| 摘要 |
A method for protecting hop plantations from dominating phytophages includes settling laboratory cultures of Trichogramma onto plants. In autumn plant post-harvest residues are gathered and burnt, in addition, under-winter ploughing of hop gardens is carried out for a depth of 24-27 cm. Furthermore, in spring, after cutting the main hop roots an aqueous solution of the preparation Aktara 25WG w.g. (water-soluble granules) are applied into the furrows of row spacing in an equivalent of 150 g of the preparation per 1 ha. Then in the period of appearance of coleopterous species of phytophages on plants single spraying of the plants with an aqueous solution of the preparation Phytoverm 0.2% e.c. (emulsion concentrate) is carried out in an equivalent of 1.2 l/ha. In addition, in the period of the beginning of mass egg laying of females of noctuids, meadow moth and European corn borer two settlings of Trichogramma of the species Trichogramma pintoi Voeg. are carried out with an interval of 6-7 days in an equivalent of 90 and 100 ths. females per 1 ha. |
