In the publication of staff of the State station of protection of plants the forecast of appearance of wreckers in autumn sowing and a measure of fight against them is given.
Short-term forecast of development and distribution
The fytosanitory condition of the Crimean fields is reduced annually by wreckers and an epifitotiya of diseases on grain crops.
So widely, podgryzayushchy scoops are widespread: winter wheaten, exclamatory. This autumn in Dzhankoysky, Krasnogvardeysky, Soviet, Nizhnegorsky and Pervomaisk areas emergence of the centers of the increased number a scoop, especially on the littered fields and on the fields released after steam predecessors is expected. At their number 2-3 Guus/sq.m we recommend to apply one of the following preparations: Bazudin, Diazinon – 1.5-1.8 l/hectares, Nurel – D-0.75-1 l/hectare and others.
In the steppe regions of the Crimea in crops of winter crops damage of shoots by provolochnik and lozhnoprovolochnik is expected.
After loss of enough of a precipitation there will be a population of myshevidny rodents. Gradually to increase the number in the presence of 2-3 colonies on hectare, 7-10 inhabited holes/hectares, it is necessary to hold destructive events by preparations of Rodenfos 3 úÓ/N, Rat death – 10-30 úÓ/N, Bromdialon – 3 úÓ/N and others.
Placement of winter crops on the best predecessors (i.e. reduction of the areas on sternevy predecessors) will allow to reduce injuriousness of larvae of the grain ground beetle which number is expected considerable. Otrozhdeniye of larvae is expected in the second decade of September on fruit drop shoots, and then and on shoots of grain crops. Because the main injuriousness of larvae of the grain ground beetle is expected in shoots of crops of winter crops. On irrigation lands it is necessary to provide a toksikatsiya of a sowing material a preparation – BI-58 – 1.8 l/t. On not irrigated lands. at emergence of the centers by number of 0.5-1 copies of larvae on sq.m., it is necessary to plan continuous or regional processings by preparations: Bazudin or Diazinon – 1,5-1,8 l/hectares.
Considering that September is expected rather warm, crops of grain crops should be carried out to optimum terms. Early term of sowing will be favorable for development of such cereal flies: black wheaten and Swedish.
In the autumn of the current year wreckers and diseases can create an intense fytosanitory situation in fields of winter grain crops of a crop of 2006-2007. Only continuous inspection of fields and timely protection of plants will allow to keep crops, to provide their density and to increase their winter hardiness.
V. Permyakov, chief of the State station of protection of plants, S. Kindruk, manager. forecast and diagnostics laboratory.