Colorado potato beetle , Leptinotarsa

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... 

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. 

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... 

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. 

S)-3,7-dimetliyl-2-oxo-fi-octcne-1,3-diol Colorado potato beetle (Leptinotarsa ifecemlineata) A ji7yinatic acctylaiion of epoxinerol [I77 ... 

S)-U- Dihydroxy-3,7- dimethyl-6-octen- 2-one Yxx Colorado potato beetle (Leptinotarsa decemlineala) MA Li pase-catal yzed asymmetric acetylation of ( >-2,3-epoxynerol [203]... 

Differences in the transport and metabolism do not seem to play an important role in tebufenozide s lack of toxicity to coleopteran species. Studies in which a highly susceptible caterpillar species (Spodoptera eridania) and a non-susceptible larval beetle species (Mexican bean beetle, Epilachna varivestis) were fed equal amounts of Relabelled tebufenozide showed surprisingly similar patterns of tebufenozide uptake, metabolism, and overall tissue distribution (13). The minor differences observed in this study were clearly insufficient to account for the greater than 2,800-fold difference in tebufenozide susceptibility between these two species (LC50 = 0.7 ppm for Spodoptera, >2,000 ppm for Epilachna) (12). Studies comparing beet armyworm (Spodoptera exigua) with Colorado potato beetle (Leptinotarsa decemlineata) yielded similar results (15). 

---