Method of common lema control in winter wheat crops

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture and can be used as a protective measure in pest control. The method comprises post-harvesting shelling, fall ploughing and pre-sowing soil treatment. At that, on the field two varieties of winter wheat are sown. Along the perimeter of the field of the main variety the pest-resistant winter wheat variety Kuma is sown with the width not less than 50-55 m, and both varieties should be similar in terms of ripening, and harvesting of both varieties is carried out simultaneously.

EFFECT: method provides reduction of the pesticide load and increase in efficiency.

1 tbl, 1 ex

 

The invention relates to agriculture, in particular to environmentally friendly ways to combat pests in winter wheat.

Known methods of combating plavica ordinary (Lema melanopus L.) and other pests of winter wheat with application of insecticide (Agricultural entomology. M.: Kolos, 1983. P. 84-85).

However, the application of chemical means of protection increases costs and negatively affects the environment.

Known methods of combating plavica ordinary, including various agricultural activities, in particular post-harvest stubble and plowing, removal of crop grain cereals from fields where last year on these crops were damaged by plavica (Agricultural entomology. M.: Kolos, 1983. P. 84-85).

However, in conditions of deficiency of the square and the high proportion of winter crops it is difficult to provide the necessary removal of crops from each other, diminishing the effectiveness of land treatment.

The result of technical solutions - improving efficiency, reducing pesticide load. Technical solution is achieved by planting two varieties in the same field with the placement of resistant pest varieties as a protective strip around the perimeter of the field, and class must be close in ripening.

It is known that the stability of the ecosystem virust�et due to the increase of biological and genetic diversity of plant species, animals and microorganisms. Placement of two wheat varieties on the same field also increases resistance and grain productivity of agrocenosis in General.

For the cereal leaf beetle ordinary uneven settling of the fields. Beetles during the mass emergence of the focus on marginal strips, and then observed the colonization of field how the beetles and larvae. This feature of the distribution of the pest is used in the proposed method. The economic threshold of harmfulness of cereal leaf beetle beetles during the shooting of winter wheat 40 to 50 beetles/m2larvae in earing - 0.5 to 1.0 larvae/m2. If the damage is 50% or more leaf area, yield losses reach 10%.

The method is as follows

The field was seeded varieties of winter wheat with weak resistance to defeat plavica, and on the perimeter of the field strip of not less than 50-55 m sow early varieties of winter wheat Kuma. He refers to the strong wheat and produces grain with high baking qualities. In the conditions of a foothill zone of the North Caucasus grade showed an additional property - high resistance to shock plavica ordinary.

During the joint cleaning of both cultivars increased the quality of the grain mixture. Width of protective sowing variety Kuma determined empirically and based on the biological features of the dis�wounds of the pest.

An example implementation

After peeling, autumn ploughing and seedbed preparation field with an area of 100 hectares planted winter wheat varieties Kingfisher, and on the perimeter of the site - a variety Kuma width of 15 passes grain drills with the capture of 3.6 m. during the periods of survey work was carried out on the grounds of size 35×35 cm by 15 samples in the protective band (grade Kuma) and diagonally in the Central part of the sowing of the main varieties of Kingfisher. On account squares beetles were counted in the period of tillering and larvae in the period of shooting - earing. The same surveys were conducted a field sown with cultivar Kingfisher without protective sowing variety Kuma. The results of the census were presented in a table.

Table
OptionsThe number of beetles, pieces/m2The number of larvae, pieces/m2The degree of plant damage, %
in the protective stripin the Central part ofin the protective stripin the Central part ofin the protective stripin the Central part of
Sowing varieties Kingfisher120-12585-908-106-710085
Sowing varieties Kingfisher with protective sowing variety Cuma80-8555-603-41.5 to 2.02820

When the number of larvae exceeding 10-12 PCs/m2, in the protective band (grade Kuma) appropriate to the conduct insecticide treatments.

The method allows to increase the effectiveness of the fight against plavica ordinary, to reduce the pesticide load on agrocenosis, to improve the quality of grain.

The way to combat plavica common in crops of winter wheat, including post-harvest stubble, plowing, seedbed preparation, characterized in that the field is seeded with two varieties of winter wheat, while on the pitch perimeter of the main varieties are sown resistant to the pest of winter wheat variety Kuma a width of at least 50-55 m, both varieties should be close in ripening and harvesting of both cultivars were carried out jointly.



 

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