Registration Number
0221U100590,
0119U002182
, R & D reports
Title
To develop a pest control strategy in rice agrocenosis aimed at overcoming the phenomenon of resistance
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Head
Dudchenko Tetiana V,
Registration Date
07-01-2021
Organization
Institute of Rice of NAAS
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With different duration of joint vegetation of weeds with rice plants and a gradual increase in the mass of weeds, crop productivity decreases: after 20 days by 18.6%, 40 - 53.95%, 60 - 31.55%, 80 - 43.2 %, 100 - 53.35%, and for the entire growing season by 74.55%. The weight of weeds with increasing duration of the competition period increases from 2,775 kg / m2 to 5,110 kg / m2. Chicken millet plants (Echinochloa crus galli L.) in the process of long-term joint germination with rice plants dominate the culture in height from 13.3 to 43.2%. The leaf surface area ranged from 19.5 cm2 per phase (100 days of vegetation in chicken millet) to 101.2 cm2 per 80 days of vegetation in chicken millet). Regarding the productivity of the rice plant, the maximum amount of grain was formed at the shortest period of co-germination of 20 days - 2,820 kg / m2, weed crops throughout the growing season formed 0.393 kg / ha of rice grain, which is 74.5% less than pure crops. To control the weed complex in rice crops, the most effective herbicide, to control the weed complex is Divikston 25 NeoEC, k.e. norm of 1.2 l / ha, subject to the use of soil herbicide Commands 48 k.e. norm of 0.5 l / ha, the amount of stored yield is 6.2 t / ha, compared with the control version, where the yield was 2.0 t / ha. As a result, it was found that in the soil layer 0-10 cm the number of seeds in autumn by 43.9% exceeds the number of seeds in spring. That is due to shedding of mature seeds on the soil surface. Tillage helps to wrap the seeds to a depth of 10-20 cm or more. Dominant in number are representatives of the Bologna ecological group - a sharp reed 64052.6 pcs / m2 and spreading reed 39807.8 pcs / m2. Predecessors affect the formation of species diversity of species and their numbers in rice crops. The largest number was observed in the predecessor of rice - 850 pcs / m2, the dominant species were: chicken millet (Echinochloa crus galli L.) - 223 pcs / m2, reed (Scirpus mucronatus L.) - 617
Product Description
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Dudchenko Volodymir V
Palamarchuk Anastasiya V
Tselinko Lyubov M
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2021-03-17
