. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. COLONI/ATION. {â > lil)C'rat(Ml at the sjuu(> time, and in tliis case the iiinnlx-r of larva- lib- erated is ol'toii i(>(luco(l ()ii(>-liaH". Tlie method of liberating iield eolonies ol" Calosonui l)eetles lias de- l)ended on whether adults or larviv were to be planted. When adults were used, they were taken to the area selected and seattered about amono; the badly infested trees. More care was required in distributing::: larval colonies as it was neces- sary to pack the larvfe se])arately s
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. COLONI/ATION. {â > lil)C'rat(Ml at the sjuu(> time, and in tliis case the iiinnlx-r of larva- lib- erated is ol'toii i(>(luco(l ()ii(>-liaH". Tlie method of liberating iield eolonies ol" Calosonui l)eetles lias de- l)ended on whether adults or larviv were to be planted. When adults were used, they were taken to the area selected and seattered about amono; the badly infested trees. More care was required in distributing::: larval colonies as it was neces- sary to pack the larvfe se])arately so that they would not injure each other before they were turned loose. In 1909 the larvte were placed separately in glass tubes, both ends of which were plugged with cotton. Before inserting the last plug, a. Fig. 21.âTwo Inmilrcd IiiIk's, cacli (umtaiiiiiiy: ii hirvn of ('(iliiaoiiKt i-!icui)l(a))tu, ri-sidy for coloniza- tion. (Original.) small amount of earth and sometimes a cateri)illar or pupa was added with the beetle larva. Tiiese tubes were packed in a basket and taken to the place where the colony was to be liberated. (See fig. 21.) On arrival the contents were dumped at the base of infested trees and the tubes returned for refilling. Frequently the tubes became broken in handling and transit, and occasionally some of the larva? made their way through the cotton plugs and escaped. In 1910, a better device was used (fig. 22), which consisted of sev- eral units of wood in which was bored a double row of 10 holes, so that each block would accommodate 20 larva\ The bottom of the block. 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 United States. Bureau of Entomology. Washington : G. P. O.
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
