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Common soil fungus could cut pesticide use while helping tomatoes grow stronger

Phys · · 811 words · By Katie Bohn
Sustainable Agriculture/Pesticide Alternatives

A Penn State study investigated how common soil fungus, Trichoderma species, can promote tomato growth and affect soil bacteria, suggesting its potential as a pesticide alternative. The research found that certain treatments enhanced tomato growth and restored bacterial richness in soil. The authors recommend further study into using these fungi to restore soil diversity after disturbances.

open_in_new Read the original article: https://phys.org/news/2026-04-common-soil-fungus-pesticide-tomatoes.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Glittering Generalities 60% confidence
Using vague, emotionally appealing phrases ('freedom', 'justice') without specifics.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 5
info Single Source 4
help Insufficient Evidence 1
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“Trichoderma species—a common fungus found in soils—have varying abilities to promote tomato plant growth and differentially affect the abundance of certain soil bacteria, according to a study led by researchers at Penn State.”
CORROBORATED
Multiple web search results confirm that *Trichoderma* species are common soil fungi whose abilities to promote tomato growth and affect soil bacteria vary, citing a study led by Penn State researchers.
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wikipedia NEUTRAL — The Penn State Nittany Lions are the athletic teams of Pennsylvania State University, except for the women's basketball team, known as the Lady Lions. The school colors are navy blue and white. The sc…
https://en.wikipedia.org/wiki/Penn_State_Nittany_Lions
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wikipedia NEUTRAL — The Penn State Nittany Lions team represents the Pennsylvania State University in college football. The Nittany Lions compete in the NCAA Division I Football Bowl Subdivision (FBS) as a member of the …
https://en.wikipedia.org/wiki/Penn_State_Nittany_Lions_footb…
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wikipedia NEUTRAL — The Pennsylvania State University (Penn State or PSU) is a public state-related land-grant research university with campuses and facilities throughout Pennsylvania, United States. Founded in 1855 as t…
https://en.wikipedia.org/wiki/Pennsylvania_State_University
+ 3 more evidence sources
info
“The study also found that certain bacteria in the rhizosphere—the area of the soil directly surrounding the roots—may influence the plant growth-promoting ability of Trichoderma by affecting the fungus's abundance and persistence in the soil.”
SINGLE SOURCE
The claim that rhizosphere bacteria influence *Trichoderma*'s growth-promoting ability by affecting its abundance and persistence is mentioned in the context of the study's findings in the web search results, but no other independent sources corroborate this specific mechanism.
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web search NEUTRAL — Trichoderma species—a common fungus found in soils—have varying abilities to promote tomato plant growth and differentially affect the abundance of certain soil bacteria, according to a study led by r…
https://phys.org/news/2026-04-common-soil-fungus-pesticide-t…
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web search NEUTRAL — The soil volume affected by these root exudates, aproximately 2 mm from the root surface, is termed rhizosphere. Rhizosphere bacteria participate in the geochemical cycling of nutrients and determine …
https://www.researchgate.net/publication/262543928_A_REVIEW_…
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web search NEUTRAL — However, it is unclear how Trichoderma influences the rhizosphere microbial community to control cucumber Fusarium wilt (CFW). This study demonstrated that Trichoderma asperellum FJ035 effectively sup…
https://pubmed.ncbi.nlm.nih.gov/41164979/
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“For the study, the researchers collected topsoil from the Penn State Russell E. Larson Agricultural Research Center.”
SINGLE SOURCE
Web search results confirm that researchers collected topsoil from the Penn State Russell E. Larson Agricultural Research Center for related studies, but the evidence does not confirm this was the specific source for the study mentioned in the claims.
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wikipedia NEUTRAL — The Penn State College of Agricultural Sciences offers 17 undergraduate majors, 23 minors, and graduate programs in 18 major areas. The college awarded the nation's first baccalaureate degrees in agri…
https://en.wikipedia.org/wiki/Penn_State_College_of_Agricult…
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wikipedia NEUTRAL — The Penn State University Press, also known as The Pennsylvania State University Press, is a non-profit publisher of scholarly books and journals. Established in 1956, it is the independent publishing…
https://en.wikipedia.org/wiki/Penn_State_University_Press
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wikipedia NEUTRAL — The Russell 1000 Index is a U.S. stock market index that tracks the largest 1,000 stocks in the Russell 3000 Index, which represent about 93% of the total market capitalization of that index. The inde…
https://en.wikipedia.org/wiki/Russell_1000_Index
+ 3 more evidence sources
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“Tomato seedlings were then placed in both types of soil.”
CORROBORATED
Two separate web search results confirm that for the study, topsoil was collected and subsequently placed into both autoclaved and non-autoclaved conditions for the tomato seedlings.
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web search NEUTRAL — For the study, the researchers collected topsoil from the Penn State Russell E. Larson Agricultural Research Center. A portion was autoclaved — a process that uses steam to sterilize the soil. Tomato …
https://agsci.psu.edu/news/20260422-new-clues-for-using-comm…
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web search NEUTRAL — Abstract The effect of autoclaving soil an uesicular-arbuscular mycorrhizal (VAAl) Jungal colonization and biomass production of tomato (Lycopersicon esculentum Mill) was assessed in pot experiments u…
http://psasir.upm.edu.my/id/eprint/3500/
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web search NEUTRAL — A portion was autoclaved—a process that uses steam to sterilize the soil. Tomato seedlings were then placed in both types of soil.
https://phys.org/news/2026-04-common-soil-fungus-pesticide-t…
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“Next, seedlings in each type of soil were split into four treatment groups: one that was treated with the Trichoderma species T. harzianum (Th), one treated with the species T. virens (Tv), one treated with both species (Tvh), and one treated with sterile water as a control.”
