CCL

Összesen 5 találat.
#/oldal:
Részletezés:
Rendezés:

1.

001-es BibID:BIBFORM108370
035-os BibID:(WOS)000320678800004 (Scopus)84878966969
Első szerző:Holb Imre (agrármérnök)
Cím:Effect of sanitation treatments on leaf litter density and leaf spot incidence in integrated and organic sour cherry orchards / Imre J. Holb
Dátum:2013
ISSN:0191-2917 1943-7692
Megjegyzések:A 3-year study was conducted to determine the effect of five sanitation treatments on leaf litter density (LLD), leaf spot incidence, and percent defoliation on two cultivars ('Ujfehertoi furtos' and 'Erdi botermo') in two sour cherry orchards: one managed by integrated pest management principles with conventional fungicides and the other managed organically. The following sanitation treatments were compared: sprays of urea or lime sulfur in autumn, removing fallen leaves after leaf fall, straw mulch cover in late winter, sprays of urea or lime sulfur followed by mulch cover, removing fallen leaves followed by mulch cover, and a nonsanitized control. In both orchards and all years, LLD decreased by 2 to 28% in all treatment plots from early December to mid-May. LLD reduction was two to four times higher in the organic orchard compared with the integrated orchard. All treatments, except the lime sulfur or urea treatment alone, resulted in significant (P < 0.05) reduction of LLD in both the integrated and organic orchards compared with nonsanitized plots. Only leaf removal alone or in combination with mulch significantly (P < 0.05) reduced cherry leaf spot incidence and percent defoliation (by 11 to 70% and 15 to 72%, respectively) compared with nonsanitized plots. The application of these sanitation treatments in orchard management practices is discussed.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plant Disease. - 97 : 7 (2013), p. 891-896. -
Pályázati támogatás:K-78399
OTKA
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

2.

001-es BibID:BIBFORM091095
Első szerző:Holb Imre (agrármérnök)
Cím:Effect of Fungicide Treatments and Sanitation Practices on Brown Rot Blossom Blight Incidence, Phytotoxicity, and Yield for Organic Sour Cherry Production / I. J. Holb, G. Schnabel
Dátum:2005
ISSN:0191-2917
Megjegyzések:Demand for organically grown fruit, including sour cherry, is rising in Europe and the United States, but the limited tools for disease management have not been thoroughly investigated. In this study, management of brown rot blossom blight, caused by Monilinia laxa, was examined for organic sour cherry production in Hungary. Combinations of sanitation practices and fungicide treatments, including copper hydroxide, lime sulfur, and micronized and nonmicronized wettable sulfur, were investigated in 2 years and two cultivars. The effect of fungicide treatments on yield and phytotoxicity on spur-leaf clusters was also determined. Among fungicide treatments suitable for organic production, copper hydroxide and lime sulfur alone or in combination with micronized wettable sulfur were most effective for blossom blight control when applied twice (at closed blossom and full bloom) or three times (at closed blossom, full bloom, and petal fall) during bloom. Both treatments were not as effective as the conventional standard and caused more damage on spur-leaf clusters during wet weather conditions, but significantly increased crop yield compared with the untreated control or wettable sulfur treatments. Micronized and nonmicronized sulfur applied up to three times during bloom were equally effective, did not impact yield, were not phytotoxic, and reduced blossom blight compared with the untreated control. Sanitation (the removal of blighted twigs and mummified fruit) reduced blossom blight in both cultivars compared with nonsanitized plots when disease pressure was high. The need for an integrated approach to effectively manage blossom blight in organic sour cherry production is discussed. This is the first in-depth characterization of cultural and chemical brown rot blossom blight control options for organic sour cherry production.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
brown rot incidence
Érdi bőtermő
IFOAM
Prunus vulgaris
Újfehértói fürtös
Megjelenés:Plant Disease. - 89 : 11 (2005), p. 1164-1170. -
További szerzők:Schnabel, Gouido
Pályázati támogatás:OTKA F043503
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

3.

