Abstract
The pea leaf weevil, Sitona lineatus, is an important pest of field peas and faba beans worldwide. Present sampling techniques that rely on detection of adult feeding damage are labor intensive, time consuming and require repeated sampling. Semiochemical-based pest monitoring systems could improve pea leaf weevil management. This study, which was conducted in the Golden Triangle region of Montana, tested several factors that potentially might affect capture rates of pheromone-baited traps, including trap and lure type and trap placement. Pheromone-baited pitfall and ramp traps caught significantly more adults than ground or delta traps, in all study areas. Pitfall traps baited with gray rubber septa captured significantly more adults than traps baited with membrane formulations or controls in both pea and lentil fields. In addition, pheromone-baited pitfall traps positioned in the southern part of pea fields captured relatively higher numbers of adults than those placed in northern parts of fields, although this difference was not significant. These findings can be used to improve adult weevil monitoring and should be taken into consideration when developing an integrated pest management program.
Highlights
Field pea, Pisum sativum (L.) (Fabales: Fabaceae), is a significant pulse crop worldwide, and in the United States, 0.5 million hectares were planted in 2017 [1]
Regardless of experimental site, more S. lineatus adults were caught in traps baited with pheromone lures than in control traps (Figure 3)
This study shows that trap design, lure type, and trapping location are all important features that affect the response of S. lineatus adults to pheromone-baited traps
Summary
Pisum sativum (L.) (Fabales: Fabaceae), is a significant pulse crop worldwide, and in the United States, 0.5 million hectares were planted in 2017 [1]. The pea leaf weevil, Sitona lineatus (L.) (Coleoptera: Curculionidae), is a major pest of field peas and faba beans, Vicia faba (L.) (Fabales: Fabaceae), worldwide. This weevil is believed to be of European origin, but has spread to most field pea regions of the world, including Asia, Africa and North America, over the last 50 years [4,5,6,7]. In North America, this pest was first reported in 1936 by Downes [8]
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