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The Colorado potato beetle is one of the most voracious crop pests.
Possessing a great ability to restore the population size, it is able to occupy large areas and cause irreparable damage, first of all, to potatoes.
Various poison from the Colorado potato beetle is ineffective, since the pest develops immunity very quickly.
To effectively deal with a voracious beetle, you need to know the developmental cycle and lifestyle of an ineradicable insect.
- Description of the harm
- Colorado potato beetle clutches and control
- Modern poison against the Colorado potato beetle
Description of the pest
At the beginning of the 19th century, during the exploration of Mexico, a beetle was discovered, with black stripes on a red - yellow background. On each of the elytra there were five stripes, for which the beetle was named ten-line.
On the territory of Mexico, in conditions of a limited number of edible plants, the beetle adapted to eat poisonous leaves of tobacco and wild nightshade and had no competitors in the fight for food.
And since the poisonous alkaloids, solanines, contained in these cultures, accumulated in the tissues of the beetles, he also had almost no natural enemies that eat the beetle.
With the development of Mexico, the pest entered the American states of Arizona, Texas, and Nebraska. Here the pest got the opportunity to feed on potato plantings. The abundance of food was the impetus for the growth of the population. They started talking about the beetle when, in 1859, a myriad of them destroyed the potato planting in Colorado.
Over the next five years, the pest managed not only to spread throughout North America, but also to cross the ocean on merchant ships and end up in Europe.
European agronomists still managed to cope with the first pockets of defeat, but when the First World War was going on in Europe, the situation got out of control. The beetle adapted to the new climatic conditions and began to reproduce successfully on European ones. It should be said that the insect hibernates in the soil at a depth of 30 cm. In cold winters with little snow, its population may decrease due to freezing of the soil.
A feature of the insect is the ability to endure adverse conditions in a state of diapause - a kind of hibernation, in which it can spend up to three years without leaving the surface. In the temperate climate of most Russian regions, the Colorado potato beetle gives one or two generations per season, in the southern regions - up to four.
Colorado potato beetle clutches and control
Clutch of eggs is made on the underside of leaves of nightshade crops:
As soon as the larvae emerge from the eggs, they immediately begin to eat the leaves, right up to pupation, and when a beetle emerges from the pupa after 10 days, it also continues to eat plants.
Video on how to get rid of the Colorado potato beetle:
It is completely impossible to defeat the Colorado potato beetle by mechanical destruction of the beetle and its clutches, a change in crop rotation, a large gap in the fields with nightshade crops, and the colonization of fields by predatory insects.
Here either genetics and genetic engineering or poisonous pesticides and biologicals come to the rescue.
Modern poison against the Colorado potato beetle
The drug Bankcol
In the fight against the Colorado potato beetle and its larvae, the drug Bankol, based on the substance of bensultan, has proven itself well.
The action of Bancol is based on neurotoxic damage to larvae and adults. Beetles on treated plants lose interest in food, become inactive, unable to stay on the plant and fall off it.
The drug in the recommended doses is non-toxic to bees, fish and warm-blooded animals. Bankcol acts both in direct contact and accumulating in plant leaves, causing the death of insects.
Therefore, as soon as the larvae appear from the eggs and begin to feed on the treated plant, they die almost immediately.
This effect lasts 15 days. The drug is recommended to be used on potato plantings twice a season.
A contact insecticidal drug that causes a disruption in the functioning of the beetle's nervous system, resulting in paralysis.
The drug spreads to all parts of the plant, making them dangerous for the beetle and its larvae to eat. The effect of mospilan is manifested even on unprocessed parts of potatoes and other plants.
The drug Decis Profi
One of the most effective drugs with minimal toxicity to humans, fish, birds, animals.
An hour after treatment, it causes the death of the Colorado potato beetle, disrupting the conductivity of cell membranes and blocking these passage of nerve impulses. The effectiveness lasts for two weeks.
It causes almost instant death of the Colorado potato beetle and its larvae. The undoubted advantage of the drug is its stability during precipitation.
On potato plantings, it is recommended for double use no later than 20 days before harvesting.
In addition to the above means against the Colorado potato beetle, you can use other pesticides:
Whatever poison is used against the Colorado potato beetle, it is important to follow the instructions for use and safety measures when storing the product and processing it plantings of nightshade crops.