Differences Among Fungicides Targeting Beneficial Fungi Associated with Honey Bee Colonies

Yoder, Jay A.; Hedges, Brian Z.; Heydinger, Derrick J.; Sammataro, Diana; DeGrandi-Hoffman, Gloria

doi:10.1201/b11318-16

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A growing awareness about the importance of the intestinal microbiota composition for honey bee health and growth has been reported (Martinson et al, 2011). Moreover, bees themselves are constantly exposed to pesticides, which in turn may impair beneficial in-hive microbes (Yoder et al, 2012). Because specific bacteria are consistently associated with A. mellifera, it has been suggested that these bacteria are beneficial mutualists (Martinson et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Effects of the organic acids produced by a lactic acid bacterium in Apis mellifera colony development, Nosema ceranae control and fumagillin efficiency

Maggi

Negri

Plischuk

et al. 2013

Veterinary Microbiology

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Effects of the organic acids produced by a lactic acid bacterium in Apis mellifera colony development, Nosema ceranae control and fumagillin efficiency

Maggi

Negri

Plischuk

et al. 2013

Veterinary Microbiology

View full text Add to dashboard Cite

“…Some Rhizopus species, such as R. oryzae and R. stolonifera , are weak parasites of ripening honeybee-pollinated fruit crops, including apple, peach, strawberry, citrus, persimmon, pear, and pumpkin [ 39 , 41 , 42 , 43 , 44 ]. Following the bees’ foraging activities on infected crops, fungal spores gain entry and become established in the beehive by dissemination through direct contact and food contamination [ 45 , 46 ]. Rhizopus spp.…”

Section: Introductionmentioning

confidence: 99%

A New Isolated Fungus and Its Pathogenicity for Apis mellifera Brood in China

Aynalem,

Meng,

Getachew

et al. 2024

Microorganisms

View full text Add to dashboard Cite

In this article, we report the pathogenicity of a new strain of fungus, Rhizopus oryzae to honeybee larvae, isolated from the chalkbrood-diseased mummies of honeybee larvae and pupae collected from apiaries in China. Based on morphological observation and internal transcribed spacer (ITS) region analyses, the isolated pathogenic fungus was identified as R. oryzae. Koch’s postulates were performed to determine the cause-and-effect pathogenicity of this isolate fungus. The in vitro pathogenicity of this virulent fungus in honeybees was tested by artificially inoculating worker larvae in the lab. The pathogenicity of this new fungus for honeybee larvae was both conidial-concentration and exposure-time dependent; its highly infectious and virulent effect against the larvae was observed at 1 × 105 conidia/larva in vitro after 96 h of challenge. Using probit regression analysis, the LT50 value against the larvae was 26.8 h at a conidial concentration of 1 × 105 conidia/larva, and the LC50 was 6.2 × 103 conidia/larva. These results indicate that the new isolate of R. oryzae has considerable pathogenicity in honeybee larvae. Additionally, this report suggests that pathogenic phytofungi may harm their associated pollinators. We recommend further research to quantify the levels, mechanisms, and pathways of the pathogenicity of this novel isolated pathogen for honeybee larvae at the colony level.

show abstract

“…Despite expectations of selectivity between fungi and animals, fungicides can have adverse effects on honeybees at the colony level, including malnutrition, poor brood-rearing, queen loss, reductions in beneficial fungi, increased titres of viral and microsporidial pathogens, and impaired foraging activities [10][11][12][13][14][15][16][17][18][19]. One such mixture routinely used in almond production is Pristine ® , a formulated fungicide that combines boscalid with pyraclostrobin, a strobilurin fungicide that also targets energy production pathways.…”

Section: Introductionmentioning

confidence: 99%

Fungicide suppression of flight performance in the honeybee ( Apis mellifera ) and its amelioration by quercetin

et al. 2019

View full text Add to dashboard Cite

As a managed agricultural pollinator, the western honeybee Apis mellifera frequently encounters agrochemicals as contaminants of nectar and pollen. One such contaminant, the fungicide boscalid, is applied at bloom in orchards for fungal floral pathogen control. As an inhibitor of complex II in the mitochondrial electron transport chain of fungi, boscalid can potentially interfere with high energy-demanding activities of bees, including flight. We designed an indoor flight treadmill to evaluate impacts of ingesting boscalid and/or quercetin, a ubiquitous phytochemical in bee food that also affects mitochondrial respiration. Boscalid reduced the wingbeat frequencies of foragers during flight but did not alter the duration of flight. At the colony level, boscalid ingestion may thereby affect overall health by reducing forager efficiency. The consumption of quercetin, by contrast, led to higher adenosine triphosphate levels in flight muscles and a higher wingbeat frequency. Consuming the two compounds together increased wingbeat frequency, demonstrating a hitherto unrecognized mechanism by which dietary phytochemicals may act to ameliorate toxic effects of pesticides to promote honeybee health. In carrying out this work, we also introduce two methodological improvements for use in testing for pesticide effects on flight capacity—a ‘force-feeding’ to standardize flight fuel supply and a novel indoor flight treadmill.

show abstract

Differences Among Fungicides Targeting Beneficial Fungi Associated with Honey Bee Colonies

Cited by 4 publications

References 0 publications

Effects of the organic acids produced by a lactic acid bacterium in Apis mellifera colony development, Nosema ceranae control and fumagillin efficiency

Effects of the organic acids produced by a lactic acid bacterium in Apis mellifera colony development, Nosema ceranae control and fumagillin efficiency

A New Isolated Fungus and Its Pathogenicity for Apis mellifera Brood in China

Fungicide suppression of flight performance in the honeybee ( Apis mellifera ) and its amelioration by quercetin

Contact Info

Product

Resources

About