The importance of trap type, trap colour and capture liquid for catching Dendrolimus pini and their impact on by‐catch of beneficial insects

Abstract

Dendrolimus pini can be a serious defoliator of pine trees in some European countries. The monitoring of this insect is important, but no single standardized capture technique exists for monitoring purposes. 2 A range of insect trap types (delta sticky, G-trap, Unitrap and cross-vane Unitrap), colours (green, red and white delta traps and yellow and green cross-vane Unitraps) and types of capture liquid (glycol and salt solutions) were tested to determine the most effective trap for D. pini monitoring. Trap colour (yellow and green) was also tested for beneficial Hymenoptera and Diptera. 3 The Unitraps and cross-vane Unitraps were the most effective trap types, but the latter trap that contained glycol solution was less effective than a dry trap. 4 Trap colour did not have any effect on the catches of D. pini, but yellow Unitraps captured more Diptera (Phoridae and Tachinidae) and Hymenoptera (Pteromalidae, Ceraphronidae and Braconidae) than green traps. In contrast, the egg parasitoid Telenomus tetratomus preferred green traps. Overall catches of beneficial insects were relatively low, except Phoridae. 5 The Unitraps are recommended for the efficient monitoring of D. pini unless other factors such as trap cost or remote monitoring locations justify the use of other traps.

The Effect of Trap Color on Catches of Monochamus galloprovincialis and Three Most Numerous Non-Target Insect Species

“…The results of our studies, and a wide range of available data [ 18 , 27 , 36 , 37 , 38 , 73 , 86 , 98 , 99 , 100 , 101 ] and references therein, indicate that the insect response to different colors is species- and sex-specific and depends largely on their host plants, but also on the coloration of the insects themselves (elytra and body). Our laboratory tests suggest that immature and mature beetles of M. galloprovincialis differ in their color preference; however, this finding should be verified in further studies.…”

Effect of Trap Type and Height on the Captures of the Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), in Pheromone-Baited Traps in Cotton

“…Our overall trap performance demonstrated that Delta traps provided similar results, but at certain periods of our monitoring season, red traps performed better than the white ones. Several studies have shown that trap color is a critical parameter that determines trap performance for many moth species [30,31,34]. For the pine processionary moth, Thaumetopoea pityocampa (Denis & Schiffermüller) (Lepidoptera: Thaumetopoeidae), it has been found that white-and yellow-colored traps were more effective for the capture of adults when these traps had been placed in pine trees [35].…”

Stratification of entomofauna in a fruit Agrosystem: A case study of a soursop orchard (Annona muricata L., 1753) in M'Brimbo, South Côte d’Ivoire

“…The abundance of collected insects is thus influenced by the color of the trap and its position. Some studies have shown that the effectiveness of colored traps lies in the ability of insects to detect them [23,24] . Also showed that yellow traps are more attractive to the majority of insects due to their trichromatic vision.…”