There are many pests of fruit crops. As a live food for birds, the apple moth, apple moth, gold-moths, larvae and pupae of which birds eat most readily are most suitable.
Apple moth. a small butterfly, with a wingspan of about 2 cm. It usually lays eggs after sunset on the lower surface of the leaves, fruits and shoots of apple, pear, quince and walnuts. The fertility of butterflies is 100. 150 eggs. On the 10th day, caterpillars hatch from the eggs, which gnaw out the canals in the fruits and close them outside with brown corks. Caterpillars feed on fruit seeds for 20.25 days. Then they climb into the cracks of the bark, the cracks of the packaging container, garden garbage, soil and make themselves white spider web cocoons.
Larvae of flies. They can be used when feeding chickens. It is not difficult to breed flies, under favorable conditions for 5. 6 days you can get a sufficient number of their larvae.
Larvae of flies, or maggots, are bred as follows. They take a large can, preferably a glass one, and insert another can upside down into it, for example, a can, or a piece of wood. The diameter of the inner can should be a few centimeters smaller than the diameter of the outer. The bait is placed on the inner jar. a piece of spoiled meat. The whole device. they keep the fly-fly on the street, where there are more flies, until they lay eggs on the bait. Sometimes the latter cover the entire bait with a white layer. Then the fly-fly is transferred to a warm place under a canopy to protect it from rain. The larvae hatching from the eggs go deep into the bait, and if it is not enough, another piece of meat should be placed. Large larvae before pupation leave the meat, sprawl and fall to the bottom of a large can. From here they are taken to feed the birds, placed in a glass feeder with smooth sheer walls.
There is a simple and convenient method of growing maggot at home, which can be used by bird lovers living in cities. Its value is that maggot is grown in sterile conditions throughout the year and makes it possible to receive 200. 300 g of live larvae annually.
For growing maggot, it is better to use a housefly, which is able to breed year-round. The female lays in compact heaps of up to 600 white eggs. Larvae are omnivorous and develop in decaying substrates of plant and animal origin. A larva emerged from an egg up to 2 mm in size undergoes three developmental stages corresponding to two molts. After the first molt, the larvae reach a length of 4.5 mm, after the second. 8. 9 and before pupation. 10. 13 mm with a mass of 22. 27 mg. At the end of the larval development phase, the larval cuticle hardens, forming a puparium (false pupa), from which an adult winged fly subsequently emerges.
The development of larvae and pupae largely depends on the temperature of the feeding substrate. In vivo, depending on the weather, the entire development cycle. from an egg to an adult fly. lasts 20. 25 days, at a temperature of 30 C. to 9. 11 days. When cultivating flies at home with a temperature of 22. 25 ° C, hatching of larvae from eggs occurs after 12.18 h, development of larvae to the stage of pupae. 7. 8 days, pupal development before the adult fly. 8. 10 days.
To grow maggot at home, you need to have a cage for keeping a uterine swarm of adult flies and dishes for larvae. With sufficient accuracy, the culture of flies can be kept on a small shelf in any room, without fear that the larvae will crawl out of the substrate or adult flies will fly out of the cage. The basic requirement. maintaining the room temperature within 20. 30 ‘C. If the temperature is below 20 ° C, the larval development period is increased, if above 32 ° C, it is reduced, but larvae can crawl out of the substrate.