Orius laevigatus (Insecta; Heteroptera) local strain, a promising agent in biological control of Frankliniella occidentalis (Insecta; Thysanoptra) in protected pepper crops in Tunisia

Elimem, Mohamed; Harbi, Ahlem; Limem-Sellemi, Essia; Othmen, Soukaina Ben; Chermiti, Brahim

doi:10.1007/s41207-017-0040-y

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Fourteen releases were carried out during the season starting from September 2016 to March 2017. The released bioagents in the biological control greenhouse (BCG) were the predators: O. albidipennis, at the rate of 4 nymphs/4 m 2 against T. urticae and F. occidentalis (releasing rate of O. albidipennis to control T. urticae and F. occidentalis was chosen according to El Arnaouty et al Elimem et al 2018). For M. cali ginosus, it was at the rate of 2 nymphs/2 m 2 against B. tabaci (releasing rate of M. caliginosus was chosen according to Bonato et al 2006), C. carnea at the rate of 4 larvae/4 m 2 (releasing rate of C. carnea was chosen according to El Arnaouty 1991), and the egg parasitoid T. euproctidis against S. exigua (for experimental release of T. euproctidis, a total of 2500 parasitoids were released biweekly in BCG).…”

Section: Methodsmentioning

confidence: 99%

Comparative study between biological and chemical control programs of certain sweet pepper pests in greenhouses

Arnaouty

El‐Heneidy

Afifi

et al. 2020

Egypt J Biol Pest Control

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Sweet pepper is an important vegetable crop in Egypt. It is cultivated for local consumption and exportation. The crop is attacked by a large number of pest species such as Western flower thrips, Frankliniella occidentalis (Pergande), whitefly, Bemisia tabaci (Genn.), the two-spotted spider mite, Tetranychu surticae Koch, and the beet armyworm, Spodoptera exigua (Hubner). The present study was conducted on the sweet pepper cultivated in greenhouses, during the winter plantation 2016/17 in a commercial farm located at Berkash district, Giza Governorate, Egypt. Three control programs were practiced: the first used biological control agents (BC), the predators, Orius albidipennis (Reuter), Macrolophus caliginosus (Wagner), Chrysoperla carnea (Steph.), and the egg parasitoid, Trichogramma euproctidis (Girault); the second was sprayed by the recommended chemical control program of the farm (CC); and the third was untreated as a control. Obtained results revealed that the BC program was the most significant one for controlling the complex of sweet pepper pests. Also, applying the BC program resulted to a high yield of sweet pepper production (35.06% increasing than the control).

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Section: Methodsmentioning

confidence: 99%

Comparative study between biological and chemical control programs of certain sweet pepper pests in greenhouses

Arnaouty

El‐Heneidy

Afifi

et al. 2020

Egypt J Biol Pest Control

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“…Phytoseiid mites and predatory bugs, such as Orius spp., were not detected on onion leaves, except for mites detected in the last part of 2020. Although these predators have been recognized as biological control agents of thrips (Gill et al 2015, Elimem et al 2018, Woldemelak 2020, Sekine et al 2021, they were not associated with the suppression of thrips in this system. Small numbers of green lacewings and ladybirds were also detected on onion plants.…”

Section: Other Predatorsmentioning

confidence: 90%

Predacious Natural Enemies Associated With Suppression of Onion Thrips, Thrips tabaci (Thysanoptera: Thripidae), in Intercropped Onion-Barley Agroecosystems

