The cherry fly is one of the most dangerous wreckers living on fruit-trees. She lays the eggs in fruits of sweet cherries and cherries. After a while from eggs there are larvae which begin to eat pulp. At first on fruits hollows and spots appear from behind it, and then they rot and fall down. At first sight everything looks sadly, but ways of fight against cherry fly exist.
Exterior and habits of cherry fly
The cherry fly is such insect of the small sizes, in total about 5 mm. She has dark-brown little body with four cross strips on wings. Guard, legs and head of fly of yellow color, and eye green.
There is cherry fly since the end of May until the end of June, in the south emergence begins somewhere decade earlier. The fly begins to take off only when the soil gets warm and temperature exceeds 18 degrees. The greatest activity is shown in sunny and warm weather.
In two weeks after departure the cherry flies begin to lay eggs in only the ripening and green fruits — on one egg on fruit. In 10 days from eggs white larvae hatch. They eat pulp within 20 days, and then leave fruits and pupate, being in the soil at depth of 5 centimeters. At active development, the cherry fly is able to destroy 30% of fruits of cherry and 60% of fruits of sweet cherry.
Protection of harvest against cherry fly
In an amicable way it is necessary to think of protection of harvest even before planting of trees. In that case it is necessary to land early ripening grades of sweet cherry and cherry to which the cherry fly does not pay the attention. The bulk of eggs of female is postponed in fruits of late and average terms of maturing.
Dig over the soil in pristvolny circle on depth about 25 centimeters in the early spring. This action will destroy some part of the wintered lozhnokokon of fly. The procedure of digging-up can be repeated in the fall and in the summer, after okuklivaniye of larvae which could strike fruits.
Trees of sweet cherry and cherry of late and average grades can be sprayed with insecticides as prevention. It is necessary to do it in mass summer of insect. Do not forget to observe terms of application of insecticides that it would be possible to eat harvest without fear later.
The first processing is usually done at the beginning of mass departure of cherry fly, and the second 15 days later, but not late, than in 2 weeks prior to harvesting. At repeated sprayings it is desirable to alternate medicines. It will allow to prevent accustoming of fly to medicine. It is desirable to spray not only trees, but also the earth around them.
Folk remedies
Hang on branches of trees glue traps, or banks with some sweet liquid. All insects this way, of course, not to catch. It is possible to try to deceive cherry fly, having sprayed krone with infusion of wormwood, tobacco, garlic or onions. The unpleasant smell can frighten off insect.
Except cherry fly, it is necessary to struggle with cherry plant louse as it is the accompanying wrecker. Flies eat allocations of plant louse before laying eggs.
Harvesting
It is necessary to reap crop completely and quickly, but not to divide it into several stages. It is impossible to leave already damaged fruits near trees or on trees at all. If to make it, then sooner or later larvae will creep out of fruits, will pupate in the soil, and in the spring will turn into flies again.
The damaged berry can be learned quite simply as it will be dark, soft, opaque. On it there will be hollows from the courses made larva. The damaged fruits should be collected and destroyed. For example, it is possible to dig them in the earth, from the fructifying trees at a great distance. To struggle with cherry fly it is necessary to begin in advance, otherwise all described means will hardly help.