{'fraction_non_alphanumeric': 0.03505897771952818, 'fraction_numerical': 0.019003931847968544, 'mean_word_length': 5.081673306772909, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 3, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Studies of synthetic attractants of the Siberian moth Dendrolimus superans Butl. (Lepidoptera: Lasiocampidae).

The Siberian Moth Dendrolimus superans Butl. is a dangerous pest of coniferous forests in Siberia and the Far East. Regular large-scale outbreaks of the Siberian moth population are accompanied by an almost complete elimination of coniferous needles. The last mass outbreaks of the Siberian moth population were observed in western Siberia in 1953‐1955 (the total area affected by the pest was about 4 million ha). In the Kransnoyarsk kray (territory), mass outbreaks of the Siberian moth population were observed in the mid- to late 1950s (affected area, about 2 million ha) and 1992‐ 1997 (about 1 million ha). Local population outbreaks are observed in different parts of the species range every 10‐15 years [1, 2]. According to [2], the total area of coniferous forests exterminated in the early 20th century as a result of mass outbreaks of the Siberian moth population exceeds 15 million ha. Nevertheless, in spite of great economic importance, many aspects of the biology and ecology of the Siberian moth (e.g., population dynamics between the outbreaks, sexual and migration behavior, etc.) remain insufficiently understood. The vast range and inaccessibility of many habitats make it difficult to collect experimental material, monitor population dynamics, and predict outbreaks. The use of attractant traps can significantly improve the collection of experimental material. Sex pheromone was isolated from the Siberian moth females and found to attract male moths of this species [2]. However, the chemical structure of the Siberian moth sex pheromone has not yet been identified. Sex pheromones of almost all representatives of the family Lasiocampidae studied thus far are unsaturated linear compounds with 12 backbone carbon atoms ( C 12 compounds), including aldehydes, alcohols, and acetates [3‐6]. The major and minor components of the volatile female sex pheromone of the pine moth D. pini L., were identified as (Z,E)-5,7-dodecadienal and (Z,E)5,7-dodecadiene-1-ol, respectively [5, 7]. Because the pine moth is taxonomically close to the Siberian moth, it may be suggested that the sex pheromones of these species have similar chemical structures. This suggestion is supported by the finding of A.S. Rozhkov [2], who showed that in pine‐larch forests, cages with pine moth females attracted not only pine moth, but also Siberian moth males. We compared the efficiency of synthetic unsaturated C 12 aldehydes, alcohols, and acetates with respect to the attraction of male Siberian moths. The efficiency of the attractants was assessed electroantennographically and in behavioral tests. Imagoes from a laboratory population of the Siberian moth were studied. Pupae from a natural population collected in Novosibirsk oblast (region) were used as the original material. Moth caterpillars and imagoes were kept at a temperature of 21 ∠ 1iC and a relative air humidity of 70‐80%. Attractants. The two last abdominal segments of