Compatibility of foliage-dwelling predatory mites and mycoinsecticides, and their combined efficacy against western flower thrips Frankliniella occidentalis

Saito, Taro; Brownbridge, Michael

doi:10.1007/s10340-018-0991-z

Cited by 17 publications

(22 citation statements)

References 47 publications

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“…Ideally, vegetables may be produced without the use of chemicals but relying on biological control instead. Several studies have in fact demonstrated the effectiveness of biological control agents against F. occidentalis, including the predator mites Neoseiulus cucumeris, Amblyseius swirskii, Neoseiulus barkeri and Stratiolaelaps scimitus (Wu et al 2016;Saito and Brownbridge 2018), the predatory bugs O. insidiosus and O. laevigatus (Waite et al 2014;Vaello et al 2017) and even more species. Orius sauteri is a native predator of F. occidentalis in China, and high predation rates on F. occidentalis were demonstrated in the present work with a theoretical daily maximum number of 166.7 and a density depending on the feeding on F. occidentalis.…”

Section: Discussionmentioning

confidence: 99%

Improved control of Frankliniella occidentalis on greenhouse pepper through the integration of Orius sauteri and neonicotinoid insecticides

et al. 2020

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Frankliniella occidentalis (Thysanoptera: Thripidae) is a notorious pest of horticultural crops, against which the predator Orius sauteri or neonicotinoid insecticides are commonly used in control programmes. Here, we carried out a series of indoor acute toxicity tests and a risk assessment of eight neonicotinoid insecticides (imidacloprid, nitenpyram, acetamiprid, thiacloprid, thiamethoxam, clothianidin, dinotefuran and flupyradifurone) for O. sauteri and F. occidentalis. For O. sauteri, the LC 50 values of acetamiprid and flupyradifurone were 12.75 and 9.24 mg a.i. L −1 , respectively, and their hazard quotients were ≤ 2. Their toxicities to F. occidentalis were in a similar range. When LC 20 of acetamiprid or flupyradifurone was applied to the pest, predator or both, predation ability was slightly reduced with flupyradifurone (37, 59 and 18, respectively) having less impact compared to acetamiprid (18, 21 and 10, respectively). Furthermore, we performed a greenhouse efficacy trial which involved the selected neonicotinoids acetamiprid and flupyradifurone as well as O. sauteri. Our results showed that integrated pest management, i.e. the application of half the amount of O. sauteri together with low doses (LC 20 ) of acetamiprid or flupyradifurone, significantly reduced the pest with 76% and 75%, respectively, during the trial time, similar to the biocontrol treatment and significantly better than for chemical control alone. The cost of the integrated pest control strategy was similar to chemical control alone and lower than for biocontrol, indicating its potential as an economically feasible thrips control strategy, with reduced environmental risks compared to using chemicals only.

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Section: Discussionmentioning

confidence: 99%

Improved control of Frankliniella occidentalis on greenhouse pepper through the integration of Orius sauteri and neonicotinoid insecticides

et al. 2020

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“…Thus, the management of WFT has become a complex task [2,[7][8][9][10]. Moreover, due to the high toxicity of chemical insecticides, problems with large residual amounts of chemicals and a long residual period in marketable cash crops, contamination of the environment, threats to human health, toxicity to beneficial non-target organisms, species displacement, and destruction of IPM systems [3,[11][12][13][14], finding reliable biological control methods that can protect the ecological environment and control the population of WFT effectively and continuously, as well as being compatible with other components, has become an important area of research for the integrated control of WFT [3,13,15].…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, they have been widely used and studied throughout the world [17]. There are seven species of entomopathogenic fungi which have been successfully applied for the control of WFT, including Lecanicillium lecanii (Zimmermann) [20], Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Ascomycota) [6,[21][22][23][24], Metarhizium anisopliae (Metschnikoff) Sorokin (Hyphomycetes: Deuteromycotina) [3,9,10,12], Metarhizium brunneum (Metschnikoff) Sorokin [25], Metarhizium flavoviride (Gams and Rozsypal) (syn. Metarhizium anisopliae var.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, a potential disadvantage of EPF is their relatively short shelf life, compared to conventional chemical insecticides [6]. Further, when the pest population density is high, it is difficult to control the pest density below an economic threshold with only the use of a single fungal agent [12]. Therefore, combining fungal biocontrol agents with adjuvants and Insects 2020, 11,93 3 of 20 other insecticides with good compatibility is an effective and reliable solution to improve the pest control effect [15,18,32,39,48].…”

Section: Introductionmentioning

confidence: 99%

“…In another study, Wakil et al [32] demonstrated that combining B. bassiana with the neonicotinoid insecticide thiamethoxam and DE led to synergistic effects against Rhyzopertha dominica under laboratory conditions. At present, there are two main strategies for the biological control of WFT: (1) EPF combined with predatory mites [12,13,20,53]; and (2) EPF combined with insecticides [3,6,9,10]. For example, Wu et al [13] demonstrated that the combination of B. bassiana and the predatory mite Neoseiulus barkeri improved WFT control in greenhouse-grown cucumbers; similarly, Jacobson et al [53] showed that the simultaneous use of Amblyseius cucumeris and B. bassiana improved WFT control in cucumbers.…”

