Leptinotarsa beetles

Insect species Colorado potato beetle Leptinotarsa decemlineata 0.03... 

S)-3,7-Dimethyl-2-oxo-6-octene-l,3-diol (39) was recently identified as the aggregation pheromone of the Colorado potato beetle (Leptinotarsa decem-lineata), and synthesized by Oliver et al., starting from (S)-linalool [86]. An improved synthesis of (S)-39 by Mori is shown in Scheme 57 [87]. Enzymatic acetylation of ( )-2,3-epoxynerol (A) with vinyl acetate and lipase PS gave B together with C. The acetate B was converted to a multi-gram quantity of (S)-39 according to Oliver [86]. 

While the existence of a female produced sex pheromone in the Colorado potato beetle Leptinotarsa decemlineata has been the subject of controversy for many years (for a discussion see [368]) a male produced pheromone has... 

Scott IM, Jensen H, Scott JG, Isman MB, Arnason JT, Philogene BJR, Botanical insecticides for controlling agricultural pests Piperamides and the Colorado potato beetle Leptinotarsa decemlineata Say (Coleoptera Chrysomelidae), Arch Insect Biochem Physiol 54 212—225, 2003. 

Wyrostkiewicz, K., Wawrzyniak, M., Barczak, T., Aniszewski, T. and Gulewicz, K. 1996. An evidence for insectoside activity of some preparations from alkaloid-rich lupin seeds on Colorado potato beetle Leptinotarsa decemlineata Say), larvae of... 

The antennal olfactory receptor system in several phytophagous insects is very sensitive in the detection of the green odour components. In the Colorado beetle Leptinotarsa decemlineata, the threshold of response for trans-2-hexen-1-ol is circa 10b molecules per ml of air (17). In comparison, at 760 mm Hg and 20 C, 1 ml of air contains about 1019 molecules. The insects tested i.e., the migratory locust Locusta migratoria, the carrot fly Psila rosae (18), the cereal aphid Sitobion avenae (19), the Colorado beetle L. decemlineata (17), Leptinotarsa... 

Schutz, S., Weissenbecker, B. and Hummel, H. E. (1995). Impact of elevated atmospheric ozone on host plant finding of the Colorado beetle (Leptinotarsa decemlineata Say). Mededelingen van de Faculteit Landbouw Universiteit Gent 60 819-824. 

Another common type of dimethylalkane is the 2,X-, 3,X-, 4,X-, and 5-X dimethylalkane, where X is the second methyl-branch position and is separated from the first methyl-branch by an odd number of carbons. These dimethylalkanes usually occur as mixtures of isomers with 3,5,7,9 or 11 methylenes between the methyl branches. In the Colorado potato beetle, Leptinotarsa decemlineata, forty percent of the egg hydrocarbons were comprised of 2,X-dimethylalkanes, with the most abundant being 2,10- and 2,6-dimethyloctacosane (Nelson et al 2003). 

Nelson, D. R., Adams, T. S. and Fatland, C.L. (2003). Hydrocarbons in the surface wax of eggs and adults of the Colorado potato beetle, Leptinotarsa decemlineata. Comp. 

Hylemya spp. Fsila rosae Chilo suppressalis Myzus persieae Nephotettix einetieeps Tribolium oastaneum Spodoptera littoralis Cocoa Mirids Tetranychid mites Laspeyresia pomonella Leptinotarsa 10-lineata Adult Locusts Lucilia larvae adults Beetles in stored cereals... 

The activities of 4 ecdysteroids (20E 1-1, E 2-1, polB 2-6 and poststerone 2-11 ) have been compared after spraying on to the food (potato leaves) of the Colorado beetle, Leptinotarsa decemlineata [182], Surprisingly, poststerone gave a high level of toxicity. 

Leptinotarsa behrensi Harold (Coleoptera Chrysomelidae). Hypotheses on the origin and evolution of leaf beetles toxins. Chemoecology, 2001,11,107-112. 

The abundant natural compound linalool (3) is an attractant for the Colorado potato beetle (CPB), Leptinotarsa decemlineata. Two isomeric derivatives of linalool, (Z)-5-(1.5-dimethylhex-4-enyldiene)-dihydrofuran-2-one (4) and ( )-5-(1.5-dimethylhex-4-enyldiene)-dihydrofuran-2-one (5), were synthesized and were found to be moderate antifeedants against the CPB. A lactone derived from linalool strongly affected the properties of the original compound linalool, which is an attractant to the CPB. A similar effect is seen with the activity of either linalool (3) or 4-isobutyl-5-isopropyl-5-methyl-dihydrofuran-2-one (6) to aphids. Compared to linalool, the lactone reduced the total time the aphid spent on the leaf.16... 

The Colorado potato beetle, Leptinotarsa decemlineata, is one of the most serious pests of potato. Two-component blends of three chemicals, (Z)-3-hexenyl acetate, ( )-linalool, and methyl salicylate, are attractive to L. decemlineata when (Z)-3-hexenyl acetate is one of the components of the blend,45 but individual compounds are inactive. Low levels of (Z)-3-hexen-l-ol and ( )-2-hexen-l-ol can substitute for (Z)-3-hexenyl... 

Damaged leaf tissue e.g. Brassica oleracea (Brassicaceae), Dianthus caryophyllus (Caryophyllaceae), Ouercus rubra (Fagaceae), Aloe arborescens (Liliaceae), Musa acuminata, M. paridasiaca (Musaceae), Olea europaea (Oleaceae), Solanum tuberosum (Solanaceae), Vitis ninfera (Vitaceae) modified by male olfactory sensilla-specific, sphinx moth (Manduca sexto) glutathione S-transferase Colorado potato beetle Leptinotarsa decemlineata) attractant Gossypium hirsutum (cotton) (Malvaceae) [induced by beet armyworm] Mains domestica (apple) (Rosaceae)... 

Sphecid wasp Philanthus spp.) male territory marker, female attractant Reduced attraction of bark beetle (Pityogenes bidentatus) by pheromones diamondback moth Plutella xylostella) attractant Colorado potato beetle Leptinotarsa decemlineata) attractant Sphinx moth Manduca sexto) stimulated diamondback moth Plutella xylostella) attractant stimulates female polyphemus moth Anthera polyphemus male attractant release (oak leaf needed for mating)... 

Colorado potato beetle Leptinotarsa decemlineata) attractant Reduced attraction of bark beede Pityogenes bidentalus) by pheromones diamondback moth Plutella xylostella) attractant... 

The potato beetle (Leptinotarsa decemlineata) lives on Solanum species containing steroid alkaloids, which are tolerated, but not stored, by this species. The bruchid beetle Callosobruchus fasciatus predates... 

Colorado potato beetle (Leptinotarsa decemlineata) Bt var. tenebrionis... 

Evidence of the involvement of proctolin in the regulatory mechanisms of insect nerve-muscle systems has continued to grow and the remainder of this section discusses these more recent developments and their significance. Proctolin-like immunoreactive (PLI) neurons have been detected in the blowfly, Calliohora ervthrocephala (27) the Colorado potato beetle, Leptinotarsa decemlineata (28) and the fruitfly larvae, Drosophila melanomaster (29). In the blow fly, 80-90 neurons in the brain-suboesophageal complex were fo md to be PLI. The thoracic ganglia, by comparison, contained 100-130 PLI neurons, while the abdominal section had only... 

Repellent activity, which also respected as insecticidal activity, of T. vulgare was reported by Schearer [222]. The steam distillate of fresh leaves and flowers of tansy was found to be strongly repellent to Colorado potato beetles, Leptinotarsa decemlineata. It seems that this activity is related with essential oils. 

---