scholarly journals Effect of Abundance of the Navel Orangeworm on Sampling Range and Interference Between Pheromone Traps

2013 ◽  
Vol 42 (1) ◽  
pp. 143-149 ◽  
Author(s):  
Charles S. Burks ◽  
Bradley S. Higbee
Keyword(s):  
Pheromone Traps ◽  
Navel Orangeworm

scholarly journals Factors Affecting Disruption of Navel Orangeworm (Lepidoptera: Pyralidae) Using Aerosol Dispensers

2020 ◽  
Vol 113 (3) ◽  
pp. 1290-1298 ◽  
Author(s):  
Charles S Burks ◽  
Donald R Thomson
Keyword(s):  
Sexual Activity ◽  
Mating Disruption ◽  
Sexual Communication ◽  
Profile Analysis ◽  
Crop Protection ◽  
Spatial Density ◽  
Pheromone Traps ◽  
Sharp Drop ◽  
Navel Orangeworm ◽  
Factors Affecting

Abstract Mating disruption is used to help manage the navel orangeworm on approximately 200,000 ha of tree nut crops. Aerosol dispensers are the most common formulation, and all formulations use an incomplete pheromone blend consisting solely of (Z11,Z13)-hexadecadienal. Profile analysis (examination of capture and males in pheromone traps as a function of spatial density of dispensers) demonstrated a sharp drop of males captured with a very low density of dispensers, and then an approximately linear relationship between 90 and approaching 100% suppression. This near-linear portion of the profile includes both dispenser densities in which crop protection has been demonstrated, and densities in which it is unlikely. Suppression of males in pheromone traps was lost the next night after dispensers were removed, suggesting that the active ingredient was not persistent in the orchard environment. During most of the summer preharvest period, turning the dispensers off 1 or 2 h before the end of the predawn period of sexual activity provides the same amount of suppression of sexual communication as emission throughout the period of sexual activity. This suggests that encountering the pheromone from the mating disruption dispensers had a persistent effect on males. During the autumn postharvest period, only emission prior to midnight suppressed communication on nights on which the temperature fell below 19°C by midnight. These findings and the analysis will help manufacturers refine their offerings for mating disruption for this important California pest, and buyers of mating disruption to assess cost-effectiveness of competing offerings.

scholarly journals Evaluating Response of Mass-Reared and Irradiated Navel Orangeworm, Amyelois transitella (Lepidoptera: Pyralidae), to Crude Female Pheromone Extract

Insects ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 703
Author(s):  
Joshua Reger ◽  
Jacob Wenger ◽  
Gurreet Brar ◽  
Charles Burks ◽  
Houston Wilson
Keyword(s):  
Wind Tunnel ◽  
Sterile Insect Technique ◽  
Underlying Mechanism ◽  
Mass Rearing ◽  
Lower Proportion ◽  
Management Tool ◽  
Pheromone Traps ◽  
Amyelois Transitella ◽  
Navel Orangeworm ◽  
Lepidoptera Pyralidae

The navel orangeworm, Amyleois transitella (Lepidoptera: Pyralidae), is a key pest of almonds and pistachios in California. Larvae directly feed on nuts, reducing quality and yield, and adults can introduce fungi that produce aflatoxins. The development of sterile insect technique (SIT) is currently being explored as a management tool for this pest. Large quantities of A. transitella are mass-reared, irradiated, and shipped to California from a USDA APHIS facility in Phoenix, AZ. Preliminary field releases of sterile A. transitella from this facility resulted in poor recovery of males in pheromone traps, raising concerns that mass-reared male A. transitella may not be responding to pheromone from virgin females. In this study, a wind tunnel was used to evaluate the response of both irradiated and non-irradiated mass-reared A. transitella males to crude pheromone extract from females, and their performance was compared to two strains of locally reared non-irradiated A. transitella. While initial responses associated with pheromone detection where similar between mass-reared and locally reared moths, a lower proportion of the mass-reared moths ultimately made contact with the pheromone source. Surprisingly, the addition of irradiation did not further decrease their performance. While mass-reared moths respond to pheromone, their ability to locate and make contact with the pheromone source appears to be impeded. The underlying mechanism remains unclear, but is likely related to damage incurred during the mass-rearing and shipping process.

Employing pheromone traps to establish the distribution and seasonal activity of Theresimima ampellophaga in Turkey

2010 ◽  
Vol 38 (3) ◽  
pp. 217-222 ◽  
Author(s):  
Feza Can ◽  
Nihat Demirel ◽  
Erkan Isa Sağıroğlu ◽  
Teodora Toshova ◽  
Mitko Subchev
Keyword(s):  
Pheromone Traps ◽  
Seasonal Activity
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