Edwardsiana rosae (L.)
Common name: Rose leafhopper.
Taxonomic placing: Insecta, Hemimetabola, Hemiptera, Cicadellidae.
Host plants: Various Rosaceae, including apple, pear, plum, nectarines, rose and others, as well as grapevines.
Morphology: The adults are yellow-white about 3.5-4.0 mm long, the nymphs are white, almost tranparent.
Life history: The overwintering eggs (about 60/female) are deposited under the bark of young host trees. In spring the young emerge and feed on the lower sides of leaves. The eggs of the summer generation are placed along the main veins of the lower leaf sides, located at the upper host plant stories. In the Middle East the rose hopper raises two or three annual generation. The threshold of development was calculated to be at 7.0°C, optimal night temperatures for larval development at 13–15°C and day temperatures of 23–25°C.
Economic importance: The sucking of the pest results in whitish spots on leaves, which become silvery, greatly disrupting photosynthesis. Young leaves may curl as they grow. Heavy infestations can affect all leaves. Fruit quality is affected, damage being compounded by the contaminating dark excrement pellets, which require special brushing operations. In addition, the quality and quantity of next year’s crop may be affected.
Monitoring: Population trends and early warnings about pest arrival can be obtained by placing yellow sticky boards in the orchards, especially at its margins. Another method is vacuuming the exterior and interior foliage of host trees. Visual monitoring can be conducted by examining the lower sides of ten leaves, or two leaves from each of five shoots as soon as the fruits begin to set. The presence of even 0.5 nymphs/leaf serves as an indication for treatments.
Horticultural control: Pruning the upper host tips of the host plants which the pest prefers.
Chemical control: The pest has developed extensive resistance to many insecticides, but the botanical ryania may still be effective. Treatments should be aimed at the more susceptible young nymphs, especially at the edges of orchards, where the pest tends to colonize and aggregate.
Biological control: The mymarid egg parasitoid Anagrus atomus Linnaeus attacks the pest in North America. Spiders also feed on the hopper.
Childs, L. 1918. The life-history and control of the rose leafhopper -an apple pest. Oregon Agricultural College Experiment Station Bulletin 148, pp. 32.
Day, M.L., Hogmire, H.W. and Brown, M.W. 1995. Biology and management of rose leafhopper (Homoptera: Cicadellidae) on apple in West Virginia. Journal of Economic Entomology 88: 1012-1016.
Day, M.L., Hogmire, H.W. and Brown, M.W. 1996. Reproductive potential and development of rose leafhopper, Edwardsiana rosae (L.) (Homoptera Cicadellidae), at constant temperatures on apple. Journal of Entomological Science 31: 427-431.
Elsner, E. A. & E. H. Beers. 1988. Yellow sticky board trapping of Typhlocyba. Pomaria, Edwardsiana rosae and Anagrus sp. in Central Washington. Melanderia 46: 55-64.
Nestel, D. and Klein, M. 1997. Colonization and spread of leafhoppers in deciduous orchards. Phytoparasitica 25, p. 164.
Oppenheim, D., Palevsky, E., Horovitz, I., Shaltiel, L., Reuveny, H. and Aconis, O. 1997. The influence of poison-free pest management on the fauna of arthropod pests and their natural enemies in an apple orchard at Havat Matityahu, Israel, during the seasons of 1994-96. Alon Hanotea 51: 346-356 (in Hebrew with an English abstract).
Reineke, A. and Hauck, M. 2012. Larval development of Empoasca vitis and Edwardsiana rosae (Homoptera: Cicadellidae) at different temperatures on grapevine leaves. Journal of Applied Entomology 136: 656-664.
Straub, R.W. and Jentsch, P.J. 1994. Relationship of the white apple leafhopper, Typhlocyba pomaria McAtee, and the rose leafhopper, Edwardsiana rosae (L.), on apple in the Hudson Valley region of New York. Journal of Agricultural Entomology 11: 301-309.
Wisniewska, J. and Prokopy, R.J. 1997. 1997. Do spiders (Araneae) feed on rose leafhopper (Edwardsiana rosae; Auchenorrhyncha: Cicadellidae) pests of apple trees? European Journal of Entomology 94: 243-251.