Determination of efficacy of some fungicides used in hazelnut orchards against Ambrosiella hartigii Batra symbiotically associated with Anisandrus dispar Fabricius (Coleoptera: Curculionidae: Scolytinae) under laboratory conditions

Yıl 2019, Cilt: 34 Sayı: 2, 128 - 134, 25.06.2019

İsmail Erper , Rahman Kushıyev , Elif Yıldırım Muharrem Turkkan , Celal Tuncer

https://doi.org/10.7161/omuanajas.470201

Öz

Anisandrus
dispar Fabricius (Coleoptera: Curculionidae: Scolytinae)
cultivate symbiotic fungus Ambrosiella
hartigii Batra in the galleries found in sapwood of host trees for feeding.
Therefore, controlling the symbiotic fungus means depriving A. dispar of a source of food. In the
study, the efficacy of five doses (0.25x, 0.5x, 1.0x, 2.0x and 4.0x; where x is
the field rate recommended by the manufacturer) of five fungicides including
active ingredients of boscalid+kresoxim methyl, fluopyram+tebuconazole,
penconazole, sulphur and tetraconazole used in hazelnut orchards against
powdery mildew caused by Erysiphe
corylacearum was evaluated against A.
hartigii (TR-Ah-06 isolate) under laboratory conditions. The results of the
study showed that all doses of the fungicides significantly inhibited the
mycelial growth of A. hartigii when
compared to the control (P<0.05). Among them, fluopyram+tebuconazole, penconazole
and tetraconazole even at the lowest dose completely inhibited the mycelial
growth of the fungus. However, the mycelial growth was reduced at the rates of
29.56-100% depending on the increasing doses of boscalid+kresoxim methyl.
Sulphur inhibited the mycelial growth of A.
hartigii at the rates of 78.57-100% depending on the increasing doses. In
addition, the ED₅₀, MIC and MFC values of fluopyram+tebuconazole,
penconazole and tetraconazole were determined to be lower even than the 0.25x,
which was the lowest dose at the experiment. The results showed that the
fungicides, especially fluopyram+tebuconazole, penconazole and tetraconazole
were effective against A. hartigii.

Anahtar Kelimeler

Alternative control, Ambrosia beetles, Fungicides, Hazelnut, Symbiotic fungi

Determination of efficacy of some fungicides used in hazelnut orchards against Ambrosiella hartigii Batra symbiotically associated with Anisandrus dispar Fabricius (Coleoptera: Curculionidae: Scolytinae) under laboratory conditions

Öz

Fabricius (Coleoptera:
Curculionidae: Scolytinae) beslenmek amacıyla konukçu ağaçların odun dokusunda
açtıkları galerilerde simbiyoitk fungus Ambrosiella
hartigii Batra’yı yetiştirmektedir. Bu nedenle simbiyotik fungusun kontrol
edilmesi A. dispar'ı bir besin
kaynağından mahrum etmek anlamına gelmektedir. Bu çalışmada fındık bahçelerinde
fındık külleme hastalığına neden olan Erysiphe
corylacearum’a karşı kullanılan boscalid+kresoxim methyl,
fluopyram+tebuconazole, kükürt, penconazole ve tetraconazole etkili maddeli beş
fungisitin beş dozunun (0.25x, 0.5x, 1.0x, 2.0x ve 4.0x; buradaki x üretici
firma tarafından tavsiye edilen dozu ifade etmektedir) laboratuvar şartlarında A. hartigii (TR-Ah-06 izolatı)
üzerindeki etkinliği test edilmiştir. Sonuç olarak, fungisitlerin tüm dozları
kontrol ile kıyaslandığında bu fungusun misel gelişmesini önemli derecede
engellemiştir (P<0.05). Bunlar arasında en düşük dozdaki fluopyram+tebuconazole,
penconazole ve tetraconazole fungusun misel gelişmesini tamamen inhibe
etmiştir. Ayrıca, boscalid+kresoxim methyl’in dozlarının artmasına bağlı olarak
A. hartigii’nin misel gelişmesi
%29.56-100 arasında azalmıştır. Kükürtün dozlarının artmasına bağlı olarak bu
fungusun misel gelişmesi ise    %78.57-100
oranında engellenmiştir. Buna ek olarak, fluopyram+tebuconazole, penconazole ve
tetraconazole’nin ED₅₀, MIC ve MFC değerleri en düşük dozdan bile
düşük bulunmuştur. Sonuçlar bu fungisitlerin özellikle fluopyram+tebuconazole,
penconazole ve tetraconazole'nin A.
hartigii'ye karşı oldukça etkili olduğunu göstermiştir.

Anahtar Kelimeler

Alternatif mücadele, Ambrosya böcekleri, Fındık, Fungisitler, Symbiyotik fungus

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