EVALUATION OF TRAP COLOR AND HEIGHT PLACEMENT FOR MONITORING CIRCULIFER TENELLUS (BAKER) (HOMOPTERA: CICADELLIDAE)

1985 ◽  
Vol 117 (4) ◽  
pp. 505-511 ◽  
Author(s):  
D.E. Meyerdirk ◽  
G.N. Oldfield
Keyword(s):  
Ground Level ◽  
Sticky Trap ◽  
Optimum Location ◽  
Survey Tool ◽  
Beet Leafhopper ◽  
Circulifer Tenellus ◽  
Trap Color ◽  
Yellow Sticky Trap ◽  
Trap Catches ◽  
Opaque Plastic

AbstractThe beet leafhopper, Circulifer tenellus (Baker), was found to be significantly attracted to the color yellow. Yellow, opaque plastic cards coated with a sticky substance were shown to be an effective survey tool for monitoring adult beet leafhopper. Traps with different hues of yellow (wavelengths of 510 and 588 nm) showed no significant differences between trap catches. The commonest flight strata at a host site was at ground level, where significantly higher numbers of adults were trapped than at heights of 0.3, 0.6, 0.9, 1.5, 2.1, and 2.7 m above the ground. The ground level is the optimum location for a yellow sticky trap when monitoring C. tenellus.

DIURNAL PATTERNS IN YELLOW TRAP CATCH OF PEAR PSYLLA (HOMOPTERA: PSYLLIDAE): DIFFERENCES BETWEEN SEXES AND MORPHOTYPES

1993 ◽  
Vol 125 (4) ◽  
pp. 761-767 ◽  
Author(s):  
David R. Horton
Keyword(s):  
Sex Ratio ◽  
Life Stage ◽  
Sticky Trap ◽  
Trap Catch ◽  
Male Bias ◽  
Diurnal Patterns ◽  
Pear Psylla ◽  
Female Bias ◽  
Yellow Sticky Trap ◽  
Trap Catches

AbstractDiumal patterns in yellow sticky trap catch of pear psylla, Cacopsylla pyricola Foerster, are described for the spring (reproductive) winterform generation, summerforms, and the fall (diapausing/dispersing) winterform generation. For each life stage, trap catch of the two sexes is also compared, and sex ratios on sticky traps are contrasted with independent estimates of population sex ratio obtained by beat tray samples. Beat tray estimates of sex ratio showed a slight male bias for both winterform generations (although P = 0.09 for spring winterforms), and a female bias for the summerform samples. Sticky trap catches were significantly male biased for the reproductive generations (i.e. spring winterforms and summerforms). Trap catches of fall winterforms were not different from a 1:1 ratio. The male bias for the reproductive generations may be due to mate-seeking activities of males or to a decrease in activity by egg-laden females. Peak catch for summerforms occurred in the morning, and that of both winter-form generations occurred at midday. There was no evidence that trapping depleted local densities of psylla during a 24-h period.

scholarly journals Seasonal sex ratio of Bactericera cockerelli in potato and tomato crops in Hawkes Bay and Canterbury

2011 ◽  
Vol 64 ◽  
pp. 293-293 ◽  
Author(s):  
N.M. Taylor ◽  
N. Jorgensen ◽  
N.A. Berry ◽  
R.C. Butler
Keyword(s):  
Sex Ratio ◽  
Sticky Trap ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Management Tools ◽  
Yellow Sticky Trap ◽  
Trap Catches ◽  
Potato Crops ◽  
Increased Activity ◽  
Potential Use

Since its discovery in New Zealand in 2006 the tomato/potato psyllid (TPP) Bactericera cockerelli (Sulc) (Hemiptera Triozidae) has been regarded as a significant pest of solanaceous crops in the horticultural industry To date there is little knowledge of the population dynamics of male and female TPP in the field An understanding of these dynamics will aid in the potential use of traps as pest management tools During the 201011 growing season weekly yellow sticky trap catches were used to assess the malefemale sex ratio of TPP in a total of nine tomato and potato crops in Hawkes Bay and mid Canterbury More male TPP were caught on traps at all nine sites throughout the season Furthermore the TPP malefemale ratio was highest early in the season This malebiased dominance may suggest several things an uneven proportion of males compared with females in the population that male TPP are more attracted to the hue of yellow than females an increased activity by males as a consequence of matesearching behaviour and/or a decrease in activity by egglaying females

EFFECT OF COLOR ON STICKY-TRAP CATCHES OF PHOLETESOR ORNIGIS (HYMENOPTERA: BRACONIDAE), A PARASITE OF THE SPOTTED TENTIFORM LEAFMINER PHYLLONORYCTER BLANCARDELLA (LEPIDOPTERA: GRACILLARIIDAE)

