نتایج جستجو برای: trichogramma
تعداد نتایج: 764 فیلتر نتایج به سال:
Experiments were conducted to determine whether Trichogramma platneri Nagarkatti manifested a somatic-gametic trade-off and whether it was affected by host availability and host size. Large wasps produced on Trichoplusia ni Hübner and limited to five or 15 T. ni eggs daily, produced a similar number of progeny as wasps offered hosts from emergence. Similar results were obtained when they were d...
Abstract Effects of egg retention on movement and dispersal activity of Trichogramma principium (Hymenoptera, Trichogrammatidae) females were investigated under laboratory conditions. Individual females were observed during one minute in the absence of hosts. Movement activity and dispersal rate were estimated by the length of the track and by the distance from the start point, respectively. Be...
Natural enemies respond to herbivore-induced plant volatiles (HIPVs), but an often overlooked aspect is that there may be genotypic variation in these 'indirect' plant defence traits within plant species. We found that egg deposition by stemborer moths (Chilo partellus) on maize landrace varieties caused emission of HIPVs that attract parasitic wasps. Notably, however, the oviposition-induced r...
The issue of propagating parasitic insects in artificial food environments has been a challenge for researchers long time. Breeding one Trichogramma insect requires lot grain products and labor, it takes about 40-50 days 55-60 Bracon to reproduce. This study aimed develop technology the vitro reproduction trichogram, which are important entomophages control various agricultural pests. results e...
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