil, such as CHW Flechtmann ( Flechtmann 1967 , 1967a , 1967b , 1972 , 1975 , 1976 ; Flechtmann and Baker 1970 , 1975 ) and AD Paschoal (Paschoal 1970, 1970a ), followed by RJF Feres in subsequent decades ( Feres 1986 , 1992 ; Feres and Flechtmann 1986 , 1986a , 1988 , 1995 , 1995a , 1995b ). From that time forward these and other researchers have conducted major studies on tetranychids in several fields such as taxonomy, ecology, biology, control, and resistance, bringing important advances to knowledge of Brazilian tetranychids.…”

Feeding Preference and Biological Traits of Panonychus Ulmi on Leaves of Apple and Grapevine

“…In the present study, P. ulmi showed preference for apple leaves through the biological indices evaluated in the experiments, corroborating our first hypothesis. Native of Europe, P. ulmi is widely distributed worldwide (Jeppson et al 1975, Van Leeuwen et al 2015, but the first record on grapevines in Brazil occurred about 40 years later (Ferla & Botton 2008) than the first record in apple orchards (Flechtmann 1967, Bleicher 1974. Therefore, the preference for apple as host might be explained by the fact that this mite species is more adapted to this plant than to the different grapevine varieties.…”

“…Panonychus ulmi reaches the level of economic damage in apple worldwide (Yin et al 2013). In Brazil, the first record of P. ulmi occurred in apples from Argentina (Flechtmann 1967) and in 1972, Bleicher (1974 observed a large infestation in an apple orchard in Fraiburgo, Santa Catarina. The first record in grapevine in Brazil was carried out by Ferla and Botton (2008), in the Merlot variety in Bento Gonçalves, Serra Gaúcha, Rio Grande do Sul, in the 2005-2006harvest.…”