Antifeedant effects of some bryophyte species on Thaumetopoea wilkinsoni Tams, 1925 (Lepidoptera: Notodontidae)

Öz

In this study, antifeedant effects of ethanol extracts obtained from the bryophyte species Hypnum cupressiforme Hedw. and Conocephalum conicum (L.) Dumort. against larvae of Thaumetopoea wilkinsoni Tams a major defoliator of pine trees in Türkiye, were investigated. Within the scope of the study, 0.5%, 1%, and 5% concentration solutions were prepared from the extracts of both plant species, and pine needles dipped into these solutions were placed into containers containing pine processionary moth larvae. As a result, the needle consumption amounts of the 0.5%, 1%, and 5% solutions of Hypnum cupressiforme extract were calculated as 77 mg, 41 mg, and 31 mg for the 1st larvae; 100 mg, 87 mg, and 48 mg for the 2nd larvae; 142 mg, 131 mg, and 91 mg for the 3rd larvae; 207 mg, 193 mg, and 158 mg for the 4th larvae; and 298 mg, 285 mg, and 257 mg for the 5th larvae, respectively. Similarly, needle consumption amounts of the 0.5%, 1%, and 5% solutions of Conocephalum conicum extract were determined as 60 mg, 32 mg, and 16 mg for the 1st larvae; 93 mg, 54 mg, and 30 mg for the 2nd larvae; 135 mg, 111 mg, and 67 mg for the 3rd larvae; 194 mg, 171 mg, and 131 mg for the 4th larvae; and 286 mg, 269 mg, and 238 mg for the 5th larvae, respectively. Based on these results, the highest AFI (Antifeeding Index) value (71.68) was obtained from the 5% concentration solution of C. conicum extract applied to 1st larvae.

Anahtar Kelimeler

• Antifeedant effect
• Hypnum cupressiforme
• Conocephalum conicum
• Thaumetopoea wilkinsoni
• Bryofit.

Bazı bryofit türlerinin Thaumetopea wilkinsoni Tams, 1925 (Lepidoptera: Notodontidae) üzerindeki antifeedant etkileri

Öz

Bu çalışmada, bryofit türlerinden olan Hypnum cupressiforme Hedw. (Hypnaceae) ve Conocephalum conicum (L.) Dumort. (Conocephalaceae) türlerinden elde edilen etanol ekstraktların, Türkiye’de çam ağaçlarında yaprak zararlısı olan Thaumetopoea wilkinsoni Tams, 1926 (çam kese böceği) larvaları üzerindeki beslenme engelleyici etkileri araştırılmıştır. Bu kapsamda her iki bitki türünün ekstraktlarından %0.5, %1 ve %5 derişimli çözeltiler hazırlanmış ve çam ibreleri bu çözeltilere batırılarak çam kese böceği larvalarının kaplarına yerleştirilmiştir. Sonuç olarak H. cupressiforme ekstraktının %0.5, %1 ve %5 çözeltilerinin 1. dönem larvalar için yiyim miktarları sırasıyla 77 mg, 41 mg, 31 mg, 2. dönem larvalar için 100 mg, 87 mg, 48 mg, 3. dönem larvalar 142 mg, 131 mg, 91 mg, 4. dönem larvalar için 207 mg, 193 mg, 158 mg, 5. dönem larvalar için ise 298 mg, 285 mg ve 257 mg olarak hesaplanmıştır. C. conicum ekstraktının %0.5, %1 ve %5 çözeltilerinin 1. dönem larvalar için yiyim miktarları sırasıyla 60 mg, 32 mg, 16 mg, 2. dönem larvalar için 93 mg, 54 mg, 30 mg, 3. dönem larvalar için 135 mg, 111 mg 67 mg, 4. dönem larvalar için 194 mg, 171 mg, 131 mg, 5. dönem larvalar için ise 286 mg, 269 mg ve 238 mg olarak hesaplanmıştır. Bu sonuçlara bağlı olarak en yüksek AFI (Antifeeding Index) değeri (71.68) 1. larva larvalara uygulanan C. conicum ekstraktının %5 derişimli çözeltisinde bulunmuştur.

Anahtar Kelimeler

• Beslenme engelleyici etki
• Hypnum cupressiforme
• Conocephalum conicum
• Thaumetopoea wilkinsoni
• Bryofit.

Kaynakça

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