DD159734A1 - MEANS FOR REPRODUCTION OF PLANTS OR PLANT PARTS - Google Patents

Abstract

The invention relates to means for Abtoetung of plants or parts thereof. As active ingredients, synergistic mixtures of 1-Butylaminocyclohexan-phosphonsaeuredibutylester with alkali and / or alkaline earth metal Aziden.Kombinationen with known Duendemitteln and sikkanten are vorteil.Besonders suitable are the new means for Abtoetung potato herb before harvest.

Description

230942 3

WP AOHST, 57/20 AOHSr, 59/00

Title of the invention

Means for killing plants or parts of plants

Field of application of the invention

The present invention relates to herbicidal combinations which are used as siccatives, especially for killing offroots of potatoes, grain legumes, rapeseed and in the case of seed carriers.

Characteristic of the known technical solutions

In modern agriculture, the use of sikkationsmitteln is of great importance _o In potato cultivation, the potato herb is to be killed shortly before harvest by means of chemical means and largely dried to facilitate the use of harvesting technology and the migration of viruses into the tuber and the Prevent infection of tubers with Phytophthora infestans. When cultivating seed carrier stocks (eg field bean, oilseed rape) an accelerated and uniform maturation is to be achieved by chemical means, especially under extremely humid climatic conditions in the maturing period, which also facilitates the use of harvesting technology and high energy consumption.

• 2309-42

applications for drying the seeds should be avoided * ¹ Common commercial products contain dinitro-cresol (DlIOO), sodium chlorate, 1,1-ethylene-2,2-dipyridylium dibromide (diquat) or i-butylaminocyclohexane-dibutyl phosphonate (Buminafos) as active substances "Most of the compounds used for this purpose have the specific application rates specific Jfochteile on, which oppose the broader application" DUOG, due to acute general toxic effect (the ΙΌ50 is 36 mg / kg rat ρ · Ό ») not in large be .Umfange used (user and wildlife hazard) _o chlorates act as strong oxidants and enzyme inhibitors and are very persistent so you cause for immediate lachbau other cultures to run harm · diquat (DD 114 328) may occur due to rapidly occurring Absterbewirküng and the migration cause tuber damage in the stalk under certain conditions and is also a ecotoxicological effect not harmless "When using Buminafos (DD 94 280), which does not have these disadvantages, the efficiency is not satisfactory, so that its application is not always economically justifiable."

Some alkali metal azides have been proposed for use as defoliants (US 3,376,125, US 3,376,126). Their effect is not satisfied in most cases yet ·

Also known are various combinations of Buminafos, ZoBo with dipyridylium compounds (DD 115 022) or triazine derivatives (DD 123.261). However, the mixtures only insufficiently overcome the disadvantages mentioned.

Aim of the invention

The aim and the object of the invention are to seek new means of siccation which reduce the mentioned disadvantages and, in addition to a good siccative effect, are not very toxic for the stated fields of application and show no harmful residual effect in the cultivation of other crops. , ·

-3- 2309

Explanation of the nature of the invention

It has surprisingly been found that mixtures containing *.

i

(A) 1-butylaminocyclohexane-phosphonic dibutyl ester (I)

₉ (n) 0-C ₄ H ₉ (n)

Il OC, H _q (n)

and

(B) alkali metal azides and / or alkaline earth metal azides

as active ingredients have a significantly better sikkierende effect than the expected additive activity of the • individual components (synergism) _o ^! ,

The erfindungsgemä.en agents are particularly suitable for chemical A.ustrocknung of potato herb before harvesting the potato tubers By killing the killed potato herb-the use of mechanical harvesters greatly facilitated 'Likewise, the means for siccation of grain legumes, sugar beet and feed seed carriers and other seed carriers In addition, the use for controlling undesired plant growth is given.

Furthermore, it has been found that the use of the agents according to the invention is associated with increased yields of the hydrated products. The low Kachauflaufschäden the compositions of the invention in comparison with effective amounts of commercial preparations _e are advantageous It was also found that a combination of agents of the invention with known fertilizers, particularly urea and Pho sphatdüngemittein and / or customary in practice Sikkanten, in particular nitrated phenols (ζ · Β, p-nitrophenol, dinitro-o-cresol) and chlorates (zoB ^ sodium chlorate, Magne3iumchlorat) is characterized by beneficial effects.

The novel agents thus represent a valuable enrichment of the state of the art. The chemical preparation of dibutyl 1-butylaminocyclohexanephosphonate is known (DD 80 586). Alkali metal azides are commercially available chemicals. , The mixing ratio of the active ingredients may vary within a wide range, preferably a mass ratio of i-butylaminocyclohexane-dibutyl phosphonate (A) and alkali metal and / or alkaline earth metal azides (B) of 2: 1 to 20: 1,

Of the present invention screened active compound combinations according formulations can be prepared in a known manner * this purpose they are with the usual excipients, optionally dissolved using surface-active compounds or "· dispersed or solid carrier materials, mixed or by other known methods formulated · ¹ contain the formulations generally between 5 and 90 % by weight of active ingredients · They can be used as such or in forms prepared by further dilution «.

The application is carried out in a known manner, for example by pouring, spraying, spraying or scattering.

