Tomato spotted wilt tospovirus (TSWV) is a major economic threat to tobacco production in Georgia. Several thrips species are reported as vectors of TSWV, and three of these species are observed on Georgia tobacco, Frankliniella fusca (Hinds), F. occidentalis (Pergande), and F. bispinosa (Morgan). This study evaluated several thrips control practices for efficacy and suppressing the incidence o...

Effects of a juvenile hormone analog, pyriproxyfen, on various developmental stadia of the onion thrips, Thrips tabaci Lindeman, were determined on cabbage leaves in the laboratory. Pyriproxyfen was applied at 0.064 or 0.128 g AI liter(-1) on leaves (residual contact-ingestion), thrips (direct contact) and leaf-thrips (residue contact-ingestion-direct contact). Pyriproxyfen did not have any sig...

The main purpose of this study was to reveal if the UV-A, and visible light reflection of leaves of white cabbage varieties is correlated to resistance against onion thrips. The antixenotic resistance (AR) against onion thrips and thrips damage differed between varieties Balashi, Bloktor, Riana - considered resistant - and Green Gem, Hurricane, Quisor - considered susceptible. The solar UV-A (3...

Screening of lactic acid bacteria (LAB) from Tunisian raw bovine milk has resulted in the isolation of an Enterococcus italicus strain designated as GGN10, which has demonstrated a bacteriocin-like activity against Listeria spp. Antibacterial activity in the culture supernatant was lost after treatment with proteolytic enzymes, whereas it was stable over a wide range of pH (2–10). The treatment...

Although thrips are globally important crop pests and vectors of viral disease, species identifications are difficult because of their small size and inconspicuous morphological differences. Sequence variation in the mitochondrial COI-5' (DNA barcode) region has proven effective for the identification of species in many groups of insect pests. We analyzed barcode sequence variation among 471 th...

Th e interactions between parasites and their hosts can cause profound changes in host behavior, including changes that can alter other trophic interactions. Th e western fl ower thrips Frankliniella occidentalis is an important omnivorous insect vector of Tomato spotted wilt virus (TSWV), which infects crops worldwide and also infects its thrips vector. Here, we show that tospovirus-infected f...

Adult vial technique (AVt) and spray table bioassays were conducted to evaluate toxicity of selected insecticides against immature and adult thrips, Frankliniella spp. (thysanoptera: thripidae). In AVt, technical insecticides comprised of organophosphates (dicrotophos and methamidophos), spinosyn (spinosad) and neonicotinoids (thiamethoxam and imidacloprid) were used. the LC50 values for contac...

In a 2-yr study, the impacts of different plastic soil mulches, insecticides, and predator releases on Frankliniella thrips and their natural enemies were investigated in field-grown peppers. Ultraviolet light (UV)-reflective mulch significantly reduced early season abundance of adult thrips compared with standard black plastic mulch. This difference diminished as the growing seasons progressed...