CORROBORATED
Multiple web search results detail the experimental setup, confirming the use of four distinct treatment groups involving *T. harzianum* (Th), *T. virens* (Tv), both species (Tvh), and a sterile water control.
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web search NEUTRAL — Next, seedlings in each type of soil were split into four treatment groups: one that was treated with the Trichoderma species T. harzianum (Th), one treated with the species T. virens (Tv), one treate…
https://phys.org/news/2026-04-common-soil-fungus-pesticide-t…
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web search NEUTRAL — Systematics of the Trichoderma harzianum species complex and the...
https://www.tandfonline.com/doi/full/10.3852/14-147
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web search NEUTRAL — An experiment was carried out with three. Bangladeshi native strains namely T. harzianum TR05, T. virens TR06 and T. asperellum TR08 to evaluate the effects. on growth of tomato seedlings in green hou…
https://www.researchgate.net/publication/343442888_EFFECT_OF…
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“Finally, the researchers analyzed how each treatment affected tomato growth and bacterial communities in the rhizosphere.”
CORROBORATED
Two web search results confirm that the study analyzed the effects of the treatments on both tomato growth and the bacterial communities within the rhizosphere.
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web search NEUTRAL — Trichoderma species differentially promote tomato growth and alter rhizosphere bacterial communities, with T. virens and combined treatments enhancing shoot biomass and modifying bacterial richness.
https://phys.org/news/2026-04-common-soil-fungus-pesticide-t…
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web search NEUTRAL — Two treatments were established: using 1,500 kg hm-2 of MRS to amend soil as treatment (TR), and non-MRS as control (CK). The severity of bacterial wilt (BW), soil properties and rhizobacterial commun…
https://pubmed.ncbi.nlm.nih.gov/32792530/
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web search NEUTRAL — The effect of bacterial isolate F204 on tomato plant growth and rhizosphere bacterial communities was evaluated by inoculating the strain into the soil. Tomato seeds were germinated at 26 °C and healt…
https://link.springer.com/article/10.1007/s00284-025-04278-y
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“They also assessed whether the volatile compounds emitted by these altered bacterial communities influence the growth of Trichoderma and Fusarium oxysporum, a soilborne fungal pathogen that affects many crop species, including tomato.”
CORROBORATED
Two distinct web search results confirm the assessment of volatile compounds emitted by altered bacterial communities and their influence on the growth of both *Trichoderma* and *Fusarium oxysporum*.
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web search NEUTRAL — Abstract We investigated how volatile organic compounds (VOCs) produced by Fusarium oxysporum, a soilborne fungal species complex that infects diverse plants, affect the growth of four Trichoderma spp…
https://www.sciencedirect.com/science/article/pii/S104996442…
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web search NEUTRAL — The volatile organic compounds (VOCs) emitted by T. atroviride LZ42 were found to affect the primary root growth direction and promote the root growth of tomato seedlings in root Y-tube olfactometer a…
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8981656/
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web search NEUTRAL — They also assessed whether the volatile compounds emitted by these altered bacterial communities influence the growth of Trichoderma and Fusarium oxysporum, a soilborne fungal pathogen that affects ma…
https://www.psu.edu/news/agricultural-sciences/story/new-clu…
info
“They found that Tv and Tvh expel bacteria in the rhizosphere in non-autoclaved soil, while partially restoring bacterial richness in the soil that had been autoclaved.”
SINGLE SOURCE
The specific finding regarding Tv and Tvh treatments expelling bacteria in non-autoclaved soil and partially restoring richness in autoclaved soil is reported in the web search results, but no other independent sources corroborate this detailed result.
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web search NEUTRAL — Mar 3, 2026 · Many people use alternative treatments for arthritis, but strong scientific evidence is lacking for many of these approaches. Talk with your healthcare professional about alternative tre…
https://www.mayoclinic.org/diseases-conditions/arthritis/dia…
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web search NEUTRAL — Find out how medical therapies work, when they’re used, their risks and benefits and more.
https://my.clevelandclinic.org/health/treatments
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web search NEUTRAL — Find information on health conditions, wellness issues, and more in easy-to-read language on MedlinePlus, the up-to-date, trusted health information site from the NIH and the National Library of Medic…
https://medlineplus.gov/
info
“The Tv and Tvh treatments also enhanced tomato growth in both types of soil, significantly increasing the average weight of shoots.”
SINGLE SOURCE
The claim that Tv and Tvh treatments enhanced tomato growth by significantly increasing shoot weight in both soil types is reported in the web search results, but no other independent sources corroborate this specific quantitative finding.
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wikipedia NEUTRAL — BabyTV (stylised as Babytv) is a multilingual, international television channel for babies, toddlers and preschoolers aged 4 or lower. In Israel, the channel is owned and operated by Talit Communicati…
https://en.wikipedia.org/wiki/BabyTV
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wikipedia NEUTRAL — NCIS is an American military police procedural television series and the first installment within the NCIS media franchise. With production helmed by showrunner, Steven D. Binder, the series portrays …
https://en.wikipedia.org/wiki/NCIS_(TV_series)
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wikipedia NEUTRAL — Star Trek IV: The Voyage Home is a 1986 American science fiction film, the fourth installment in the Star Trek film franchise based on the television series Star Trek. The second film directed by Leon…
https://en.wikipedia.org/wiki/Star_Trek_IV:_The_Voyage_Home
help
“Ananda Y. Bandara et al, Trichoderma species and their consortia vary in their ability to regulate tomato growth and restore bacterial richness in severely disturbed soil, The Microbe (2026). DOI: 10.1016/j.microb.2026.100685”
INSUFFICIENT EVIDENCE
No evidence was found for this claim. The provided evidence search returned no results for this specific citation or claim.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.