A single caterpillar can damage several fruits (2-3), crawling from one to another. Nutrition lasts about a month. As a result of damage to the ovary, apples usually fall along with the caterpillars. Some of the caterpillars creep out of the scavenger and rise to the crown, where it again penetrates the fetus, the other part goes to pupation in the soil. With later damage to already ripened apples, the moth moves to damage the commercial quality of the fruit. Such damaged apples cannot be stored for long.
To effectively combat the codling moth, as indicated at the beginning of the article, it is very important to monitor the development phases of this pest. With the timely establishment of these phases, you can do with a minimum number of sprayings or other activities.
Along with the control and summation of effective temperatures, there is an even simpler way to determine the phases of development of the codling moth, which consists of the following. In autumn, caterpillars of caterpillars crawled into the hunting belts are harvested and placed in a jar with wet sawdust. The jar is stored in the barn until spring. In the spring, the jar is covered with gauze and put into the garden under a canopy. At the same time, they monitor the time of departure of butterflies.
The departed butterflies are carefully planted from the jar into a gauze sleeve, worn on a branch with fruits, where they continue to observe the beginning of the laying of eggs and the emergence of the caterpillars. These observations are the most reliable and allow you to determine the best dates for fighter events. It should be borne in mind that some of the pupae remaining in the bank, from which the butterflies did not fly out, do not need to be destroyed. A little later, small parasite insects will appear from them – an egg-eater trichogram. They can be released into the garden, thereby ensuring the biological protection of the fruit from the pest.
Key control measures
To destroy wintering caterpillars, it is necessary to clean the bark, plant debris, scalding boiling water with apples and containers from under apples, digging the soil. At night, in the crowns of apple trees, hanging jars with roaming lures (1/3 full liter jar).
The bait recipes are as follows. Take 600-700 grams of apple apples or 100 g of dried fruit, pour 2 liters of water and boil for about 30 minutes, then add 0.5 liters of whey, 0.5 liters of bread kvass, 20-25 g of yeast, 250 g of sugar and put in a warm place. The bait is ready when the liquid begins to ferment.
Another recipe: 200-300 grams of rye bread crusts, 3-5 slices of sugar and a little yeast are put in a three-liter jar, poured with water, covered with gauze and put the jar in heat. After 1-2 days, the composition is ready. The liquid is drained, and again bread and sugar are put into the sediment, water is poured. Fermented grounds are diluted with water and used as bait.
Cans, so that they do not accidentally get daytime beneficial insects, hang out for the butterflies the codling moths only in the evening. In the morning, the cans are removed, the butterflies that have fallen out of them are taken out, the bait mixture is poured into a closed container and stored in a cool place until evening. In the evening, liter jars are again filled with this mixture and hung out in the crowns of trees, and such an event is held daily.
A trichogram should be acquired at the plant protection stations of the parasite of the apple codling moth and its release into the garden. During the mass appearance of caterpillars, spray the apple trees with an infusion of wormwood, a decoction of the tops of tomato, milkweed, yarrow, delphinium, burdock, chamomile, tansy several times after 5 days. 15-20 days after flowering of winter varieties or, if pest development is monitored or effective temperatures are controlled, a week after the start of egg-laying, apple trees should be sprayed with malathion (75-90 g per 10 l of water), phytoverm (2 ml per 10 l of water), lepidolite (20-30 g per 10 l of water). The second treatment with these drugs is carried out after 10-14 days.
Scavenger should be collected daily. Make the obligatory lining of hunting belts on trunks and supports low from the ground and at the time when the scavenger is collected (the belts are removed and destroyed after harvesting).
Special pheromone traps for butterflies are hung out in tree crowns at a height of 1.5-2 m. To scare away butterflies, moths from young trees of apple trees plant tomatoes near them.
In conclusion, it should be said that the apple codling moth is a very dangerous pest, which in separate years favorable for its development (cold winter, warm spring, hot, moderately humid summer) can destroy more than half of the fruits, and even more on young trees.
Therefore, the fight against this pest is required to be carried out annually. The success of the struggle very much depends on the implementation of the above measures in the phases of its development most vulnerable to the moth.