Page 54 - עלון הנוטע דצמבר 2020 ליצ'י ומנגו

39 ׳מעמ ףוס - שדח תוירטפ לטוק
the triazole difenoconazole + essential tea tree oil (TTO),
A novel Hybrid Fungicide for against scab in field-grown apples and against mycelial
the control of Apple scab growth of V. inaequalis in vitro. Regev was most inhibitory

to mycelial growth than difenoconazole alone or Orpan
Moshe Reuveni / Shamir Research Institute, University
of Haifa, Katzrin, Israel; STK, bio-ag technologies, Petah (tebuconazole + captan). Twenty-four isolates of V. inae-
Tikva, Israel qualis collected from infected leaves or fruits from apple
Lior Gur, Keren Levi / Shamir Research Institute, Univer- commercial orchards varied in their sensitivity to difeno-
sity of Haifa, Katzrin, Israel conazole. Regev improved the inhibition of the isolates
Amotz Farber / Shahaf, Kiryat Shmona, Israel and mainly of the less sensitive isolates to difenocon-
Aviad Shachar / Tarsis, Petah Tikva, Israel azole, which resulted with reduced the resistance level to
Jose Luis Henriquez / Faculty of Agronomical Sciences, difenoconazole. Foliar applications of Regev in field trials
University of Chile, Santiago, Chile were highly effective and provided better disease control
than difenoconazole alone and similar or superior to other
Scab, caused by Venturia inaequalis, is an important dis- synthetic fungicides or fungicidal mixtures. These findings
ease of apple. The fungal pathogen infects leaves, buds, suggest that Regev can be applied effectively against
blossoms and fruits and can reduce the quality and yield. scab disease and can be used as a strategic approach in
Disease control is based on fungicide applications in rela- fungicide resistance management, including in orchards
tion to phenological stage and rain events. Here we report in which loss of sensitivity to difenoconazole has been
on activity of Regev, a new hybrid fungicide containing detected. n

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2020 ,ד”ע הנש ’עטונה ןולע‘ 54 ‘Alon Hanotea’ vol. 74, 2020