. The hemlock sawfly in Southeast Alaska. Hemlock sawfly; Insect pests Alaska. A B. Figure 6.—Hemlock .sawfly mature cages consumed an average of 82. 38 SE i- 1 3. 74 needles per larva. An F test showed no significant difference at the 5-percent level between single and group-reared larvae in needle consumption per individual. In addi- tion, a chi-square test indicated no significant difference in percent sur- vival between single and group- reared larvae. Therefore, group feeding has no apparent survival value over soli- tary feeding. Incidence of parasitiza- tion or predation of sawfly larva
. The hemlock sawfly in Southeast Alaska. Hemlock sawfly; Insect pests Alaska. A B. Figure 6.—Hemlock .sawfly mature cages consumed an average of 82. 38 SE i- 1 3. 74 needles per larva. An F test showed no significant difference at the 5-percent level between single and group-reared larvae in needle consumption per individual. In addi- tion, a chi-square test indicated no significant difference in percent sur- vival between single and group- reared larvae. Therefore, group feeding has no apparent survival value over soli- tary feeding. Incidence of parasitiza- tion or predation of sawfly larvae could vary under the two types of feeding conditions, however. COCOON SIZE RELATED TO SEX Cocoon measurements indicate that size is a fairly reliable means of sexing sawflies within the cocoons. One hundred and fifty male cocoons had a mean length of SD — 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 Hard, John S; Schmiege, Donald C. [Portland, Or. ] : Institute of Northern Forestry, Pacific Northwest, Forest and Range Experiment Station, U. S. Dept. of Agriculture
Size: 1384px × 1805px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
