Zelus renardii (Kolenati, 1857) (Heteroptera, Reduviidae) can be used in biological control against seed pest Leptoglossus occidentalis (Heidemann, 1910)

Öz

Leptoglossus occidentalis, described by Heidemann in 1910, began to spread rapidly after the Second World War, and although it was first seen in Europe in 1999, it spread the entire continent within ten years. Its rapid adaptation to ecological conditions and the abundance of the species it feeds on have been effective in its spread. It was seen for the first time in our country in 2009, has managed to spread throughout the country in the course of time and its damage has been revealed in coniferous species seeds. It significantly reduces seed formation and germination, as it causes early cone casting and damages the embryo and endosperm parts of mature cones. When examined in terms of forestry studies; It is obvious that the reduction in seed source due to insect damage will adversely affect the natural regeneration and nursery activities in forests. Since the natural enemies of the insect have not yet emerged, the population cannot be balanced and it causes damage every year. As in our country, an effective method of struggle has not yet been put forward in the world. Chemical control is avoided with the concern that it will disrupt the ecological balance. For this reason, biological and biotechnical control methods are emphasized. One of these control methods is to use the natural enemies of L. occidentalis as predators. One of these natural predators is Zelus renardii (Kolenati, 1857), which started to spread in our country. The fact that it is a general predator and the overlap of L. occidentalis and nymphal stages necessitates the investigation of the usability of this species as a predator against L. occidentalis. Predatory behaviors of Z. renardi nymphs and adults obtained for this purpose were observed against their own species and L. occidentalis.

Anahtar Kelimeler

• Heteroptera
• Reduviidae
• Zelus renardii
• Coreidae
• Leptoglossus occidentalis
• Biological Control

Zelus renardii (Kolenati, 1857) (Heteroptera, Reduviidae)’nin tohum zararlısı Leptoglossus occidentalis (Heidemann, 1910)’e karşı biyolojik mücadelede kullanılabilirliği

Öz

Heidemann tarafından 1910 yılında tanımlanan Leptoglossus occidentalis (Heidemann, 1910) İkinci Dünya Savaşından sonra hızlı bir şekilde yayılmaya başlamış, Avrupa’da ilk kez 1999 yılında görülmesine rağmen on yıl içerisinde tüm kıtayı sarmıştır. Ekolojik şartlara hızlı adapte olması ve beslendiği türlerin fazlalığı yayılışında etkili olmuştur. Ülkemizde ilk kez 2009 yılında görülmüş, geçen süre içerisinde tüm ülkede yayılmayı başarmış ve ibreli tür tohumlarında zararları ortaya çıkmıştır. Erken dönem kozalak dökümüne neden olması, olgunlaşan kozalakların embriyo ve endosperm kısımlarına zarar vermesi nedeniyle tohum oluşumu ve çimlenmesini önemli ölçüde azaltmaktadır. Ormancılık çalışmaları açısından irdelendiğinde; böcek zararı nedeniyle tohum kaynağındaki azalmaların ormanlarımızdaki doğal gençleştirme ve fidanlık çalışmalarını olumsuz etkileyeceği aşikârdır. Böceğin doğal düşmanları henüz oluşmadığından popülasyon dengelenememekte ve her yıl zarar yapmaktadır. Ülkemizde olduğu gibi dünyada da henüz etkili bir mücadele yöntemi ortaya konulmuş değildir. Kimyasal mücadeleden ekolojik dengeyi bozacağı endişesi ile kaçınılmaktadır. Bu nedenle biyolojik ve biyoteknik mücadele yöntemleri üzerinde durulmaktadır. Bu mücadele yöntemlerinin biri de L. occidentalis’in doğal düşmanlarının predatör olarak kullanılmasıdır. Bu doğal predatörlerden biri ülkemizde yayılmaya başlayan Zelus renardii (Kolenati, 1857)’dir. Genel bir predatör olması ve L. occidentalis ile nimf dönemlerinin çakışması bu türün L. occidentalis’e karşı predatör olarak kullanılabilirliğinin araştırılmasını zorunlu kılmaktadır. Bu amaçla elde edilen Z. renardi nimf ve erginlerinin kendi türüne ve L. occidentalis’e karşı predatör davranışları gözlemlenmiştir.

Anahtar Kelimeler

• Leptoglossus occidentalis
• Zelus renardii
• biyolojik control

Kaynakça

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