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Fruit Tree Sciences
 Arnon
Dag, Ph.D.
Tel: 972 8 89928630
Mobile: 972 56 220155
Fax: 972 8 9926485
arnondag@volcani.agri.gov.il
Gilat Research Center
Agricultural Research Organization
Ministry of Agriculture
Mobile Post Negev 85280
Israel
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Areas of Expertise
- Reproductive biology of fruit trees
- Crop pollination
- Pomology in semi-arid conditions
- Olive biology and cultivation
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| Current projects |
Project funding |
| Integrative program for promoting olive oil industry in Israel. |
ARO- Director Fund |
| Use of growth regulator to regulate olive tree size |
Olive Board, R & D – Ramat Negev |
| Improving honey bee (Apis mellifera) colony performance by feeding pollen supplements |
MERC |
| Enhancement of avocado pollination and productivity - an interdisciplinary approach |
BARD |
| Evapotranspiration-regulate irrigation scheduling in olive using recycled water |
USDA-ARS |
| Iron fertilization in olive |
Agrica / Syngenta |
| Mapping and comparing oils. |
EU |
| Treated wastewater for irrigation of olive for oil production. |
Chief Scientist of the Ministry of Agriculture |
| Developing early apricot for export from Arad Valley |
Chief Scientist of the Ministry of Agriculture |
| Guava- a new export crop |
Chief Scientist of the Ministry of Agriculture |
 Staff:
Moshe Aharon
Hamdi Alwaleedi
Yulia Sabotin
Isaac Zipori
Recent publications
 Reviewed
articles
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Dag, A. and Eisikowitch, D. (1995). The influence of hive
location on honeybee foraging activity and fruit set in melons
grown in plastic greenhouses. Apidologie 26: 511-519.
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Dag, A., Slabezki, Y., Efrat, H., Kamer, Y., Yakobson, B.A.,
Mozes-Koch R. and Gerson, U. (1997). Control of honey bee tracheal
mite infestation with Amitraz fumigation in Israel. Am.
Bee. J. 137: 599-602.
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Dag, A., Eisenstein, D., Degani, C., El-Batsri, R. and Gazit,
S. (1998). Pollen parent effect on the selective abscission
of ‘Tommy Atkins’ mango. J. Amer. Soc. Hort. Sci. 123:
618-622.
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Dag, A. and Eisikowitch, D. (1999). Ventilation of greenhouses
increases honeybee foraging activity on muskmelon, Cucumis
melo. J. Apic. Res. 38: 169-175.
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Dag, A., Gazit, S., Eisenstein, D., El-Batsri, R. and Degani,
C. (1999). Effect of the male parent on pericarp and seed weights
in several Floridian mango cultivars. Scientia Hort. 82:
325-329.
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Dag, A., Eisenstein, D. and Gazit, S. (2000). Effect of
temperature regime on pollen and the effective pollination
of ‘Kent’ mango in Israel. Scientia Hort. 86:
1-11.
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Dag, A. and Gazit, S. (2000). Mango pollinators in Israel. J.
Appl. Hort. 2: 39-43.
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Dag, A. and Eisikowitch, D. (2000). The effect of carbon
dioxide enrichment on nectar production in melon under greenhouse
conditions. J. Apic. Res. 39: 88-89.
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Dag, A., Weinbaum, S.A., Thorp, R. and Eisikowitch, D. (2000).
Evaluation of pollen dispensers (‘inserts’) effect
on fruit set and yield in almond. J. Apic. Res. 39:
117-123.
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Mozes-Koch, R., Slabezki, Y., Efrat, H., Kamer, Y., Kalev,
H, Yakobson, B.A. and Dag, A. (2000). First detection in Israel
of fluvalinate resistance in the varroa mite using bioassay
and biochemical methods. J. Exp. Appl. Acar. 24:
25-33.
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Slabezki, Y., Efrat, H., Dag, A., Kamer, Y., Yakobson, B.A.,
Mozes-Koch, R.and Gerson, U. (2000). The effect of honey bee
tracheal mite infestation on colony development and honey yield
of Buckfast and Italian honey bee strains in Israel. Am.
Bee. J. 140: 231-234.
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Stern, R.A., Eisikowitch, D. and Dag, A. (2001). Sequential
introduction of honeybee colonies and doubling their density
increase cross-pollination, fruit set and yield in ‘Red
Delicious’ apple. J. Hort. Sci. Biothech. 76:
17-23.