Uesugi

Konishi-Furihata

Tabuchi

et al. 2023

Environmental Entomology

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The effects of two possible factors, prevention of pest immigration and enhancement of natural enemies, in suppressing onion thrips, Thrips tabaci L., were estimated in a small-scale experimental system of spring-planted onions intercropped with barley. The population dynamics of the thrips and their potential predatory natural enemies were investigated in four treatments: control (bare ground), insect net barrier, and onion-barley intercropping with or without trimming. We found that intercropping significantly suppressed onion thrips. It is unlikely that this effect was due to the prevention of thrip immigration because they seemed to move over the camouflage and/or physical barriers of the barley and the net barrier surrounding the onions easily. Intercropping with barley significantly increased hoverfly (Syrphidae) larvae numbers on onion leaves, and that of some groups of ground-dwelling predators such as large carnivorous ground beetles (Carabidae), ants (Formicidae), and wolf spiders (Lycosidae). We conclude that the suppression of thrips in this system was associated with the enhancement of hoverfly larvae abundance, mainly Sphaerophoria macrogaster (Thomson) (Syrphidae: Diptera) because they were observed together with thrips on onions and have been reported to predate thrips as well as aphids. Some hoverfly larvae on barley might move to nearby onions to search for new food sources and attack thrips.

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“…Frankliniella occidentalis (Pergande), a representative species of the order Thysanoptera, is a widespread and highly invasive insect pest that causes severe damge on pepper, tomato, lettuce, strawberry, and other horticultural crops. [30][31][32][33][34][35][36][37] More seriously, F. occidentalis is the most efficient vector for transmitting the tomato spotted wilt orthotospovirus, ranking second on the list of top 10 plant viruses. 38 Therefore, effective prevention and control of F. occidentalis and the viral pathogens they transmit is of great concern.…”

Section: Introductionmentioning

confidence: 99%

Identification and RNAi‐based function analysis of trehalase family genes in Frankliniella occidentalis (Pergande)

Zheng,

Yuan,

Qian

et al. 2024

Pest Management Science

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BACKGROUNDInsects utilize trehalases (TREs) to regulate energy metabolism and chitin biosynthesis, which are essential for their growth, development, and reproduction. TREs can therefore be used as potential targets for future insecticide development. However, the roles of TREs in Frankliniella occidentalis (Pergande), a serious widespread agricultural pest, remain unclear.RESULTSThree TRE genes were identified in F. occidentalis and cloned, and their functions were then investigated via feeding RNA interference (RNAi) and virus‐induced gene silencing (VIGS) assays. The results showed that silencing FoTRE1‐1 or FoTRE1‐2 significantly decreased expression levels of FoGFAT, FoPGM, FoUAP, and FoCHS, which are members of the chitin biosynthesis pathway. Silencing FoTRE1‐1 or FoTRE2 significantly down‐regulated FoPFK and FoPK, which are members of the energy metabolism pathway. These changes resulted in 2‐fold decreases in glucose and glycogen content, 2‐fold increases in trehalose content, and 1.5‐ to 2.0‐fold decreases in chitinase activity. Furthermore, knocking down FoTRE1‐1 or FoTRE1‐2 resulted in deformed nymphs and pupae as a result of hindered molting. The VIGS assay for the three FoTREs revealed that FoTRE1‐1 or FoTRE2 caused shortened ovarioles, and reduced egg‐laying and hatching rates.CONCLUSIONThe results suggest that FoTRE1‐1 and FoTRE1‐2 play important roles in the growth and development of F. occidentalis, while FoTRE1‐1 and FoTRE2 are essential for its reproduction. These three genes could be candidate targets for RNAi‐based management and control of this destructive agricultural pest. © 2024 Society of Chemical Industry.

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Orius laevigatus (Insecta; Heteroptera) local strain, a promising agent in biological control of Frankliniella occidentalis (Insecta; Thysanoptra) in protected pepper crops in Tunisia

Cited by 8 publications

References 6 publications

Comparative study between biological and chemical control programs of certain sweet pepper pests in greenhouses

Comparative study between biological and chemical control programs of certain sweet pepper pests in greenhouses

Predacious Natural Enemies Associated With Suppression of Onion Thrips, Thrips tabaci (Thysanoptera: Thripidae), in Intercropped Onion-Barley Agroecosystems

Identification and RNAi‐based function analysis of trehalase family genes in Frankliniella occidentalis (Pergande)

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