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Honeybees may be helping spread tree‑killing myrtle rust—new research

Phys · · 840 words · By Sacchi Shin-Clayton; Jacqueline R Beggs
Agricultural Management Biosecurity Ecological Impact

Researchers suggest that honeybees may act as vectors for the spread of myrtle rust in New Zealand by collecting fungal spores as a food source. The study indicates that spores can remain viable within hives, potentially allowing the disease to be transported long distances via managed hive movements.

open_in_new Read the original article: https://phys.org/news/2026-05-honeybees-treekilling-myrtle-rust.html

analyticsAnalysis

20%
Propaganda Score
confidence: 95%
Minor concerns. Some persuasive language detected, but largely factual.

psychologyDetected Techniques

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.
warning
Appeal to Fear 60% confidence
Building support by instilling anxiety or panic in the audience.

fact_checkFact-Check Results

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

check_circle Corroborated 6
info Single Source 3
verified Verified By Reference 1
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“In pollinating crops and fertilizing fruit, they support more than a third of the food we eat and are worth billions of dollars to New Zealand's economy.”
CORROBORATED
The claim that a third of world food production depends on bees is corroborated by the UNEP and FAO. While the specific dollar value for New Zealand's economy isn't explicitly detailed in the snippets, the general role of bees in food security is widely supported by multiple web sources.
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web search NEUTRAL — The story of bees and global food supply is ultimately a story of connection—between species, ecosystems, and human societies. It is a reminder that the survival of these tiny, winged creatures is int…
https://www.sciencenewstoday.org/the-role-of-bees-in-global-…
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web search NEUTRAL — And pollinators contribute directly to food security. According to bee experts at the Food and Agriculture Organization (FAO) of the United Nations, a third of the world's food production depends on b…
https://www.unep.org/news-and-stories/story/why-bees-are-ess…
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web search NEUTRAL — Discover how honey bees contribute to global food production, and learn about the alarming decline of bee populations and its impact on food security. Find out what actions can be taken to support pol…
https://beekeepercorner.com/bees-and-food-security-contribut…
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“Indigenous to Central and South America, myrtle rust was first detected in New Zealand in 2017.”
CORROBORATED
Multiple independent sources, including The Conversation and the Science Learning Hub, confirm myrtle rust is indigenous to Central and South America and was first detected in New Zealand in 2017.
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wikipedia NEUTRAL — Myrtle Beach International Airport (IATA: MYR, ICAO: KMYR, FAA LID: MYR) is a county-owned, public-use airport. It is located 3 miles (5 km) southwest of the central business district of Myrtle Beach,…
https://en.wikipedia.org/wiki/Myrtle_Beach_International_Air…
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wikipedia NEUTRAL — Luma apiculata, the Chilean myrtle, arrayán or temu, is a species of flowering plant in the myrtle family, native to the central Andes between Chile and Argentina, at 33–45° south latitude. Growing to…
https://en.wikipedia.org/wiki/Luma_apiculata
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wikipedia NEUTRAL — Myrtle Beach is a resort city in Horry County, South Carolina, United States. It is located in the center of a long and continuous 60-mile (97 km) stretch of beach known as the "Grand Strand” in the n…
https://en.wikipedia.org/wiki/Myrtle_Beach,_South_Carolina
+ 4 more evidence sources
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“Since then, it has spread across much of the North Island and into parts of the South Island and the Chatham Islands.”
CORROBORATED
The spread of myrtle rust across the North Island, South Island, and Chatham Islands is confirmed by The Conversation and Manaaki Whenua.
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wikipedia NEUTRAL — The fungi of New Zealand consist of an estimated 22,000 species, of which only 34% are known. There is a high diversity of New Zealand native fungi, with about 1,100 species occurring in association w…
https://en.wikipedia.org/wiki/Fungi_of_New_Zealand
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wikipedia NEUTRAL — Raoul Island (Sunday Island; Māori: Rangitāhua) is the largest and northernmost of the main Kermadec Islands, 900 km (560 mi; 490 nmi) south south-west of 'Ata Island of Tonga and 1,100 km (680 mi; 59…
https://en.wikipedia.org/wiki/Raoul_Island
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wikipedia NEUTRAL — Biosecurity in New Zealand guards against threats to agriculture and biodiversity, with strict border control measures being taken to prevent unwanted organisms from entering the country. New Zealand …
https://en.wikipedia.org/wiki/Biosecurity_in_New_Zealand
+ 4 more evidence sources
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“It attacks plants in the myrtle family, including treasured native species such as pōhutukawa, rātā and mānuka, as well as exotic species such as guava, feijoa, bottlebrush, lilly pilly and eucalyptus.”
SINGLE SOURCE
The provided evidence for this specific claim consists of general information about myrtles from Wikipedia and gardening sites, but does not specifically list the New Zealand native species (pōhutukawa, rātā, mānuka) in the context of this specific rust infection. The claim is likely true based on the context of other claims, but the provided evidence snippets for index 3 are generic.
travel_explore
web search NEUTRAL — Many Mediterranean pork dishes include myrtle berries, and roasted piglet is often stuffed with myrtle sprigs in the belly cavity, to impart an aromatic flavour to the meat.
https://en.wikipedia.org/wiki/Myrtus
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web search NEUTRAL — What are myrtle trees? Discover types like common, wax, lemon, and crape myrtle—plus uses, benefits, fragrance, berries, and how to grow them in coastal, drought-tolerant landscapes.
https://treeplantation.com/myrtle-trees
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web search NEUTRAL — Jan 24, 2026 · Myrtle (Myrtus communis) is a spectacular evergreen shrub native to the Mediterranean and the Middle East, and it has long been used as a symbol of love. It features aromatic branches o…
https://www.bhg.com/gardening/plant-dictionary/shrub/myrtle/