Section: Introductionmentioning

confidence: 99%

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The Time–Concentration–Mortality Responses of Western Flower Thrips, Frankliniella occidentalis, to the Synergistic Interaction of Entomopathogenic Fungus Metarhizium flavoviride, Insecticides, and Diatomaceous Earth

Zhang

et al. 2020

Insects

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Western flower thrips (WFT), Frankliniella occidentalis (Pergande), is a highly invasive pest which is harmful to many cash crops globally and resistant to various insecticides. Entomopathogenic fungi (EPF), as biological control agents, have demonstrated a good control effect on WFT. The aim of this study was to evaluate the synergistic and pathogenicity efficacy of the fungal strain Metarhizium flavoviride WSWL51721 when distributed with diatomaceous earth (DE) and the active ingredient imidacloprid using four bioassay methods against adult and second instar larvae of WFT. The data of the four bioassays have been fitted to the time-concentration-mortality (TCM) model. The corrected mortality ranges of WFT adults were 75-100%, 82.69-100%, 78.85-100%, and 92.31-100%, and the corrected mortality ranges of WFT second instar larvae were 72.22-100%, 85.19-100%, 77.77-100%, and 100% in the four bioassays at concentrations of 1.2 × 10 6 to 1.2 × 10 8 conidia/mL, respectively. At 1.2 × 10 8 conidia/mL, assays 2 (M. flavoviride with DE), 3 (M. flavoviride with imidacloprid), and 4 (M. flavoviride with DE and imidacloprid) had the shortest median lethal time (LT 50 ), compared with that of assay 1 (M. flavoviride alone) for adults at 2.26 d, 2.06 d, and 1.53 d, and second instar larvae at 2.45 d, 1.70 d, and 1.41 d, respectively. The median lethal concentration (LC 50 ) in the four bioassays decreased within 3-10 days of inoculation. On the third day, it was found that the lowest median lethal concentrations in assays 2, 3, and 4 were 1.58 × 10 7 , 1.13 × 10 7 , and 3.39 × 10 6 conidia/mL, respectively, which were significantly different from that in assay 1 for the adults. For the second instar larvae, assays 2, 3, and 4 also had the lowest lethal concentrations and were significantly different from those of assay 1. There were significant differences in sporulation between adults and second instar larvae under the four bioassays. Our results indicate that assays 2 (M. flavoviride with DE), 3 (M. flavoviride with imidacloprid), and 4 (M. flavoviride with DE and imidacloprid) demonstrate synergistic effects on the control of both adult and second instar larvae of WFT under laboratory conditions.

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Evaluation of a guardian plant system to suppress Frankliniella occidentalis (Thysanoptera: Thripidae) in greenhouse ornamentals

Sullivan

Davari

Kim

et al. 2023

Pest Management Science

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BACKGROUNDWestern flower thrips (WFT), Franklinella occidentalis (Pergande), is an economically damaging pest of greenhouse ornamentals. A ‘guardian plant system’ (GPS) that targeted WFT was evaluated under controlled and commercial greenhouse conditions. This system used mycotized millet grains with the entomopathogenic fungus Beauveria bassiana (Balsamo‐Crivelli) Vuillemin applied to soil of potted marigolds, Tagetes patula (L.), combined with the foliar‐dwelling predatory mite Neoseiulus (=Amblyseius) cucumeris (Oudemans) in slow‐release sachets under controlled greenhouse conditions, and with the addition of a pheromone lure under commercial settings.RESULTSSignificantly fewer WFT and less foliar damage on GPS was observed over the 10 and 12 weeks experimental periods compared to the untreated controls. Predatory mites were maintained up to 10 weeks with one release under controlled greenhouse conditions and 12 weeks with two releases in commercial greenhouses. In commercial greenhouses, greater numbers of WFT were found on marigolds than on crop plants within 1 m of the system. Fungal granules persisted for 12 weeks up to 2.5 × 105 CFU g−1 in the GPS soil.CONCLUSIONThe use of biological control agents to suppress WFT within a GPS could be a useful IPM strategy for greenhouse production. The marigold GPS attracted WFT which were suppressed primarily through predation by foliar‐dwelling predatory mites and to a lesser extent, infection from conidia produced by the granular fungal formulation in the soil. Further investigations into system deployment and fungal granular application rates and new fungal formulations are suggested to improve system efficacy. © 2023 Society of Chemical Industry.

show abstract

Compatibility of foliage-dwelling predatory mites and mycoinsecticides, and their combined efficacy against western flower thrips Frankliniella occidentalis

Cited by 17 publications

References 47 publications

Improved control of Frankliniella occidentalis on greenhouse pepper through the integration of Orius sauteri and neonicotinoid insecticides

Improved control of Frankliniella occidentalis on greenhouse pepper through the integration of Orius sauteri and neonicotinoid insecticides

The Time–Concentration–Mortality Responses of Western Flower Thrips, Frankliniella occidentalis, to the Synergistic Interaction of Entomopathogenic Fungus Metarhizium flavoviride, Insecticides, and Diatomaceous Earth

Evaluation of a guardian plant system to suppress Frankliniella occidentalis (Thysanoptera: Thripidae) in greenhouse ornamentals

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