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EFFICIENCY OF SUNN PEST, Eurygaster testudinaria (GEAFFROY) EGG PARASITOIDS IN NAJAF GOVERNARATE | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 14, Issue 3, 2009, Pages 0-0 | ||
| Authors | ||
| Z. A. A. Razak; H. F. Alrubeai | ||
| Abstract | ||
| Efficiency of field released of sunn pest, Eurygaster testudinaria (Geaffroy) egg parasitoids were investigated during 2007 and 2008 seasons at kuffa county wheat fields. The results indicated natural presence of Ooencyrtus sp., O. telenomicida (Vassiliev), Telenomus chloropus Thomson, Trissolcus rafiventris (Mayer) and Gryon fulviventre (Crawford) after about one week from the appearance of the first sunn pest egg mass during April. The discovery efficiencies of the released parasitods species were higher during 2008 and reached 13.77, 9.95, 4.07and 1.67 for G. fulviventre, T. chloropus O. telenomicida and Ooencyrtus sp. respectively. The parasitism efficiency was 100% for all parasitoids species at both seasons. The total impact of these parasitoids on sunn pest population was 6.92% during 2007 and 28.93% during 2008; the highest impact was for G. fulvirvntre. The results depicted that percentage of damaged seeds reduced to 3.33-3.35% after pasrasitoides released | ||
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