SU990162A1 - Weed plant control method - Google Patents

Description

(54) METHOD OF STRUGGLE AGAINST VEGETATION

12

The invention relates to agriculture and can be used to control weeds, for example, on onions.

A known method for controlling weeds includes the treatment of plants with semerone, 2-methylthio-4-methylamino-6-isopropylaminosim-triazine, which is used to combat weeds on cabbage and onion plantations.

The effectiveness of this drug when making doses of O; 38-0.5 kg / ha in a. is also low.

With an increase in the use of doses, its effectiveness in relation to weeds decreases, and the toxicity to cultivated plants increases.

There is also known a method of controlling weeds in onion crops, which includes treating plants with linuron-N (3,4-dichlorophenyl) -N-methoxy-N-methyl urea. A herbicide of selective and systemic action, penetrates the plants through the soil and vegetative organs (leaves). Linuron is used in a dose of 2-3 kg / ha by introducing into the soil before the emergence of onions 2.

However, the known method does not have a high herbicidal action against weeds.

The aim of the invention is to enhance the herbicidal action of linuron, as well as to reduce its toxicity to cultivated plants.

The goal is achieved by

10 that additional treatment is carried out by Semeron at the rate of Linuron 0.25-0.5 kg / ha

Semerona0.25-0.35 kg / gA

An example. For spraying the plants, a working solution of linuron and semeron is prepared in specified concentrations. The solution is prepared on the day of spraying. Spraying of onion crops was carried out 35-62 days after sowing when 4-6 leaves of weeds were found, including seven seeds. A set should have at least 2 true leaves, 10-15 cm high.

25

When processing turnip onions, the phase of development of onion plants does not have a significant effect.

Test data on how to control weeds by vegetation on crops

30 onions are presented in the table.

Linuron Same - - Semeron Same - - TESTED COMPOSITION

0.1+ 0.13 30

24

0.13 + 0.25 30

18

ten

0.25+

13 0.25 30

17

0.25 + 0.35 30

25

No effect 11

and

Yellowing of the tips of the leaves at the Lukasevka

No effect

Yellowing of the tips of the leaves at the Lukasevka

-one

-14,29 No effect

20.0

33.33

11.11 Does not affect

142.86

56,67

83.33

257.14

Table continuation

0.5 + 0.5 30

0.5 + 0.7 30

0.7 + 0.730 The test results showed that the addition of Semeron as a Kergetika si to the composition of linuron significantly increased germicidal activity during the treatment of onion crops. The manifestation of synergism with respect to the two standards taken separately was established in the tested mixtures, including by weight ai. 0.25-0.5 kg / ha of linuron and 0.25-0.5 kg / ha of semeron. Within these limits, the herbicidal activity of the mixture of preparations for the action on weeds increased from 17 d to 25%. The highest herbicidal activity was observed when using the mixture, which includes by weight an. 0.25 kg / ha of linuron and 0.35 kg / ha of semeron. The death of weed plants in this case, in comparison with the separate use of preparations of the same dosage, increased by more than 2.5 times, or in percentage terms

16.67, 33

–3.08 Wish

-1 leaf tips

-4-12,99 Yellowing

Claims (2)

the tips of the leaves, and the dying off of single plants is 257.14%. Use testers. mixtures with dosages of drugs below or above the limits of the specified limits showed little or no synergy, and in some cases the herbicidal activity of the drugs decreased, and the test mixtures with large dosages of drugs damaged the cultivated plants. Thus, the proposed method is an effective means of controlling weeds on onions. Claims of the method of weed control, including the treatment of plants with a linuron, characterized in that, in order to enhance the herbicidal effect, additional treatment of ceMepoHoTi is carried out, calculated on the basis of Linuron 0.25-0.5 kg / ha Semeron 0.25-0 , 35 kg / ha Sources of information. taken into account during the examination 1. Kolesnikov O. Efficiency of Semeron on crops of onion sets. 9901628 scientific works. Plant protection from VR .ZH. Weed control, 1977, 1, p. 20. 2. Petelko V.P., Degt Renko A.V. Herbicides in turnip-onion crops. - Nalitelei, diseases and weeds. Novosobirsk, 1979, t.121, pp.64-67.