Efficacy of insecticide Fipronil on grape cicada, Psalmocharias alhageos
2014
Gholmohamadi, Gholamreza, Hamedan Agricultural and Natural Resources Research Center | Farazmand,Hosain | Brati-Jurabi, Alireza
Grape cicada, Psalmocharias alhageos (Hem., Cicadidae), is one of the period important pests of vine trees in Iran. Main damage of P. alhageos is caused by long feeding period of nymphs on the vine roots and laying eggs of females under the bark of the shoots.Three insecticides incluging seversl formulation and dosae: Fipronil (GR 2% 50 gr, orginal), Fipronil (GR 2% 50 gr, iranian), Fipronil (GR 2% 40 gr, iranian), Fipronil (GR 2% 30 gr, iranian), Fipronil (SC 5% 30 ml), Cartap (GR 4% 50 gr) and Imidacloprid (Confidor® SC350 20 ml a.i) by soil application were compared. In this study The treatments were compared with the number of nymphal exuviae under vines and grape vine yield. The results showed that the maximum number of nymphal exuviae was recorded on the control treatment (8.60) and the minimum was on trees using the treatment of Imidacloprid (0.43). The highest and lowest of grape yield were recorded in Imidacloprid (3.00 kg) and control (0.48 kg) treatments, Fipronil (GR 2% 50 gr, iranian) (2.91kg) and Fipronil (GR 2% 50 gr, orginal) (2.91kg) respectively. Based on treatments ranking, application of Imidacloprid (20 ml at each vine tree), Fipronil (GR 2% 50 gr, iranian) and Fipronil (GR 2% 50 gr, orginal) at nymphs emergence time from soil was effective in decreasing of vine cicada damage and increasing of the grape vine yield. The coefficient of determination (R2) for the three years studies were 90, 86 and 93 percent respectively, indicating the existence of a strong relation between the the number of nymphal exuviae under vines and grape vine yield.
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