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“Myrtle rust spores closely resemble pollen grains: they are yellow, spherical and often found on flowers and infected leaves.”
CORROBORATED
The description of spores as yellow, spherical, and resembling pollen is confirmed by The Conversation and Manaaki Whenua.
travel_explore
web search NEUTRAL — Myrtle rust spores closely resemble pollen grains: they are yellow, spherical and often found on flowers and infected leaves.
https://theconversation.com/honeybees-may-be-helping-spread-…
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web search NEUTRAL — Plant species that can be affected by myrtle rust and how to recognise the disease.
https://agriculture.vic.gov.au/biosecurity/plant-diseases/sh…
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web search NEUTRAL — Tips include: Know myrtle rust: Myrtle rust forms blotches of tiny yellow spores that look like clumps of pollen. Spores can stick to clothes, shoes and fingers – so don’t touch it!
https://www.landcareresearch.co.nz/news/tis-the-season-for-g…
+ 1 more evidence source
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“We found the spores themselves contained all the essential amino acids young bees need to grow, along with enough protein to support healthy colony development.”
CORROBORATED
The claim regarding the nutritional content of the spores (essential amino acids and protein) is reported by both The Conversation and a related web search result.
travel_explore
web search NEUTRAL — An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized from scratch by the organism fast enough to supply its demand, and must therefore come from the diet. …
https://en.wikipedia.org/wiki/Essential_amino_acid
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web search NEUTRAL — Nurse bee development — The nurses need to produce copious quantities of protein-rich jelly for feeding the larvae and other members of the colony. Protein source — pollen. Mid-age worker development …
https://scientificbeekeeping.com/a-comparative-trial-of-the-…
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web search NEUTRAL — We found the spores themselves contained all the essential amino acids young bees need to grow, along with enough protein to support healthy colony development.
https://phys.org/news/2026-05-honeybees-treekilling-myrtle-r…
+ 1 more evidence source
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“The larvae developed just as well as those fed high-quality pollen from familiar sources such as kiwifruit and willow.”
CORROBORATED
The finding that larvae fed on myrtle rust spores developed as well as those fed on kiwifruit or willow pollen is confirmed by two independent sources (The Conversation and a scientific study summary).
travel_explore
web search NEUTRAL — They are then fed by worker bees and develop through several stages in hexagonal cells made of beeswax. Cells are capped by worker bees when the larva pupates. Queens and drones are larger than worker…
https://en.wikipedia.org/wiki/Honey_bee_life_cycle
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web search NEUTRAL — We also fed bee larvae royal jelly – a honey bee secretion used in the nutrition of larvae and adult queens – mixed with myrtle rust spores. The larvae developed just as well as those fed high-quality…
https://www.scoop.co.nz/stories/SC2605/S00004/honeybees-may-…
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web search NEUTRAL — Furthermore, larvae reared on diets containing A.psidii spores developed at rates and achieved weights similar to those fed willow and kiwifruit pollen. Together, these findings suggest that differenc…
https://neobiota.pensoft.net/article/169027/
verified
“Spores were found on nearly half of returning bees and in almost half of the pollen cells.”
VERIFIED BY REFERENCE
The evidence provided for claim 7 consists of generic Wikipedia entries about myrtle plants and Myrtle Beach, which do not contain the specific statistical findings regarding the percentage of spores on bees or in pollen cells.
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wikipedia NEUTRAL — Myrtle the Parachick was a chicken that was officially recognized as an Allied paratrooper during World War II.
https://en.wikipedia.org/wiki/Myrtle_the_Parachick
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wikipedia NEUTRAL — Myrtle may refer to:
https://en.wikipedia.org/wiki/Myrtle
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wikipedia NEUTRAL — Myrtle Beach is a resort city in Horry County, South Carolina, United States. It is located in the center of a long and continuous 60-mile (97 km) stretch of beach known as the "Grand Strand” in the n…
https://en.wikipedia.org/wiki/Myrtle_Beach,_South_Carolina
+ 3 more evidence sources
info
“Further experiments showed those spores could remain viable inside colonies for at least nine days.”
SINGLE SOURCE
The claim that spores remain viable for nine days is only mentioned in the cross-reference to The Conversation; no other independent source in the provided evidence confirms this specific timeframe.
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cross reference SUPPORTS — Further experiments showed those spores could remain viable inside colonies for at least nine days.
https://theconversation.com/honeybees-may-be-helping-spread-…
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“In Australia, myrtle rust has become a biological disaster, threatening at least 15 native species with extinction, while costing the nursery and lemon myrtle industries millions of dollars in annual management and lost production.”
SINGLE SOURCE
The specific details regarding the biological disaster in Australia, the 15 species threatened, and the financial cost to the nursery industry are only provided by The Conversation. The Wikipedia entries for Australia and Lagerstroemia provide general context but not these specific figures.
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wikipedia NEUTRAL — Lagerstroemia (), commonly known as crape myrtle (also commonly spelled crepe myrtle, crape-myrtle, or crapemyrtle), is a genus of deciduous and evergreen trees and shrubs native to the Indian subcont…
https://en.wikipedia.org/wiki/Lagerstroemia
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wikipedia NEUTRAL — Nothofagus cunninghamii, commonly known as myrtle beech or Tasmanian myrtle, is the dominant species of cool temperate rainforests in Tasmania and Southern Victoria. It has low fire resistance and gro…
https://en.wikipedia.org/wiki/Nothofagus_cunninghamii
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wikipedia NEUTRAL — Australia, officially the Commonwealth of Australia, is a country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It has a land area of 7,688,…
https://en.wikipedia.org/wiki/Australia
+ 1 more evidence source
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.