1985 ◽  
Vol 117 (12) ◽  
pp. 1559-1564 ◽  
Author(s):  
R.M. Trimble ◽  
E.J. Brach
Keyword(s):  
Sex Ratio ◽  
Adult Population ◽  
Sticky Trap ◽  
Apple Orchards ◽  
Trap Color ◽  
Relative Attractiveness ◽  
Males And Females ◽  
Phyllonorycter Blancardella ◽  
Trap Catches ◽  
Pholetesor Ornigis

AbstractThe effect of trap color on sticky-trap catches of Pholetesor ornigis Weed was studied in experimental and commercial apple orchards during each of the parasite's 3 yearly activity periods during 1982–1984. Seven enamel and 5 fluorescent paints were compared in 8 trials. There was considerable between-trial variation in the percentage of the total number of P. ornigis caught on a trap of one color. Trap color had a significant effect on the total number of parasites caught. There were no consistent differences in the relative attractiveness of the different colors to males and females. During 1984, males comprised more than 75% of all parasites trapped during each of the 3 activity periods. The sex ratio of the adult population emerging in study orchards during 2 of these activity periods was approximately 1:1.

Dispersal of the sugar-cane scale Aulacaspis tegalensis (Zhnt.) (Hem., Diaspididae) by air currents

1972 ◽  
Vol 61 (3) ◽  
pp. 547-558 ◽  
Author(s):  
D. J. Greathead
Keyword(s):  
Sugar Cane ◽  
Laboratory Experiments ◽  
Sticky Trap ◽  
Research Station ◽  
High Humidity ◽  
Dispersal Mechanism ◽  
Large Numbers ◽  
Speed Up ◽  
Trap Catches ◽  
Aulacaspis Tegalensis

By means of sticky traps and a suction trap, it was demonstrated on a plot of sugar-cane at Kawanda Research Station, Uganda, that large numbers of crawlers of Aulacaspis tegalensis (Zhnt.) become airborne (up to 10/m3). The numbers increase with wind speed up to about 2·0 m/s and then remain constant, but are depressed by increasing humidity. In laboratory experiments, crawler survival was reduced by high temperatures (30°C) and low humidities (30% r.h.), but some individuals should survive the extreme conditions sometimes experienced if airborne from morning until evening. On hatching, crawlers move upwards and towards the light, but downwards in the dark; movement is inhibited by high humidity. These behaviour responses indicate hat the presence of crawlers in the air is not accidental but a dispersal mechanism. At Arusha Chini, an isolated sugar estate in Tanzania, sticky-trap catches downwind of a windbreak confirmed that airborne dispersal of crawlers is a major source of infestation. It is shown that air currents could have carried crawlers to Arusha Chini from a source on the Kenya coast, 260 km to the east.

scholarly journals Population Dynamics of Released Potato Psyllids and their Bacteriliferous Status in Relation to Zebra Chip Incidence in Caged Field Plots

Plant Disease ◽  
2016 ◽  
Vol 100 (8) ◽  
pp. 1762-1767 ◽  
Author(s):  
F. Workneh ◽  
L. Paetzold ◽  
A. Rashed ◽  
C. M. Rush
Keyword(s):  
Disease Incidence ◽  
Sticky Trap ◽  
Research Station ◽  
Zebra Chip ◽  
Sticky Traps ◽  
Monitoring Tools ◽  
Candidatus Liberibacter ◽  
Yellow Sticky Trap ◽  
Successive Generations ◽  
Field Plots

Potato psyllids vector ‘Candidatus Liberibacter solanacearum’ (Lso), the putative causal agent of potato zebra chip (ZC). Currently, sticky traps are the primary psyllid monitoring tools used by growers for making management decisions. However, the reliability of sticky traps in predicting psyllid numbers in potato fields has always been questioned. In 2013 and 2014, experiments were conducted in covered field plots at the Texas A&M AgriLife Research Station at Bushland to investigate the relationships among initial psyllid numbers, psyllids captured on sticky traps and their Lso status, and zebra chip incidence. Three densities of Lso-positive psyllids (5, 15, or 30/cage) were released under 2-week-old potato canopies with four replications in plot sizes of 7.6 to 9 m by 5 rows. Psyllids were released under the first plant in the center row and monitored weekly with a yellow sticky trap from the opposite end. Number of plants with zebra chip symptoms also was counted weekly beginning one month after infestation with psyllids. The total number of psyllids captured on sticky traps and disease incidence levels generally corresponded to the levels of psyllid density treatments (5 < 15 < 30), but the differences became more apparent toward the end of the experiments. Psyllid numbers in the different density treatments fluctuated more or less in synchrony over time, which appeared to reflect periodic emergence of new generations of psyllids. Initially, all captured psyllids tested positive for Lso. However, the proportions of psyllids testing positive declined dramatically after a few weeks, which suggested that the new generations of psyllids were devoid of Lso. Over all, less than 50% of captured psyllids tested positive for the pathogen. The decline in proportions of psyllids testing positive for Lso following successive generations has significant relevance to field situations and may partly explain why there are generally low percentages of Lso-positive psyllids under field conditions.

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