Injuries caused by frankliniella spp. (thysanoptera: thripidae) on seedless grapes

Abstract

Thrips of the genus Frankliniella cause significant reduction on grape production. Little is known about its decision making approach in integrated pest management and information on thrips injuries to the vine is scarce, hindering the control of this pest. This study aimed to determine the species of thrips and injuries that cause damage to berries in seedless grapes clusters. The trial was conducted in an area cultivated with Vitis vinifera L., variety Thompson Seedless, using a randomized block design with five treatments and four replications. The treatments consisted of artificial infestation (zero, two, four and eight thrips per inflorescence), and treatment determined by the monitoring system of the grower. Each replication consisted of three plants with 10 inflorescences, which were artificially infested with thrips and covered with nonwoven fabric bags. During the cluster thinning, pre-harvest cleaning and harvest, the numbers of injuried berries and the berries with injuries were evaluated. The thrips species identified were: Frankliniella schultzei (Trybom), Frankliniella brevicaulis Hood, Frankliniella gemina Bagnall, Frankliniella gardeniae Moulton, and Frankliniella sp. A positive and significant correlation was observed between the number of injuries per fruit and the level of thrips infestation, obtained by the equation y = 2.55 + 48.54x (F= 59.98; P= 0.0001; r 2 = 0.51). The results suggest that the presence of a whitish halo around a small scar on fruit is associated with the presence of adult Frankliniella spp. Index terms:Vitis vinifera, thrips, integrated pest management, infestation level, damages. RESUMOOs tripes do gênero Frankliniella ocasionam perdas consideráveis à produção da videira. Informações sobre os danos ocasionados por esses insetos e a tomada de decisão em programas de manejo integrado em videira são escassos, dificultando o controle dessa praga. Neste trabalho, objetivou-se determinar as injúrias e as espécies de tripes que ocasionam danos em bagas de uva sem semente. O experimento foi conduzido em área comercial de Vitis vinifera L, cultivar Thompsom Seedless, em blocos ao acaso, com cinco tratamentos e quatro repetições. Os tratamentos foram: 0, 2, 4 e 8 tripes por inflorescência e o nível de controle do produtor determinado pelo monitoramento da área. Cada repetição foi constituída de três plantas com 10 inflorescências cada, as quais foram infestadas com tripes adultos e cobertas com saco de TNT TM (tecido não tecido). Durante o raleio, limpeza pré-colheita e colheita foram avaliados: o número de injúrias nas bagas e o número de bagas com injúrias. As espécies identificadas foram: Frankliniella schultzei (Trybom), Frankliniella brevicaulis Hood, Frankliniella gemina Bagnall, Frankliniella gardeniae Moulton e Frankliniella sp. Obteve-se correlação positiva e significativa entre o número de injúrias nas bagas e o nível de infestação de tripes: (y = 2,55 + 48,54x (F= 59,98; P= 0,0001; r 2 = 0,51). Os resultados sugerem que a presença de um halo esbranquiçado ao redo...

“Strawberry fields forever”: flower-inhabiting thrips (Thysanoptera: Thripidae) communities and their spatial interactions in strawberry agroecosystems in Québec, Canada, with first mention of pest Frankliniella intonsa (Trybom)

“…However, identification delay or lack of local taxonomic updates are frequent issues complicating pest thrips management (Reitz et al 2011; Sabahi et al 2017; Wu et al 2018). Most studies on thrips have primarily focused on economic losses and control of common pest species in crops (Moreira et al 2014; Renkema et al 2018), which represent only approximately 1% of all thrips species (Morse and Hoddle 2006). Consequently, thrips local community composition beyond crop pests, mainly associated with wild host plants near crops, remains neglected.…”

New records of thrips species on mango and natural enemies associated

“…The occurrence of F. gardeniae was reported in citrus, guava, soybean, grape and avocado (HODDLE et al, 2002;CAVALLERI et al, 2006;LIMA et al, 2013a;MOREIRA et., 2014). Haplothrips gowdeyi was recorded in nectarine flower, bean, soybean, fava, rice, coffee and watermelon (HICKEL;DUCROQUET 1998;LIMA et al, 2013b;COSTA et al, 2015).…”

“…Haplothrips gowdeyi was recorded in nectarine flower, bean, soybean, fava, rice, coffee and watermelon (HICKEL;DUCROQUET 1998;LIMA et al, 2013b;COSTA et al, 2015). Frankliniella gemina has already been reported in rose bush, grape and various ornamental plants (MOREIRA et al, 2014). On the other hand, the species F. distinguenda is little reported in the literature.…”