David R. Gillespie

Summary 1. Dicyphus hesperus Knight (Heteroptera: Miridae) nymphs were fed from egg hatch to the adult stage on Ephestia kuehniella eggs provided either alone or in combination with tomato leaves or with a supplementary water source. 2. Only 6% of individuals completed nymphal development on a diet of eggs alone. In contrast, a high proportion of nymphs completed development on a diet of eggs when either tomato leaves (97%) or a supplementary water source (88%) were provided. 3. The development times of nymphs given access to leaves were significantly shorter than those of nymphs given access only to supplementary water. 4. Adult female D. hesperus that were given access to tomato leaves prior to feeding trials consumed significantly more eggs in a 4‐h period than females that were dehydrated before trials. Dehydrated females that were allowed access to water for 3 h before trials consumed an intermediate number of eggs. 5. Plant feeding or access to some other water source is required for prey feeding, growth, and development in D. hesperus , and acquisition of water is proposed as a primary function of plant feeding. In addition, D. hesperus derives nutrients from plant feeding that increase the rate of nymphal development, although nymphs cannot complete development when provided only with tomato leaves. 6. Three simple models are presented of feeding behaviour in predatory Heteroptera where the amount of plant feeding either decreases, increases, or is constant as a function of the amount of prey feeding. The models are discussed with reference to the results and the probable multifunctional nature of plant feeding in predatory Heteroptera.

Journal Article Spectral Responsiveness of Frankliniella occidentalis (Thysanoptera: Thripidae) Determined by Trap Catches in Greenhouses Get access R. S. Vernon, R. S. Vernon Agriculture Canada Research Station, Vancouver, British Columbia V6T 1X2 Canada Search for other works by this author on: Oxford Academic PubMed Google Scholar D. R. Gillespie D. R. Gillespie 1 Agriculture Canada Research Station, Vancouver, British Columbia V6T 1X2 Canada 1Agriculture Canada Research Station, P.O. Box 1000, Agassiz, B.C. V0M 1A0 Canada. Search for other works by this author on: Oxford Academic PubMed Google Scholar Environmental Entomology, Volume 19, Issue 5, 1 October 1990, Pages 1229–1241, https://doi.org/10.1093/ee/19.5.1229 Published: 01 October 1990 Article history Received: 21 August 1989 Accepted: 20 April 1990 Published: 01 October 1990

Journal Article Trap Catch of Western Flower Thrips (Thysanoptera: Thripidae) as Affected by Color and Height of Sticky Traps in Mature Greenhouse Cucumber Crops Get access David R. Gillespie, David R. Gillespie Search for other works by this author on: Oxford Academic PubMed Google Scholar R. S. Vernon R. S. Vernon Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 83, Issue 3, 1 June 1990, Pages 971–975, https://doi.org/10.1093/jee/83.3.971 Published: 24 September 2014 Article history Received: 04 May 1989 Accepted: 26 September 1989 Published: 24 September 2014