| 摘要 |
A method for monitoring of parasites of eggs of lepidopterous species of phytophages includes directed process of observations of insect populations. At the beginning of the vegetation period paper cards with eggs of the silk worm moth (Antheraea pernyi G.M.), the age of which does not exceed 8-10 hours, glued thereon on the basis of 35-40 eggs per one card are exposed into agrocenoses of garden plantations and berry-fields. At the beginning of summer cards with eggs of the cabbage moth (Mamestra brassicae L.) or cotton noctuid moth (Chloridea armigera Hb.), glued thereon on the basis of 50-60 eggs per one card, are exposed. At the beginning of autumn cards with eggs of the leaf roller Exapate congelatella Cl., glued thereon on the basis of 60-70 eggs per one card are exposed. The cards with eggs are disposed in the crowns of trees or bushes on the basis of one card onto each third tree or bush, and cards with eggs are recorded each 4-5 days, infected ("blackened") eggs are selected for the further assessing thereof in biolaboratories. The level of infecting parasites of eggs of lepidopterous species of phytophages from three and more percents is indicative of the continuous presence of entomophages in agroecosystems. |