Ausführungsbei games

The siccation effect of the agents on potato herb and field bean leaves is indicated by the degree of killing of the plant parts after daily or 10-day exposure to the agents. In this case, the mortality Bgrad was scored as a percentage. At the time of application, max. 10 % yellowing or ripening phenomena were found on the leaf mass. The synergistic effect was calculated according to the formula of COLBY:

E = X ₊ Y ₊ Z - &

· Y ο Z · ·

10000 ..

23 0 94 2 3

Synergistic siccative effect of a mixture of i-butylaminocyclohexane-phosphonic acid dibutyl ester (I) and sodium azide (II) on potato stocks ^:

Conc. ₀ : g / 100 ml

Desiccative effect in percent

.1 II I + II synergistic

(known) (known) see effect

0.5 0.5 · Ow CQEBY)

leaves 80 70 100 not possible to evaluate stem 0 26 75 49.0 Conc _o: g / 100 ml 1.0 0.5 leaves 100 70 100 not possible to evaluate stem 20 26 86 45.2 At SOiel 2

Synergistic siccative effect of a mixture of i-butylaminocyclohexane-phosphonic acid dibutyl ester (I) and potassium azide (II) on potato stocks

g / 100 ml

Desiccative effect in percent I II I + II Synergisti- (known) (known) see effect 1.0; 0.5 (n.OOLBY)

Leaves stems

100 20

80 100 not out

cycled

40 92 40.0

3094 2 3

Example 3

Synergistisehe sikkative Y / irkung a mixture of i-Butylaminocyo.lohezan-ph'phosphonsäuredibutylester (I) and calcium azide (II) in potato stocks

Conc. ₀ : g / 100 ml

Desiccative effect in.Percent

I II I + 11

(known) (known)

1.0

leaves

stem

100

0.3

Synergistic effect (n _e ^; COLBY)

not possible to evaluate

64.0

Synergistic siccative effect of a mixture of butyiaminocyclohexane-dibutyl phosphonate (I) and potassium azide (II) and calcium azide (III) on leaves of field bean

Concentration: 100 ml

Desiccative effect in percent

I II III

'(known)' 0.1 0.1 0.1

27 27

I + II I + III Synergistic Effect (a COLBY)

65

80

38.0 53.0

230 942

Example J ^ . '

Synergistisehe siccative effect of a mixture of. i-butylaminocyclohemn-dibutyl phosphonate (I), trium azide (II) and p-ITitrophenol "(III) on leaves of field bean.

Desiccative effect.in.percent I II III I + 11 + III Synergisti

'.' (known) 'g / 100 ml 0.1 0.1 .0.1

27 5 20 90

Synergistic siccative effect of a mixture of i-butylaminocyclohexane-dibutyl phosphonate (I), Katriumaaid (II) and urea (III) on leaves of field bean

Desiccative effect in percent

I II III I + II + III synergistic

'' (known) 'see Wirkun,

Konzo: g / 100 ml 0.1 0.1 1.0 cn. ' COLBY)

27 5 0 75 '44,4

3 0 9 4 2

Example 7

leaf damage to 12 days old seedlings of garden cress (Lepidium sativum * »♦)

Time after application of the active substances (in weeks)

2 4 6 8

Control (untreated) 1 1 1 .1

Sodium chlorate (known) .4 4 4 4

I-butylaminocyclohexane 3 3 2 1

phosphonsäuredibütyl-

ester (known) . -.

t-butylaminocyclohexane '2 2 1 1

phosphonic acid di butyl '' '

ester / sodium azide (1: 1) '

Per sample, 50 seeds were sown

The harmful effects were scored in a 5-step scale:

1 - occasional yellowing of the seedlings

2 - weak harmful effect 3 '- average harmful effect

4 - strong damage.

5 - 'seedlings largely dead

-9- 13

Beisgiel_8

Increase in yield of potatoes

 * - · '

"Adretta" potatoes were sprayed three times before harvest with a mixture of 6 kg of Trakephon (EC, 40 % active ingredient: 1-butylaminocyclohexylphosphonic dibutyl ester) and 1.2 kg of sodium azide per hectare in 600 1 v / asser » The plucking of the crop yield was done on 40 plants per bear cell (10m ² ) _o In detail, the following results were obtained:

• Experiment a earnings in kg Trial b untreated inventively 35.2 37.7 32.3 34.4

Claims (5)

invention claim 1 means for killing plants or parts of plants, characterized in that they act as a mixture of. (A) i-butylaminocyclohexaji-phosphonic acid dibutyl ester (I) NH-C ₄ H ₉ - (η) 0-C ₄ H ₉ (n) P II 0-G ₄ H ₉ (n) 0 and (B) contain alkali metal and / or alkaline earth metal azides 2 »Use of agents according to item 1, characterized in that they are used in crop protection and for controlling undesired plant growth. 3 »process for the siccation of plants, characterized in that one acts on a combination of active substances according to item 1 on plants or.deren parts · ~ 11 - 4 »Composition according to item 1, characterized in that it contains i-butylaminocyclohexaji-phosphonic acid dibutyl ester (A) and sodium, potassium and / or calcium azide (B) in a mass ratio of 2: 1" to 20: 1 " 5 _# Means according to item 1, characterized in that they are used in combination with known fertilizers, preferably urea and phosphate fertilizers and / or practical sikkanten, preferably p-nitrophenol _s Dinitro »o ~> cresol, sodium and magnesium chlorate _a