Comparison of Two Sex Pheromone Trap Designs for Monitoring Corn Earworm and Tobacco Budworm (Lepidoptera: Noctuidae)

1994 ◽  
Vol 87 (3) ◽  
pp. 793-801 ◽  
Author(s):  
J. D. Lopez ◽  
J. L. Goodenough ◽  
K. R. Beerwinkle
Keyword(s):  
Sex Pheromone ◽  
Pheromone Trap ◽  
Corn Earworm ◽  
Tobacco Budworm ◽  
Lepidoptera Noctuidae

The influence of behaviour modifying chemicals on mating success of the red bollworm Diparopsis castanea Hmps. (Lepidoptera, Noctuidae) in Malawi

1976 ◽  
Vol 66 (2) ◽  
pp. 279-300 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Sexual Attraction ◽  
Practical Method ◽  
Pheromone Trap ◽  
Cotton Field ◽  
Field Cage ◽  
Synthetic Sex Pheromone ◽  
Trap Catches ◽  
First Time ◽  
Lepidoptera Noctuidae

AbstractThe synthetic sex pheromone (dicastalure) of the red bollworm of cotton, Diparopsis castanea Hmps., in Central and Southern Africa, and an inhibitor of male sexual attraction (trans-9-dodecenyl acetate,=IIA), were used in an enclosed 0·2 ha cotton field-cage to reduce successful female matings. Over one month dicastalure at 21·0 and 42·3 g/ha produced average reductions in mating of 47·9% and 72·5% respectively and 37·9 g IIA/ha produced an overall reduction in mating of 71·5%, or 79·5% in released moth populations, over the same period. The proportion of virgin females present in disruption situations was significantly greater than in untreated populations and was density-independent for moth populations of up to 2 200/ha. The proportion of fertile eggs in disruption situations was correspondingly reduced to 30·2% from an average of 67·9% in control cycles. Reduction in sex pheromone trap catches is an unsatisfactory indicator of the extent to which males are prevented from inseminating females and considerably over-estimates the true degree of disruption. This is the first time that a naturally occurring inhibitor has been used successfully to disrupt mating in a field population of insects and it indicates the potential of the method for the control of high density pest populations in cotton. However, use of polyethylene dispensing mechanisms similar to those used in the field-cage disruption experiments would be unsuitable as a practical method of dispensing behaviour modifying chemicals and it is suggested that, for suitably controlled release of such chemicals, currently available microencapsulation technology offers the best prospects.

The influence of pheromone trap design and placement on catch of the red bollworm of cotton Diparopsis castanea Hampson (Lepidoptera: Noctuidae)

1978 ◽  
Vol 68 (1) ◽  
pp. 31-46 ◽  
Author(s):  
R. J. Marks
Keyword(s):  
Sex Pheromone ◽  
Ground Level ◽  
Pheromone Trap ◽  
Trap Design ◽  
Baited Traps ◽  
Significant Difference ◽  
Cotton Fields ◽  
Monitoring Traps ◽  
Monitoring Trap ◽  
Lepidoptera Noctuidae

AbstractThree suitable sex pheromone trap designs for trapping the red bofiworm of cotton, Diparopsis castanea Hmps., including a simple omnidirectional monitoring trap, are described. In trials in Malawi, Diparopsis was more readily trapped on open horizontal trapping surfaces (water or adhesive) than in enclosed types of traps. The presence of a roof above the trapping surface, at spacings of up to 20 cm, significantly reduced catches. White traps, or unpainted traps in the case of vane traps constructed from galvanised metal, caught more moths than traps of other colours. Catches were greatest when monitoring traps in cotton were placed at ground level or at a height of 0·5 m and, when dicastalure was released from polyethylene vials, by employing a trap 60 cm in diameter. Evidence was obtained that competition may exist between female-baited traps spaced up to 73 m apart, although catches in traps baited with dicastalure were not significantly different when traps were 40–60 m apart. The greatest catches of moths in cotton were in traps located in insecticide-sprayed fields, but moths were also trapped in considerable numbers in other crops and to a reduced extent in open areas 4·8 km from the nearest cotton. From about the end of February, catches in maize, groundnut and fallow areas frequently exceeded the catches recorded within cotton fields, which may indicate an increased dispersal flight from cotton by adult moths later in the season. Weekly replacement in monitoring traps of polyethylene vials containing dicastalure produced maximum moth catches, but there was no significant difference in catch between traps in which pheromone was replaced at intervals of 2, 3, 4 or 6 weeks.

SEASONAL CAPTURES OF BOLLWORM AND TOBACCO BUDWORM (LEPIDOPTERA: NOCTUIDAE) MALES IN PHEROMONE-BAITED TRAPS IN LOUISIANA

1989 ◽  
Vol 24 (1) ◽  
pp. 107-116 ◽  
Author(s):  
B. R. Leonard ◽  
J. B. Graves ◽  
S. Micinski ◽  
E. Burris ◽  
K. Ratchford ◽  
...  
Keyword(s):  
Heliothis Zea ◽  
Pheromone Trap ◽  
Tobacco Budworm ◽  
Seasonal Abundance ◽  
Cotton Production ◽  
Damage Potential ◽  
Baited Traps ◽  
Heliothis Spp ◽  
Lepidoptera Noctuidae ◽  
Early Harvest

Pheromone traps baited with synthetic sex lures of the bollworm, Heliothis zea (Boddie), and the tobacco budworm, Heliothis virescens (F.), were monitored over an eight-year period (1980–1987) in Louisiana. The total number of Heliothis spp. males captured in traps was observed to be highest during August and September. Seasonal totals indicated that the number of bollworms exceeded the number of tobacco budworms collected during each year of the study. Pheromone trap captures of tobacco budworms demonstrated a bimodal pattern of occurrence with peaks during June and September. The number of tobacco budworm males collected for August and September represented a greater percentage of the total Heliothis spp. population than was observed earlier in the season. These data also indicate that the seasonal abundance of the tobacco budworm has increased during the period 1984–1987 which emphasizes the importance of early harvest in cotton production by decreasing the damage potential of both Heliothis spp. during September.

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