Douglas fir tussock moth

From fir (Abies sp., Pseudotsuga menziesii) forest sprayed aerially with 140 or 280 mg/ha to control Douglas-fir tussock moth effects evaluated in year of spraying and 1 year later... 

Some groups of entomopathogenic viruses are capable of causing severe epizootic diseases in insect populations. We consider these viruses excellent natural pest control agents if the host insects are destructive species. Natural epizootics of viral diseases are known to have terminated outbreaks of major forest pests, such as the nun moth in Europe and the Douglas-fir tussock moth in the United States. 

Shepherd, R.F., Ed. "Operational field trials against the Douglas-fir tussock moth with chemical and biological insecticides" Report BC-X-201, Pacific Forest Research Centre Victoria, B.C., 1980. 

The addition of an allylic group was reported in the synthesis of heneicos-6-en-ll-one, the sex pheromone of the Douglas fir tussock moth.67 This method was compared advantageously to the classical processes employing the toxic tin hydrides, with respect to the rates, yields, and chemoselectivity.68,69 Concerning the stereoselectivity however, no major difference exists between the conventional and sonochemical methods.70,71... 

Grant, G. G., Tracey, A. S. and Hulme, M. (1997). (Z)-6,( >8-I Icneicosadicne-11 -one Synergistic sex pheromone component of Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough) (Lepidoptera Lymantriidae)../. Chem. Ecol., 23, 19-34. 

Smith, R.G., Daterman, G.E. andDaites, G.D. (1975). Douglas-fir tussock moth Sex pheromone identification and synthesis. Science, 188, 63-64. 

Smith, R.G. (1976). Laboratory and field bioassay of the Douglas-fir tussock moth pheromone, (Z)-6-heneicosen-ll-one. Environ. Entomol., 5,1187-1190. 

We also hope to control Douglas-fir tussock moth, Orqyia pseudotsugata (McDunnough), by mating disruption. Studies dating from 1977 show that production of fertile eggs can be... 

Table II. Efficacy of mating disruption for low and high density Douglas-fir tussock moth populations. (Condensed from Sower, L. L Daterman, G. E. Sartwell, C. In "Management of insect pests with semiochemicals," E. R. Mitchell, ed. Plenum Press, New York, 1981.)...

Weak baits will attract few or no insects when low-density populations prevail, because of the bait s small active-space of attractiveness. Captures go up when pest numbers increase, simply because the increased numbers in flight increase the probability that some will intercept the active space of the monitoring traps. This approach to population monitoring has been successful as an early-warning system against approaching outbreaks of Douglas-fir tussock moth (Table IV). 

Table IV. Summary of Douglas-fir tussock moth population monitoring with pheromone-baited traps.

BrCl. Hydrolysis of lb to the acid and reaction with decyllithium results in 2, the sex pheromone of the Douglas fir tussock moth. 

Z)-6-hetieicosen-I]-one Douglas-fir tussock moth (Orgyia p.ieudotsuf ata) S Lewis acid induced C-O bond cleavage of a bicyclic ketal compound using AcCl-NaF [188] [189] ... 

Hie anions of 68 and 79 are then useful acyl anion equivalents, but in natural product syntheses they are far less popular than reagents containing two sulphur atoms54, particularly dithians55. The chemistry of dithians, e. g. 86 and 87 has been well explored and they have been used in the synthesis of many natural products . The synthesis56 of the Douglas-Fir tussock moth sex pheromone 88 is an example of the way a dithian 86 acts as an acyl anion equivalent in ketone syntheses. 

Tussock Moth NPV 1976 Douglas Fir Tussock Moth Larvae... 

Studies of the sex pheromone of the Douglas fir tussock moth required the synthesis of ( )-l,6-henicosadien-ll-one. Outline a synthesis of this ketone using (Q-5,10-undecadien-l-ol and 1-decanol as sources of all of the carbons. 

---