. Annual report. Entomological Society of Ontario; Insect pests; Insects. Showing location of experimental blocks in the large 75-acre Elberta peach orchard at St. Davids, Ontario. Each block covers one acre of land and con- tains approximately 100 trees. The liberations of Trichogramma in these blocks were planned with the object of determining their effect on L. molesta eggs present in the field from the beginning until the end of the season, and also for the pur- pose of determining the relative merits of single and repeated liberations, of various sized liberations and of different times o
. Annual report. Entomological Society of Ontario; Insect pests; Insects. Showing location of experimental blocks in the large 75-acre Elberta peach orchard at St. Davids, Ontario. Each block covers one acre of land and con- tains approximately 100 trees. The liberations of Trichogramma in these blocks were planned with the object of determining their effect on L. molesta eggs present in the field from the beginning until the end of the season, and also for the pur- pose of determining the relative merits of single and repeated liberations, of various sized liberations and of different times of liberation. The loss of a quantity of Trichogramma breeding stock early in the season due to ! a faulty thermostat on one of the rearing incubators prevented early lib- erations during the peak of the first generation peach moth egg lay. It was possible, however, to make liberations from June 25 until September 13. These liberations indicate that best results were obtained from those made where the host eggs were reaching a peak. The results obtained from liberations made when the host egg lay was on the decline were not as fav- j Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Entomological Society of Ontario; Ontario. Dept. of Agriculture. Toronto, The Society
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
