On the country site you planted carrots, and here came it is time to reap a crop. But at the last minute your pleasure is replaced by chagrin as it is found out that all carrots are damaged by some wrecker. And it is already not suitable almost for the use. And call this wrecker a carrot fly.
For many gardeners - fans would be interesting to be recognized how to struggle with a carrot fly.
It meets almost everywhere in the European part. Especially significant damage causes in areas with moderately humid climate. Damages carrots, a celery, parsley and a parsnip. It is most dangerous to carrots grades like chasteners.
Affected root crops have an ugly appearance, is frequent with banners, with cross cracks, become tasteless, ligneous, unusable for use in food, at storage rot. Leaves get red-violet coloring, turn yellow and dry up. Strongly damaged plants perish
Fly 4-5 mm long, it is brilliant - black with a greenish shade. Larva light yellow, brilliant, 6-7 mm long. Eggs milky-white, oval. Larvae in a pupariya, in the soil at a depth of 6-15 cm, sometimes in a root crop winter.
Years of a fly begins at a temperature of soil of 15 - 17 degrees. In the southern areas it is the end of April - the beginning of May, in a midland it is May (during blossoming of an apple-tree and a mountain ash), in northern areas - June. The taken-off flies keep on the shaded sites near reservoirs, eating nectar of plants of family of the umbrella.
Females postpone eggs in the evening, at emergence in carrots of two - three real leaves, on one or small groups (until 10 pieces) at the basis of young plants for the soil. Fertility of one female to 120 eggs. In 20-40 days after the beginning of an okuklivaniye there are flies of the second generation.
As a rule, larvae of a carrot fly of the first generation harm from May to July, and the second - from July to September.
It is possible to frighten off a carrot fly by means of naphthalene which in mix with sand (1:10) is brought once during the season in row-spacings of carrots or other cultures at the beginning of a yaytsekladka and repeatedly in seven-eight days. A consumption rate of a preparation of 30-50 g on 10 sq.m.
In fight against a carrot fly, agrotechnical actions are important:
crop rotation, placement of crops of carrots and other plants of family umbrella whenever possible far from places where in previous years grew up these cultures;
crops towards the winter or early in the spring healthy seeds, it is desirable in places with easier soil;
destruction of a tops of vegetable and other vegetable remains, deep redigging of the soil;
timely weeding and thinning of carrots no later than emergence of the present sheet (zagushchenny crops are more strongly damaged by a carrot fly);
periodic selection and destruction of the plants damaged by larvae.