DIFFERENCES IN HOST FINDING EFFICIENCY OF TRICHOGRAMMA SPP (HYMENOPTERA: TRICHOGRAMMATIDAE) IN FOUR AGROECOSYSTEMS IN THE MESILLA VALLEY
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Universidad Autónoma Chapingo
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In this study the objective was to determine differences in parasitism of natural occurring Trichogramma spp populations in corn, cotton, alfalfa and pecan. For this purpose 900 sentinel egg traps were placed for 24 hours in the four crops during 9 dates through the season in 2000 year. After that, the traps were carried to the lab and were put under suitable conditions of temperature and relative humidity. Four days after, the traps were checked under the stereo microscope to determine they contained parasitized eggs. The number of traps with parasitized eggs was registered for each crop and for each date. A statistical analysis of means comparison (Tukey a= .05) for dates and crops was performed using SAS V8 software. Results showed that there was not significant difference among dates, but there was among crops. Parasitism was higher in corn than in the rest of the crops. There was no difference between alfalfa, cotton and pecan.
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