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Grape cicada, Psalmocharias alhageos (Hem.: Cicadidae), is one of the most important pests of vine trees in Iran. Main damage of the pest is caused by prolonged feeding of nymphs on the vine roots and egg laying of females under the bark of the shoots. Grape cicada completes one generation in a period of 4 years. The nymphs emerge from the soil around late May and the emergence of adults from the soil was to Mid August. In order to pest control, in addition to mechanical control through pruning and removal of branchs containing pest eggs, application of fipronil (Regent® G 0.2%) (50 gr for each vine tree), imidacloprid (Confidor® SC350) (15-20 ml for each vine tree), thiamethoxam (Actara® WG 25%) (20 gr for each vine tree) during nymphs' emergence period from soil was effective in decreasing vine cicada damage and increasing grape vine yield. Also, application of new formulation of Diatomaceous Earth before nymphs' emergence time from soil, can prevent from the nymphs from passeing through the soil and results in decreasing nymphs' population and increasing grape vine yield. Spraying kaolin (Sepidan® WP) spray over the whole canopy of vine trees, two times at 4-week interval (5% concentration), could be used successfully to reduces grape cicada damage.Key Words: vine cicada, Psalmocharias alhageos, chemical control, imidacloprid, thiamethoxam, fipronil, DE, kaolin
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