Colorado potato beetle - Leptinotarsa decemlineata Say. Class Insects - Insecta. Detachment Coleoptera, or Beetles - Coleoptera. Leaf beetle family - Chrysomelidae. Ecology and biology. Small beetles 9-12 mm long. The body is colored from dirty yellow to light yellow. Head with black spots. Elytra with black stripes. Common on nightshades. Dangerous potato pest. picture of poisoning.
Hemolymph is poisonous to invertebrates and vertebrates. In a house fly, when 1 μl of beetle hemolymph is injected, death occurs within 1 hour. Administration of lyophilized hemolymph to mice at a dose of medroxyprogesterone pills contracture of the abdominal muscles at the injection site, adynamia, and difficulty breathing. Before death, convulsions, rotational movements develop.
The heart stops in diastole. In rats, a progressive decrease in body temperature is observed until the moment of death. The electrolyte balance of plasma is disturbed in the direction of hyperkalemia and hypercalcemia. Chemical composition and mechanism of action of the poison. The active principle of the poison is a protein with a molecular weight. 55,000, named S-leptinotarzine. The hemolymph of the related species Leptinotarsa haldemani contains a toxin called p 1 - leptinotoxin-h. Leptinotarzin is not accumulated with food, but is a natural protein of the beetle hemolymph.
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The toxin is quite resistant to buy provera cheap of proteolytic enzymes, however, incubation with the body homogenate of the Colorado potato beetle completely inactivates it. Apparently, the body of the beetle has a detoxifying system. Leptinotarzine has an effect on neuromuscular transmission in vertebrates. In concentrations of 10. Under the action of leptinotoxin-h, fusion of vesicles and the formation of large membrane folds are observed in synaptosomes. In neurosecretory cells, a decrease in the number of secretory granules was noted. Apparently, the toxin stimulates the process of exocytosis.
On the other hand, adults and larva have aposematic coloration, which warns the predator about possible inedibility. The biological role of leptinotarzine remains to be elucidated. In any case, the combination of poisonous hemolymph with the presence of enzyme systems that effectively detoxify xenobiotics, including insecticides, largely explains its wide distribution. Caterpillars of some provera pills of butterflies (Lepidoptera) have poisonous hairs that protect them from enemies. Adult individuals containing toxic compounds in their body can also be poisonous.
