Lethal and sublethal effects of synthetic and bio-insecticides on Trichogramma brassicae parasitizing Tuta absoluta

PLoS ONE, Journal Year: 2021, Volume and Issue: 16(7), P. e0243334 - e0243334

Published: July 30, 2021

The tomato leaf miner (TLM), Tuta absoluta (Meyrick), is an invasive pest found worldwide. Sustainable control strategies aimed at increasing biological approaches and decreasing chemical inputs are required, due to the tendency develop insecticide resistance. In this study, lethal sublethal effects of four insecticides (abamectin, indoxacarb, chlorantraniliprole, spinosad) entomopathogenic fungus Metarhizium anisopliae (Metschnikoff) on a widespread TLM egg parasitoid, Trichogramma brassicae Bezdenko, were estimated. Concentration mortality response bioassays enabled estimation concentrations tested for parasitoids, with chlorantraniliprole having lowest LC50 indoxacarb highest. LC25 sprayed eggs then offered three time intervals parasitoids. fertility other life table parameters individuals emerging from treated All insecticides, but not fungus, had harmful T. brassicae. applications caused 3.84-5.17 times reduction in net reproductive rate (R0) compared control. No affected by spraying 0h treatment, recorded 24 and/or 48h, except gross reproduction (GRR). value intrinsic increase (rm) also decreased 0.528-0.617 after treatments. doubling (DT) increased all treatments Nevertheless, generation (T) was only very slightly affected. addition, combination experiments, M. showed remarkable synergism controlling eggs. These results indicate that low levels key agents should be considered choice included sustainable packages.

Language: Английский

---

Role of tomato plant-derived food sources on Dolichogenidea gelechiidivoris, parasitic wasp of Tuta absoluta

Biological Control, Journal Year: 2025, Volume and Issue: unknown, P. 105719 - 105719

Published: Feb. 1, 2025

Language: Английский

---

An overview of sustainable management strategies for Tuta absoluta

International Journal of Pest Management, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 24

Published: Feb. 4, 2025

Language: Английский

---

Impact of host switching at different larval instars on the performance of the polyphagous pest Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 28, 2025

Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is a highly adaptable and destructive pest of tomato crops, posing significant threat to global agriculture due its rapid spread resistance control measures. This study investigates the developmental rates population parameters T. larvae when transferred between three host plants—tomato, eggplant, tobacco—across four distinct larval instars. Larvae were reared under controlled environmental conditions (25 ± 1 °C, 60 5% RH, 16L:8D photoperiod) these hosts at first fourth Life table analyses, including such as net reproductive rate (R₀) intrinsic increase (r), used evaluate times, survival, potential across different hosts. The results showed that could complete life cycle on all plants, although tobacco significantly prolonged periods, likely high nicotine content, making it less suitable host. In contrast, supported most optimal development, while third-instar eggplant exhibited higher performance than those solely tomato. These findings suggest shows increased adaptability later stages. highlights pest's ability exploit hosts, particularly from third instar onward, underscores importance selection in shaping management strategies. have implications for integrated (IPM) approaches, emphasizing targeted interventions based plant suitability stage.

Language: Английский

---

Host stage preference and performance of Dolichogenidea gelechiidivoris (Hymenoptera: Braconidae), a candidate for classical biological control of Tuta absoluta in Africa

Biological Control, Journal Year: 2020, Volume and Issue: 144, P. 104215 - 104215

Published: Feb. 1, 2020

Language: Английский

---

Insight into the host-specificity of a native and a newly introduced parasitoid of Tuta absoluta and prospect for biological control

Biological Control, Journal Year: 2024, Volume and Issue: 191, P. 105464 - 105464