001-es BibID:BIBFORM090926
Első szerző:Holb Imre (agrármérnök)
Cím:Effect of Pruning on Apple Scab in Organic Apple Production / I. J. Holb
Dátum:2005
ISSN:0191-2917
Megjegyzések:In a 3-year Hungarian study, the effectiveness of apple tree pruning as a management tactic for control of apple scab (Venturia inaequalis) was investigated on two susceptible (cvs. Jonagold and Mutsu), two moderately susceptible (cvs. Elstar and Idared), and two Vf resistant apple cultivars (cvs. Liberty and Prima) in three high-density organic apple orchards treated with copperand sulfur-based fungicide programs. The area under the disease progress curve (AUDPC) for leaf and fruit incidences was calculated to evaluate three winter pruning treatments (unpruned, weakly pruned, and strongly pruned). Strong pruning significantly decreased leaf scab on the susceptible and the moderately susceptible cultivars at all sites compared with unpruned ones. Moreover, for the cultivar Jonagold in all years and for the cultivar Mutsu in 2001, AUDPC values of strongly pruned trees were significantly lower at P = 0.05 compared with the weakly pruned trees. The effect of pruning on development of fruit scab was weaker than on leaf scab in all years and at all sites. For fruit scab incidence on susceptible cultivars, only strong pruning treatments decreased AUDPC significantly compared with unpruned treatments. The effects of pruning treatments on moderately susceptible cultivars were significant only in 2001 at all sites. Resistant cultivars showed no significant effect of pruning treatments on development of either fruit or leaf scab except for cultivar Liberty in 2001 at one site. Pruning resulted in no consistent difference in the apple tree canopy microclimate. However, strong pruning resulted in improved spray deposition in the tree canopy when applications were made with an airblast sprayer at midsummer. Results are compared with similar studies, and their biological interpretation is discussed.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
cultural control
disease incidence
integrated pest management
plant canopy microclimate
potential ascospore dose
scab control
Megjelenés:Plant Disease. - 89 : 6 (2005), p. 611-618. -
Pályázati támogatás:OTKA F043503
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

4.

001-es BibID:BIBFORM083863
Első szerző:Holb Imre (agrármérnök)
Cím:Integrated Control of Apple Scab and Powdery Mildew in an Organic Apple Orchard by Combining Potassium Carbonates with Wettable Sulfur, Pruning, and Cultivar Susceptibility / Imre J. Holb, Stefan Kunz
Dátum:2016
ISSN:0191-2917
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plant Disease. - 100 : 9 (2016), p. 1894-1905. -
További szerzők:Kunz, Stefan
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:

5.

001-es BibID:BIBFORM088159
Első szerző:Köhl Jürgen
Cím:Toward an Integrated Use of Biological Control by Cladosporium cladosporioides H39 in Apple Scab (Venturia inaequalis) Management / Köhl Jürgen, Scheer Christian, Holb Imre János, Masny Sylwester, Molhoek Wilma
Dátum:2015
ISSN:0191-2917
Megjegyzések:Apple scab, caused by Venturia inaequalis, is the most important disease in apple production, reducing yield and quality of fruit. Control of apple scab in commercial orchards currently depends on multiple applications of fungicides. The potential of the antagonistic isolate Cladosporium cladosporioides H39, originating from a sporulating colony of V. inaequalis, to control apple scab development was tested in eight trials during 2 years in orchards in Eperjeske (Hungary), Dabrowice (Poland), and Bavendorf (Germany) planted with different cultivars. Treatments were conducted as calendar sprays or after infection periods. Additional trials in an orchard in Randwijk (The Netherlands) focused on the effect of timing of antagonist application before or after infection periods. The overall results of the field trials consistently showed?for the first time?that stand-alone applications of the antagonist C. cladosporioides H39 can reduce apple scab in leaves and fruit. This was demonstrated in an organic growing system as well as in conventional orchards by spray schedules applied during the primary or the summer season. In both systems, the same control levels could be reached as with common fungicide schedules. Efficacies reached 42 to 98% on leaf scab incidence and 41 to 94% on fruit scab. The antagonist was also effective if applied one or even several days (equivalent to approximately 300 to 2,000 degree h) after infection events in several field trials and a trial conducted in Randwijk with single-spray applications at different intervals before or after infection events. Better understanding of the biology of the antagonist will help to further exploit its use in apple scab control.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
apple
Cladosporium cladosporioides
H39
Venturia inaequalis
Apple Scab (Venturia inaequalis) Management
Megjelenés:Plant Disease. - 99 : 4 (2015), p. 535-543. -
További szerzők:Scheer, Christian Holb Imre (1973-) (agrármérnök) Masny, Sylwester Molhoek, Wilma
Pályázati támogatás:K108333
Egyéb
TÁMOP-4.2.4.A/2-11/1-2012-0001
Egyéb
A2-SZJTOK-13-0061
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Rekordok letöltése1