ISSN:
1432-1939
Keywords:
Host-herbivore interactions
;
Water stress
;
Herbivory
;
Ponderosa pine
;
Pinus ponderosa
;
Diprionidae
;
Sawflies
;
Neodiprion autumnalis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Neodiprion autumnalis (Smith) larvae were caged for two successive years on root-trenched, watered, and untreated ponderosa pine (Pinus ponderosa Doug. ex Laws.) to determine effects of host moisture stress on larval feeding. Levels of moisture stress (as measured by the Scholander pressure chamber) differed significantly among treatment levels during 1984 and 1985 larval feeding periods. Differences in larval feeding success were not detected in 1984. In 1985, however, larvae on trenched (stressed) trees clipped and rejected more foliage, consumed more needles, had lower pupal weights, lower survival, and a longer feeding period than larvae on watered or untreated trees. Frass production did not differ among treatment levels. The length of the feeding period was shorter for larvae on watered trees than for larvae on untreated trees, but other measures of feeding success did not significantly differ between watered and untreated trees.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00378711
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