THE EFFECT OF MATING AND THE PRESENCE OF THE MALE AMBROSIA BEETLE, TRYPODENDRON LINEATUM, ON "SECONDARY" ATTRACTION

1970 ◽  
Vol 102 (7) ◽  
pp. 894-897 ◽  
Author(s):  
W. W. Nijholt
Keyword(s):  
Ambrosia Beetle ◽  
Trypodendron Lineatum ◽  
Secondary Attraction

AbstractThe "secondary" attraction occurring after log attack by the female ambrosia beetle, Trypodendron lineatum (Oliv.), and the reduction in attractiveness after males arrive on the log are not dependent directly on mating. The reduction seems to be associated with the males’ presence, which suggests that they produce a masking substance.

The Effect of Attack by the Ambrosia Beetle Trypodendron lineatum (Olivier) on Log Attractiveness

1966 ◽  
Vol 98 (1) ◽  
pp. 50-59 ◽  
Author(s):  
J. A. Chapman
Keyword(s):  
Solar Heating ◽  
Ambrosia Beetle ◽  
Trypodendron Lineatum ◽  
Secondary Attraction

AbstractThe effect of attack by the ambrosia beetle Trypodendron lineatum (Olivier) on log attractiveness was studied using "greenhouse" cages, in which solar heating causes release of odor-bearing air beneath glass-barrier traps. In all eight replicates of a test, attack by female beetles was followed by a marked increase in attractiveness of logs. This "secondary" attraction was strong within 2–3 days after attack, continued for many weeks if females remained alone, but disappeared following mating.

LINEATIN ENANTIOMER PREFERENCE, FLIGHT PERIODS, AND EFFECT OF PHEROMONE CONCENTRATION AND TRAP LENGTH ON THREE SYMPATRIC SPECIES OF TRYPODENDRON (COLEOPTERA: SCOLYTIDAE)

2000 ◽  
Vol 132 (6) ◽  
pp. 877-887 ◽  
Author(s):  
B.S. Lindgren ◽  
S.E.R. Hoover ◽  
A.M. MacIsaac ◽  
C.I. Keeling ◽  
K.N. Slessor
Keyword(s):  
Sex Ratio ◽  
Reproductive Isolation ◽  
Release Rate ◽  
Sympatric Species ◽  
Ambrosia Beetle ◽  
Flight Period ◽  
Trypodendron Lineatum ◽  
Temporal Separation ◽  
Baited Traps ◽  
Pheromone Concentration

AbstractThe effects of lineatin enantiomer ratios, lineatin release rate, and trap length on catches and the flight periods of three sympatric species of Trypodendron Stephens were investigated in field bioassays using multiple-funnel traps. The ambrosia beetle, Trypodendron betulae Swaine, was caught in similar numbers in baited traps and blank control traps, showing that this species does not respond to lineatin. Our results confirmed that Trypodendron lineatum (Olivier) is attracted only to (+)-lineatin. Trypodendron rufitarsus (Kirby) and Trypodendron retusum (LeConte) were shown to utilize lineatin and like T. lineatum were caught only when (+)-lineatin was present. These results indicate that lineatin does not govern reproductive isolation among these three species. There was no effect by (+)-lineatin release rate within the range tested. The flight of T. rufitarsus commenced earlier and ceased before the peak of the T. lineatum flight, suggesting that temporal separation may be an important component of reproductive isolation between these two species. The flight period of T. retusum was similar to that of T. lineatum. Host odours may aid in reproductive isolation of these two species. Enantiomer blend did not significantly affect sex ratio in any species; however, sex ratio differed among species, indicating that different species responded differently to the traps or that natural sex ratios differ. Catches of T. rufitarsus and T. retusum increased with trap length when pheromone release per trap was held constant and when release was held constant relative to trap length. Trap length and release rate did not affect sex ratio.

THE EFFECT OF MALE TRYPODENDRON LINEATUM (COLEOPTERA: SCOLYTIDAE) ON THE RESPONSE OF FIELD POPULATIONS TO SECONDARY ATTRACTION

1973 ◽  
Vol 105 (4) ◽  
pp. 583-590 ◽  
Author(s):  
W. W. Nijholt
Keyword(s):  
Volatile Substance ◽  
Trypodendron Lineatum ◽  
Ambrosia Beetles ◽  
Field Response ◽  
Secondary Attraction

AbstractThe strong attractiveness of logs infested with female ambrosia beetles, Trypodendron lineatum (Oliv.), to the flying population was sharply reduced after the addition of males. The field response of T. lineatum was greatly reduced when air from logs infested with attractive females was mixed with air passing over logs infested with both sexes. The findings suggest that females keep producing the attracting principle in the presence of males. Males appear to reduce secondary attraction by producing a volatile substance(s) which may be anti-aggregating or repellent in its effect.

