The Colorado potato beetle is a major pest in potato fields. Adults and larvae are voracious, they easily adapt to toxic substances, showing resistance to many means. If you do not take measures to combat them, you can be left without a harvest of potatoes in the fall. We will tell you why it can be so difficult to get rid of this invader.
First of all, in Russia, the Colorado potato beetle has no enemies in its natural environment. No animals or birds feed on striped insects. This is due to the accumulation of toxic alkaloids in their bodies, which are found in nightshade crops. In addition, the beetle was brought to us from another continent - from North America. With ships, he first accidentally ended up in Europe, and in the 40s of the last century from there he got to the territory of the USSR. Since then, he has taken root with us and every season brings summer residents and farmers a lot of problems. The beetle feeds on nightshade tops, especially loves potato bushes. The leaves are destroyed very quickly, leaving bare twigs. Plants in such conditions are not able to develop and bear fruit normally. The tubers are small and tasteless.
This species is very prolific. Females lay a large number of eggs, which attach to the underside of the leaves. Their number in one day can reach 80 pieces. In a year, this figure is sometimes from 500 to 1000 pieces. Therefore, the Colorado potato beetle multiplies at a rapid pace, capturing more and more territories. During the fight against it, it is recommended to use special preparations that kill not only adult insects, but also act on their eggs and larvae. Only then is there a chance to clear your site of the beetle, at least for a season.
Colorado beetles are able to survive in a variety of adverse conditions. They sometimes fall into a state of suspended animation, in which they easily spend up to 3 years. Although, their average life expectancy is only a year. After that, they wake up from hibernation and begin to actively reproduce again.This feature helps the pests survive the time of hunger and makes it even more difficult to destroy the population. Several pieces will still survive even if you carry out several treatments of the plantings with powerful drugs.
Winter frosts, typical for the middle zone and northern regions of the country, do not lead to the death of Colorado beetles. They climb deep underground and there calmly wait out the cold period at a depth of 25-50 cm, where they are not afraid of any chemical insecticides. In spring, when the snow melts and the sun begins to warm up, they again get out to the soil surface and feed on young shoots. At this time, it is recommended to already start using various methods of control, including the use of industrial insecticides, folk recipes and mechanical collection by hand.
The adults of the Colorado potato beetle have wings on their backs. With their help, they fly perfectly and are able to migrate long distances. Under favorable weather conditions, they fly tens of kilometers. This is another reason why getting rid of the winged invader becomes such a laborious process.
From the previous paragraph, it becomes clear that it is necessary to destroy the beetles simultaneously in all neighboring areas. If you have successfully dealt with this problem in your garden, then do not hope that the pests will not appear again soon. They will simply fly to your dacha from the neighbors' plot and you will have to do everything again. It will not be possible to get rid of this misfortune forever.
Fresh or rotted walnut leaves scare off pests well. In the fall, they need to be scattered throughout the site, and then dug up the garden. Plowing the land on the eve of a cold snap will eliminate a significant part of the insects, which did not have time to deepen enough in preparation for wintering. Throughout the winter, it is necessary to evenly scatter wood ash on the garden bed, which has a detrimental effect on leaf beetles and enriches the soil with useful vitamins (phosphorus, potassium).
In the spring, before sprouting, several pieces of raw potatoes or their skins should be put in glass jars (0.5-1 l). The vessels must be buried flush with the surface of the ground, evenly distributing them throughout the bed. Such traps should be checked periodically and pests trapped in them should be destroyed. You can lure and collect insects using this method even after harvesting.
During the growing season, you need to periodically inspect the tops, and in a timely manner to carry out manual assembly and destruction of pests. In addition to the pests themselves, their larvae must be removed. And if the beetles on the potato are visible well enough, then sometimes it is not easy to find the eggs. Insects usually debug them on the inside of the leaves.
Newborn cubs are much more dangerous than old individuals. They are able to destroy a large area of plants in just one day. Therefore, it is important to prevent their birth as much as possible.
In gardening and horticulture, as well as in medicine, it is better to prevent the development of the disease than to waste time and energy on their treatment. This effect can be achieved by observing some of the rules for growing crops:
1. All work of the preventive plan, typical for a particular season, must be carried out on time.
2. When choosing varieties of plants for planting in your summer cottage, priority should be given to those species that are more resistant to diseases and pests.
3. All garden plantings that have been mechanically stressed or have undergone the pruning process must be treated with a special solution for protection.
4. An important condition for the normal growth and development of all horticultural crops is their proper and nutritious nutrition, since in some cases an insufficient amount of moisture and fertilizers can manifest itself as various signs of disease.
5. The resistance of plants to the effects of unfavorable factors to diseases can be increased by carrying out correct agrotechnical work:
It is impossible to name the exact timing of the start of the etching of the culture. It all depends on the region of cultivation and weather conditions. For germination, potatoes are taken out of pits and cellars 30-45 days before planting in the ground. And pre-sowing dressing is carried out 2-3 days before planting in the ground. But if you do the treatment just before planting, it will not be a violation.
The main criteria for planting the main vegetable for us, which should be guided by, is the temperature and moisture of the soil. Soil temperature by this time should be + 7 + 8º at a depth of 10-12 cm, and humidity not more than 75%.
