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Pityol is shown to be an aggregation pheromone component for P. carmeli and may also function as a synomone that decreases competition of P. setosus and as a kairomone for L. pertenuis. Expand
Endocrine regulation of de novo aggregation pheromone biosynthesis in the pine engraver, Ips pini (Say) (Coleoptera: Scolytidae)
Data support a sequence of events leading to feeding-induced de novo pheromone biosynthesis in male I. pini and suggest that in this pathway JH III does not influence enzymatically-catalyzed reactions subsequent to the conversion of 3-hydroxy-3-methylglutaryl-coenzyme A to mevalonate. Expand
An analysis of the larval instars of the walnut twig beetle, Pityophthorus juglandis Blackman (Coleoptera: Scolytidae), in northern California black walnut, Juglans hindsii, and a new host record for
Abstract By measuring and analyzing larval head capsule widths, we determined that a northern California population of the walnut twig beetle, Pityophthorus juglandis Blackman (Coleoptera:Expand
Wingnut (Juglandaceae) as a new generic host for Pityophthorus juglandis (Coleoptera: Curculionidae) and the thousand cankers disease pathogen, Geosmithia morbida (Ascomycota: Hypocreales)
The occurrence of both the WTB and G. morbida in three species of wingnut and the first occurrence of the polyphagous shot hole borer, a species near Euwallacea fornicatus Eichhoff (Coleoptera: Curculionidae), in Juglans are documented. Expand
Comparative morphometric and chemical analyses of phenotypes of two invasive ambrosia beetles (Euwallacea spp.) in the United States
The polyphagous shot hole borer (PSHB), Euwallacea sp., was first detected in 2003 in Los Angeles County, California, USA. Recently, this invasive species has become a major pest of many hardwoodExpand
Pitch canker kills pines, spreads to new species and regions
In infested regions, the planting of Monterey pine and other pine tree species should be undertaken with caution, and long-term management appears to be dependent on the development of resistant tree varieties. Expand
Trapping Failure Leads to Discovery of Potent Semiochemical Repellent for the Walnut Twig Beetle
The repellent effect of limonene may be valuable in the development of a semiochemical-based tool for management of P. juglandis and thousand cankers disease. Expand