Effects of Naphthenic and Paraffinic Petroleum Composition at a Comparable Molecular Weight or Viscosity on Photosynthesis of Eureka Lemon Leaves1

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Abstract:

Experiments were conducted for the purpose of comparing the effects of naphthenic and paraffinic petroleum composition at comparable levels of molecular weight or viscosity on the apparent photosynthesis of Eureka lemon leaves. The procedures fol1owell were the same as those described in a prior report. At a deposit level comparable to that of a practical field dosage, no effects on photosynthesis were evident for the difference in paraflinicity at a molecular weight of 306 to 308 or a viscosity of 70. In the high range of oil deposit, indicative or the situation in oil-soaked tissue, initial inhibition or photosynthesis was about the same, but recovery was faster for plants treated with the naphthenic oil than for those treated with the paratfinie oil of comparable molecular weight or viscosity. The difference in rate of recovery associated with the difference in paraffinicity is greater for oils of com parable viscosity than for those of com- parable molecular weight.

Document Type: Research Article

Publication date: October 1, 1959

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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