DINÂMICA POPULACIONAL DE TRIPES EM ERVILHA CULTIVADA NO SEGUNDO MAIOR BIOMA DO BRASIL

Abstract

Research investigating the presence of thrips in pea plants (Pisum sativum) is essential, as these insects act as virus vectors, such as the species Frankliniella schultzei, which transmits the TSWV (Tomato Spotted Wilt Virus), responsible for the brown pod disease in peas. Moreover, these studies contribute to a better understanding of the population dynamics of thrips in crops that precede and follow pea production, providing valuable information for field decision-making. The objective of this study was to evaluate the thrips population, considering species diversity and abundance, in peas during the 2022 season. Yellow sticky traps were used to sample the thrips. Each experimental unit of 2 hectares received one sticky trap positioned above the upper third of the leaves. The total area evaluated was 10 hectares, with collections carried out at 15, 30, 45, 60, 75, and 90 days after planting (DAP) the peas. The samples identified one family (Thripidae), three genera, and four species: Frankliniella schultzei, Frankliniella brevicaulis, Caliothrips phaseoli, and Arorathrips mexicanus, in that order of abundance. At 30 days after planting, no thrips species showed significant dominance over the others. At 45 DAP, at the beginning of plant flowering, the species Frankliniella schultzei and Frankliniella brevicaulis demonstrated clear population peaks compared to the others. The results are discussed in terms of phytosanitary concerns for this group of insects, which are common in various crops important to Brazilian agriculture, including peas.