Abstract
Inundative mass application of Metarhizium brunneum BIPESCO 5 (Hypocreales, Clavicipitaceae) is used for the biological control of Diabrotica v. virgifera (Coleoptera, Chrysomelidae). Long-term field trials were performed in three Austrian maize fields—with different cultivation techniques and infestation rates—in order to evaluate the efficacy of the treatment to control the pest larvae. In addition, the indigenous Metarhizium spp. population structure was assessed to compare the different field sites with BIPESCO 5 mass application. Annual application of the product Granmet-PTM (Metarhizium colonized barley kernels) significantly increased the density of Metarhizium spp. in the treated soil above the upper natural background level of 1000 colony forming units per gram dry weight soil. Although a decrease in the pest population over time was not achieved in heavily infested areas, less damage occurred in treated field sites in comparison to control sites. The Metarhizium population structure was significantly different between the treated field sites. Results showed that inundative mass application should be repeated regularly to achieve good persistence of the biological control agent, and indicated that despite intensive applications, indigenous populations of Metarhizium spp. can coexist in these habitats. To date, crop rotation remains the method of choice for pest reduction in Europe, however continuous and preventive application of M. brunneum may also present an alternative for the successful biological control of Diabrotica.
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Claims 7
Claim · model-written summary
Annual Granmet-PTM increased soil Metarhizium above natural background.
- Treatment
- Granmet-PTMe0
- Interactor
- Metarhizium spp.
Metarhiziume0biocontrol_agent - Outcome
- density of Metarhizium spp. in the treated soile0
- Direction
- increasede0
- Value
- 1000 colony forming units per gram dry weight soile0
- Comparator
- upper natural background levele0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Annual application of the product Granmet-PTM (Metarhizium colonized barley kernels) significantly increased the density of Metarhizium spp. in the treated soil above the upper natural background level of 1000 colony forming units per gram dry weight soil”
t0“maize”
Claim · model-written summary
Heavily infested areas showed no pest population decrease over time.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in the pest population over time was not achieved in heavily infested areas”
t0“maize”
Claim · model-written summary
Treated field sites had less damage than controls.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less damage occurred in treated field sites in comparison to control sites”
t0“maize”
Claim · model-written summary
Metarhizium population structure differed between treated field sites.
- Interactor
- MetarhiziumMetarhiziume0biocontrol_agent
- Outcome
- Metarhizium population structuree0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Metarhizium population structure was significantly different between the treated field sites”
t0“maize”
Claim · model-written summary
Repeated mass application is recommended for agent persistence.
- Outcome
- mass application should be repeated regularlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inundative mass application should be repeated regularly to achieve good persistence of the biological control agent”
t0“maize”
Claim · model-written summary
Indigenous Metarhizium populations can coexist despite intensive applications.
- Interactor
- Metarhizium spp.Metarhiziume0biocontrol_agent
- Outcome
- indigenous populations of Metarhizium spp. can coexiste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“despite intensive applications, indigenous populations of Metarhizium spp. can coexist in these habitats”
t0“maize”
Claim · model-written summary
Continuous preventive M. brunneum application may be an alternative for Diabrotica control.
- Interactor
- Diabrotica
Diabroticae0pest - Second interactor
- M. brunneumMetarhizium brunneume0biocontrol_agent
- Outcome
- continuous and preventive application of M. brunneume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“continuous and preventive application of M. brunneum may also present an alternative for the successful biological control of Diabrotica”
t0“maize”
The same questions in other papers
climate site · pest · Zea mays (maize)Results agree
7 papers in the same direction as this paper
- positive
- positive
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See all 8 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.