In nature, there are a large number of harmful garden bugs. They can be conditionally divided into two groups:
Many summer residents call forest bugs green garden bugs. The size of an adult reaches a length of up to 1.5 cm. The bright green body has slightly noticeable notches at the edges. Forest beetles breed in places of feeding so that larvae hatching from eggs do not have to look for food for a long time. The female lays about a hundred eggs, attaching them very tightly to the stems of plants. After 1.5 weeks, larvae appear from them, which turn into adults within 30 days.
Green bugs live on trees. Wildlife and parklands are their main source of food. However, very often such garden bugs can be found in the garden and vegetable garden. First of all, the pest attacks the raspberry bushes, there may also be bedbugs on the currants. Buckthorn and herbaceous plants do not disdain.
Garden cruciferous bug or northern eurydema is one of the most dangerous pests, the body size of which does not exceed 8 mm. Its bright color and beautiful pattern on the back is very reminiscent of the appearance of a soldier's bug, but the size of the harm it causes is much more tangible. The insect's whiskers are covered with short hairs. Massive cruciferous fleas increase their population in hot weather, as a result of which they are able to destroy planted cabbage or other seedlings in just a few days.
Such garden bugs, plant pests, eat the leaves of radish, cabbage, radish and other vegetable crops. Insect attacks rarely survive any plantings.
This garden bug is known to many as the stink bug. The insect has a bright burgundy color. One of its distinguishing features is the unpleasant odor that it emits upon contact. The female is able to lay up to 400 eggs with a hard coating and yellowish hairs. The pest goes through 5 stages of development. Moreover, after the first two, his black body acquires a burgundy color, and the abdomen becomes yellow. The berry stink bug spends winter in the adult stage, and wakes up only in the middle of spring.
Garden berry bugs live mainly on shrubs. Bed bugs on raspberries or gooseberries eat not only the leaves of plants, but also the berries themselves, making them unsuitable for eating.
One of the smallest insects of this family, the black body of which does not exceed 3 mm. However, this does not prevent him from jumping well. The garden pest can not always be seen, since it settles mainly on the underside of the leaf plate. The plant parasite lays eggs in the second half of summer, remaining to winter in this form. The larvae that appeared in May settle on the lower part of the leaf. The garden bug is able to infect entire greenhouses by eating seedlings of cucumbers, bell peppers, eggplants and tomatoes.
Many are surprised by the appearance of this garden pest. The nondescript body of beige shades has lace edges, the pattern of which repeats the pattern of the back. An individual develops according to an incomplete type. Insects are very fertile - the female can lay up to 400 eggs. It will take about 4 weeks for the larva to become an adult.
By the name of this garden insect, one can determine its favorite habitats, they are pears, apple trees, apricots, plums and other fruit trees.
Another garden representative who is the worst enemy of agriculture. The pest bug is a relatively large insect, the body size of which reaches up to 13 mm. He was given this name because his color is very similar to the land turtle. Developed wings enable the insect to travel long distances. The life span of the pest is no more than 11 months. The plant bug reproduces very quickly - in one season the female manages to lay about 15 egg-laying.
The question of what garden bugs of this species eat will arise for everyone who finds a similar individual in their garden.
Due to the fact that the insect feeds on cereals, it does not pose a danger to horticultural crops. But the harmful turtle can cause colossal damage to cereal plantations. However, in the absence of familiar food, the pest can easily replace it with garden seedlings located nearby.
If the foliage begins to curl at the tomato seedlings, then first of all you need to pay attention to the frequency and abundance of watering, as well as the temperature in the room. As a rule, if you adjust the watering regime and place the seedlings in a place with a suitable temperature and lighting, then the leaves will soon straighten.
As a rule, if you adjust the watering regime and place the seedlings in a place with a suitable temperature and light, then the leaves will soon straighten.
If the plants are watered correctly, and the temperature and lighting are optimal, then the reason is most often a lack or excess of nutrients. In this case, you need to start feeding the seedlings correctly. If the air in the room is excessively dry, then the foliage will need to be systematically moistened from a spray bottle with water at room temperature.
Tomatoes affected by a viral disease or tomato bacteriosis should be dug up and destroyed as soon as possible. For all the remaining bushes, a preventive treatment with a special preparation is carried out. If pests have settled on the bushes, then they should be sprayed with an insecticidal solution.
If the leaves are curled due to the fact that the root system has become very cramped in the container in which the seedlings grow, then they can be helped in two ways:
Today, breeders are trying to create varieties that are as resistant to any negative factors as possible. The same goes for the potato beetle. In order not to have to pick the larvae by hand or handle with hazardous chemicals, it is enough to plant insect-resistant root crops.
As a rule, these are plants with dense, coarse leaves covered with hairs. At the slightest damage to the shoots, the plant quickly regenerates without consequences for the yield. For this purpose, the following varieties are used:
There are separate varieties of potatoes that are more resistant to Colorado potato beetles.
What kind of struggle to choose, each owner decides for himself. But we can say with confidence: you need to fight the beetle and find it on time at the plantings. This will save your harvest and reduce the chances of intruders the next year.