Protection of winter wheat from diseases and pests

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Visnyk LNAU: Agronomy 2019 №23: 159-163

Protection of winter wheat from diseases and pests

Kosylovych H., Candidate of Agricultural Sciences
ORCID ID: 0000-0001-5908-3312
Holiachuk Y., Candidate of Agricultural Sciences
ORCID ID: 0000-0002-2890-164X
Lviv National Agrarian University

https://doi.org/10.31734/agronomy2019.01.159

Annotation

The dominant species of harmful organisms in winter wheat crops were detected and the new effective pesticides for including for plant protection system against diseases and pests were choice in the results of research. The levels of development of harmful organisms at using pesticide were low compared to controls. Thus, the development of leaf diseases in variants with pesticides did not exceed 8 %, in control – 38 %, wheat ear diseases were 3 % in variants with pesticides and 8% in control respectively. The low level of powdery mildew was observed at using fungicide Tilt Turbo, 57,5 EC (fenpropidin, 450 g/l + propiconazole, 125 g/l) in the end of tillering (EС-29) in rate 1,0 l/ha and low levels of Septoria spot, Pyrenophora spot, yellow rust were at using fungicide Rex Duo, 49,7 % EC (tiofanat-metyl, 310 g/l + epoxiconszole, 187 g/l) in rate 0,6 l/ha. Further restriction of the development of these diseases was noted at use in the phase of flag leaf (EС-39) of the preparation Adexar Plus, 14.98 EC (epoxiconazole, 41,6 g/l + pyraclostrobin, 66,6 g/l + flucopyroxid, 41,6 g/l) in rate 1,0 l/ha. Application of the preparation Tilmor, 24 EC (protiokonazole, 80 g/l + tebuconazole, 160 g/l) in rate 1,0 l/ha in the flowering phase (EC-59) effectively restrained the development of Fusarium sp. and Alternaria sp. on the ear of winter wheat. The low degree of plants damage by pests was recorded when use for the first spraying in a tank mixture with fungicides of Engeo insecticide, 24,7 CS (thiamethoxam, 141 g/l + lambda-cyhalothrin, 106 g/l) in rate 0,18 l/ha, and insecticide Karate Zeon, 5 SC. (lambda-cyhalothrin, 25 g/l) in rate 0,15 l/ha for the second application. The degree of plants damage by pests of leaf-eating species on variants of experiments with these insecticides did not exceed 4 %, and on the control it was 28 %, insects of sucking species, respectively, 5–12 % at using insecticides and 25–38 % – on control.

Key words

winter wheat, wheat diseases and pests, fungicides, insecticides, tank mixtures of pesticides

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