Published: Feb. 16, 2024

New strategies are urgently needed to control Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), one of the most destructive pests tomato crops. Originating from South America, it is spreading rapidly and has evolved resistance common insecticides making highly challenging control. Regarding biological control, parasitoid Necremnus tutae Ribes & Bernardo (Hymenoptera: Eulophidae) widely present around Mediterranean basin adapted invader playing a substantial role in its In addition, neotropical Dolichogenidea gelechiidivoris Marsh Braconidae) established accidentally following host Spain Algeria classical program using this species ongoing Sub-Saharan Africa. Understanding trophic connections between D. gelechiidivoris, N. tutae, targeted T. potential non-target hosts essential assess their value as augmentative or agents promote establishment conservation biocontrol. We conducted host-specificity tests laboratory four European leafminer evaluate specificity these two parasitoids absoluta. then assessed affinity for by exposing sentinel plants with alternative Phthorimaea operculella (Zeller) Gelechiidae) inside greenhouses measuring each species' field parasitism rate. Our results show that tested laboratory, attacked three, while only P. operculella. greenhouse, did not prefer absoluta, whereas preferred latter. The mean rate over three months monitoring period reached 27 % 35 gelechiidivoris. discuss importance understanding effects natural enemy can have

Language: Английский

---

Special issue on Tuta absoluta: recent advances in management methods against the background of an ongoing worldwide invasion

Journal of Pest Science, Journal Year: 2019, Volume and Issue: 92(4), P. 1313 - 1315

Published: June 19, 2019

Language: Английский

---

Natural enemies associated with Tuta absoluta and functional biodiversity in vegetable crops

BioControl, Journal Year: 2021, Volume and Issue: 66(5), P. 613 - 623

Published: June 18, 2021

Language: Английский

---

Identification, Microhabitat, and Ecological Niche Prediction of Two Promising Native Parasitoids of Tuta absoluta in Kenya

Insects, Journal Year: 2022, Volume and Issue: 13(6), P. 496 - 496

Published: May 25, 2022

Associations between the South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), and its native parasitoids need to be updated increase implementation of pest control strategies. In this study, T. absoluta-infested plants were collected from three regions in Kenya. The emerged identified, their abundance was correlated with agroecological parameters, viz. cropping systems, predator Nesidiocoris tenuis Reuter (Hemiptera: Miridae). study further conducted a habitat suitability prediction for identified parasitoids. Two parasitoid species, Bracon nigricans (Szépligeti) (Hymenoptera: Braconidae) Stenomesius sp. near japonicus (Ashmead) Eulophidae) immature stages, parasitism rates ranging 0 21% 17% respectively. Insecticide application open field negatively influenced by S. nr japonicus. Low occurrence N. positively affected B. parasitism. predicted species indicated vast suitable areas sub-Saharan Africa, Australia, America. observed Africa. Therefore, parasitoids, especially could considered as biocontrol agent Integrated Pest Management program absoluta.

Language: Английский

---

Few indirect effects of baculovirus on parasitoids demonstrate high compatibility of biocontrol methods against Tuta absoluta

Pest Management Science, Journal Year: 2022, Volume and Issue: 79(4), P. 1431 - 1441

Published: Dec. 8, 2022

Combining different biocontrol agents, particularly micro- and macroorganisms, can contribute to new sustainable pest control approaches. Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is one of the most destructive pests solanaceous crops. An emerging management strategy consists biological using microbial insecticides such as baculoviruses, but with limited efficacy. Thanks their high target specificity, baculoviruses be used simultaneously natural enemies parasitoids for improved T. absoluta. However, potential indirect nontarget effects on result from overlapping resource requirements. We assessed whether ovipositing parasitoid females discriminated against virus-treated hosts examined outcome within-host competition between hymenopteran Necremnus tutae (Reuter) (Eulophidae) Dolichogenidea gelechiidivoris Marsch (Braconidae), Phthorimaea operculella granulovirus (PhopGV, Baculoviridae) that infects larvae.Female D. hosts, whereas N. did not. found few virus-related depending species, sex, time virus treatment. Effects were ambivalent offspring ranged increased male longevity when infection occurred before parasitization reduced emergence after parasitization. showed a longer development shorter they developed in hosts.The had low impact offspring. In rare cases, adverse detected; however, magnitude these unlikely reduce fitness offspring, therefore both seem compatible baculovirus © 2022 The Authors. Pest Management Science published by John Wiley & Sons Ltd behalf Society Chemical Industry.

Language: Английский

---