Light Traps and Codling Moth Control

Vertical distribution of codling moth adults in pheromone‐treated and untreated plots

“…However, the mean height of observation for males was significantly (F = 4.05; df = 1,60; P < 0.05) lower in the pheromone-treated plot (2.50 + 0.09 m) than in the untreated plot (2.76 4-0.09 m). Hamilton & Steiner (1939) observed that light traps placed high in trees caught the greatest number of codling moths, while Howell (1981) found that most moths were caught in blacklight traps placed at midcanopy. The response of male codling moths to pheromone at various heights in an orchard is apparently not constant.…”

“…Codling moth activity (Borden, 1931;Spuler, 1927) and larval infestation of fruit (Richardson & Du Chanois, 1950) are often concentrated at the tops of trees. In addition, capture of codling moths in fermenting-bait traps (Yothers, 1927), lighttraps (Hamilton & Steiner, 1939), and pheromonebaited traps (Riedl et al, 1979;McNally & Barnes, 1981;Ahmad & A1-Gharbawi, 1986) increases with trap height in the orchard canopy. But a problem associated with use of pheromone-baited and fermentingbait traps is that they elicit a behavioral response by moths and may not accurately reflect distributional differences.…”

Incidence of Parasitoids Attacking Endemic Spruce Budworm (Lepidoptera: Tortricidae) Populations in New Brunswick

“…Large scale trapping of codling moth, Laspeyresia pornonella (Linnaeus), with toxic or nontoxic trunk bands, lure or bait traps, artificial light traps, rotary nets, and electric grids, although showing a measurable degree of population reduction, proved unsatisfactory for commercial control Machado 1937, 1943;Hamilton and Steiner 1939;Parrott and Collins 1935;Worthley 1934Worthley , 1937Yothers 1930). Large scale trapping of codling moth, Laspeyresia pornonella (Linnaeus), with toxic or nontoxic trunk bands, lure or bait traps, artificial light traps, rotary nets, and electric grids, although showing a measurable degree of population reduction, proved unsatisfactory for commercial control Machado 1937, 1943;Hamilton and Steiner 1939;Parrott and Collins 1935;Worthley 1934Worthley , 1937Yothers 1930).…”

Codling Moth Attractants

“…4 There was some controversy over the accuracy of l i g h t traps a s compared wlth b a l t traps i n r e f l e c t i n g the normal moth a c t i v i t y in an orchard. Hamilton and Steiner (1939) s t a t e d t h a t since lights a r t i f i c i a l l y stlmulate a c t i v i t y during hours when light 1s too weak for.nonna1 a c t i v i t y , l i g h t traps a r e good indicators of moth abundance but are l e s s informative than b a l t t r a p s a s t o normal f l i g h t a c t i v i t y . This is i n contrast t o the observations of Nel (1940) who s t a t e d t h a t while b a l t traps may give a reasonably good lndlcatlon of the numbers of moth i n f l i g h t , it does not accurately r e f l e c t the amount of ovipositlon taking place.…”