Study on efficacy of releasing Trissolcus grandis Thom. (Hym: Scelionidae) on controlling Eurygaster integriceps Put. (Het.: Scutelleridae) in wheat fields of Kermanshah province
2010
Bagheri Matin, S. | Safavi, A. | Babakfard, A. | Maleki, N.
Eurygaster integriceps is one of the most important pests in wheat and barely fields. At the moment large amounts of pesticides are being used for controlling this pest.Therefor to reduce chemical spraying of pesticides applying of parasitoid wasps in combination with other tools can be suitable alternative of chemicals replacement on control. During 2008-2009 the efficacy of releasing T.grandis on the rate of egg parasitism and lowering sunn damage to wheat fields were investigated. This study was performed in Dorood faraman region. All the stages of wasps were released in fields on the basis of 10000 number wasp per hectar according to 3-5 sunnpest per m2, during the beginning for laying eggs by sunn. In this research the cultivar used was Marvdasht. Regarding to average natural parasitism which is about 20%, our studies revealed that releasing the wasps led to 80% parasitism. So it is clear that releasing T.grandis in the fields with mentioned characteristics can lower sunnpest density and application of pesticides along with conserving natural resourses.
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