Flight and Attack of the Ambrosia Beetle, Trypodendron lineatum (Oliv.) in Relation to Felling Date of Logs

1965 ◽  
Vol 97 (1) ◽  
pp. 42-57 ◽  
Author(s):  
E. D. A. Dyer ◽  
J. A. Chapman
Keyword(s):  
Douglas Fir ◽  
Ambrosia Beetle ◽  
Considerable Variability ◽  
Trypodendron Lineatum ◽  
Brood Rearing

AbstractLog preference of the ambrosia beetle, Trypodendron lineatum (Oliv.) (Coleoptera: Scolytidae), was studied by flight traps, attack density counts, and forced attacks, on 200 Douglas fir felled over a ten-month period. During heavy spring flights in late May, the beetles attacked logs from the August through January fellings, but not those cut February through May. At the end of the first brood-rearing period, parts of logs protected by plastic sheeting from earlier flights were attacked in this same pattern. Beetles confined on logs at different times attacked in essentially the same way as free beetles. It is concluded that felling date greatly influences subsequent attack. However, there was considerable variability in attack within groups of trees cut the same dates. Furthermore, attack on very short (1- and 3-foot) sections from the February fellings, when the corresponding logs were unattractive, showed that a factor other than time of felling also influenced log attractiveness. Some information was secured on flight and attack of other scolytid beetles in relation to felling date of logs.

ETHANOL AS THE PRIMARY ATTRACTANT FOR THE AMBROSIA BEETLE TRYPODENDRON LINEATUM (COLEOPTERA: SCOLYTIDAE)

1970 ◽  
Vol 102 (8) ◽  
pp. 985-995 ◽  
Author(s):  
Henry A. Moeck
Keyword(s):  
Anaerobic Treatment ◽  
Ambrosia Beetle ◽  
Repellent Effect ◽  
Trypodendron Lineatum ◽  
Low Concentration ◽  
Laboratory Bioassays

AbstractMethanol, acetaldehyde, and ethanol have been identified in extracts of attractive wood and bark. The attractancy induced by anaerobic treatment in both sapwood and phloem of conifers and broadleaf trees was characterized by ethanol as the most concentrated component. In laboratory bioassays, ethanol was attractive at low concentration to both sexes of Trypodendron lineatum (Olivier). Methanol and acetaldehyde, at the concentrations found, apparently play no role in attraction. Monoterpenes had a repellent effect on T. lineatum.

The aligning effect of light flicker on phototaxis of the ambrosia beetle Trypodendron lineatum (Olivier)

1968 ◽  
Vol 46 (3) ◽  
pp. 602-603 ◽  
Author(s):  
K. Graham ◽  
Isabelle A. Moeck
Keyword(s):  
Light Intensity ◽  
Ambrosia Beetle ◽  
Trypodendron Lineatum ◽  
Chemical Attractants ◽  
Light Flicker ◽  
Effect Of Light

A light which was flickered at approximately 5 cycles per second provoked a more direct guided response in the ambrosia beetle Trypodendron lineatum (Olivier) than did a steady source of the same intensity. Among the principal implications are those which concern the use of the beetles in bioassay of chemical attractants in which light is used as an opposing stimulus. The light intensity should be at least stabilized, and preferably flickered at an appropriate frequency.

AN EVALUATION OF THREE TRAPS AND TWO LURES FOR THE AMBROSIA BEETLE TRYPODENDRON LINEATUM (OLIV.) (COLEOPTERA: SCOLYTIDAE) IN CANADA, NORWAY, AND WEST GERMANY

1987 ◽  
Vol 119 (3) ◽  
pp. 273-280 ◽  
Author(s):  
J.A. McLean ◽  
A. Bakke ◽  
H. Niemeyer
Keyword(s):  
British Columbia ◽  
West Germany ◽  
Ambrosia Beetle ◽  
Trypodendron Lineatum ◽  
Baited Traps

AbstractMultiple funnel, Schlitzfalle, and drainpipe traps baited with Linoprax® or Biolure® semiochemical baiting systems for the ambrosia beetle Trypodendron lineatum (Oliv.) were evaluated in similar experiments in British Columbia, West Germany, and Norway. In British Columbia, the Biolure-baited traps caught more T. lineatum of both sexes than did Linoprax-baited traps. The Linoprax-baited traps caught more male T. lineatum in West Germany and Norway but fewer females than the Biolure system. Low percentages of female T. lineatum were often recorded at drainpipe traps.

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