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Dag, A. and Kamer, Y. (2001). Comparison between the effectiveness
of honeybee (Apis mellifera) and bumblebee (Bombus
terrestris) as pollinators of greenhouse sweet pepper
(Capsicum annuum). Am. Bee. J. 141: 447-448.
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Dag, A., Kamer, Y. and Efrat, H. (2001). Characterization
of citrus honey flow in Israel. Apiacta 36: 102-105.
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Dag, A., Lior, E. and Afik, O. (2002). Pollination of confection
sunflowers (Helianthus annuus L.) by honey bees (Apis
mellifera L.) Am. Bee. J. 142: 443-445.
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Devash, L., Afik, O., Shafir, S., Schaffer, A., Yeselson,
Y., Dag, A. and Landau, S. (2002). Determining by Near-Infrared
Spectroscopy of perseitol used as a marker for botanical origin
of avocado (Persea Americana Mill.) honey J. Agric.
Food Chem. 50: 5283-5287.
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Kalev, H., Dag, A. and Shafir, S. (2002). Feeding pollen
supplements to honey bee colonies during pollination of sweet
pepper in enclosures. Am. Bee J. 142: 672-678.
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Dag, A., Fetscher, A.E., Afik, O., Yeselson, Y., Schaffer,
A., Kammer, Y., Waser, N.M., Madore, M.A., Arpaia, M.L., Hofshi,
R. and Shafir, S. (2003). Honeybee (Apis mellifera)
strains differ in avocado (Persea americana) nectar
foraging preferences. Apidologie 34: 299-309.
- Freeman, S., Minz, D., Kolesnik, I., Barbul, O., Zveibil,
A., Maymon, M., Nitzani, Y., Kirshner, B., Rav-David, D., Bilu,
A., Dag, A., Shafir, S. and Elad, Y. (2004). Trichoderma biocontrol
of Colletotrichum acutatum and Botrytis cinerea in strawberry,
population survival, and identification of biocontrol isolates
according to ITS sequence analysis. Europ. J. Plant Pathol. 110:
361-370.
- Bilu, A., Dag, A., Elad, Y. and Shafir, S (2004). Honey bee
dispersal of biocontrol agents: an evaluation and improvement
of dispensing devices. Biocontol Sci. Tech. 14: 607-617.
- Stern, R., Goldway, M., Zisovich, A., Shafir, S. and Dag, A.
(2004). Sequential introduction of honeybee colonies increase
cross-pollination, fruit-set and yield of 'Spadona' pear (Pyrus
communis L.). J. Hort. Sci. Biotech. 79: 652-658.
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Dag, A. and Mizrahi, Y. (2005). Effect of pollination methods on fruit set and fruit characteristics of the vine cactus Selenicereus megalanthus ('yellow pitaya'). J. Hort. Sci. Biothech. 80: 618-622.
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Dag, A., Afik, O., Yeselson, Y., Schaffer, A. and Shafir, S. (2006).
Physical, chemical and palynological characterization of avocado (Persea americana Mill) honey in Israel. Int. J. Food. Sci. Tech. 41: 387-394.
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Afik, O., Dag, A. and Shafir, S. (2006). The effect of avocado (Persea americana) nectar composition on its attractiveness to honey bees. Apidologie 37: 317-325.
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Afik, O., Dag. A., Kerem, Z. and Shafir, S. (2006). Analysis of avocado (Persea americana) nectar properties and their perception by honeybees (Apis mellifera). J. Chem. Ecol. 32: 1949-1963.
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Shafir, S., Dag, A., Bilu, A., Abu-Toamy, M. and Elad, Y. (2006).
Honey bee dispersal of the biological agent Trichoderma harzianum T39: effectiveness in suppressing Botrytis cinerea on strawberry under field conditions. J. Europ. Plant Pathol. 116: 119-128.
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Dag, A., Zipori, I. And Pleser, Y. (2006). Using bumblebees to improve almond pollination by the honeybee. J. Apic. Res. 54: 215-216.
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Afik, O., Dag, A. and Shafir, S. (2007). The perception of avocado (Persea americana: Lauraceae) bloom by the honey bee (Apis mellifera: Hymenoptera): a review. Entomol. Generalis. (accepted)
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Stern, R.A., Sapir, G., Shafir, S., Dag, A. and Goldway, M. (2007). The appropriate management of honey bee colonies for pollination of Rosacea fruit trees in warm climates. Middle Eastern and Russian J. Plant Sci. Biotech. (in press)
- Afik, O., Dag, A. and Shafir, S. (2007). Honey bee (Apis mellifera) round dance influenced by trace element composition of floral nectar. Anim. Behav. (accepted)
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