. Annual report. Entomological Society of Ontario; Insect pests; Insects. ENTOMOLOGICAL SOCIETY 81 The introduction of new fumigation treatments has greatly facilitated the movement of produce outside the quarantined area, with consequent benefit to the Fig. 2.—Using methyl bromide applicator in refrigerator car fumigation. Original photograph. Treatment of potted plants and nursery stock.—In the year-round treatments of nursery products and soil, in previous years the chief prac- tice was the application of lead arsenate to large areas of land in the nurs- eries. The introduction o
. Annual report. Entomological Society of Ontario; Insect pests; Insects. ENTOMOLOGICAL SOCIETY 81 The introduction of new fumigation treatments has greatly facilitated the movement of produce outside the quarantined area, with consequent benefit to the Fig. 2.—Using methyl bromide applicator in refrigerator car fumigation. Original photograph. Treatment of potted plants and nursery stock.—In the year-round treatments of nursery products and soil, in previous years the chief prac- tice was the application of lead arsenate to large areas of land in the nurs- eries. The introduction of efficient fumigation methods appears to have reduced the necessity for this procedure, as only the stock actually being shipped out has to be treated. Methyl bromide is now used extensively for this fumigation work. It is usually applied at the rate of pounds of fumigant per 1000 cubic feet of vault space for a period of hours at a temperature of not less than 63 deg. F. Many of the growers in the quarantined area have erected their own fumigation chambers which usually vary from 100 to 200 cubic feet in capacity, constructed with a 2 by 4 inch wooden framework, with three-ply wood on the outside and sheets of soldered galvanized iron on the inside. All the vaults have to be equipped with approved gas cir- culating devices, often one-sixth horse power household furnace blowers, and with evaporating pans underneath the methyl bromide inlet to vaporize the fumigant. Heating coils are usually placed near the floor and the circu- lating blower can be used to force the gas up the exhaust pipe at the end of the treatment period. A wide range of nursery and greenhouse plants have been subjected to this treatment and only a small percentage of the varieties tested have suffered any 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 pe
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
