DD276621A1 - PROCESS FOR PROTECTING PLANTS AGAINST FROST CONTAINERS - Google Patents

Abstract

The invention relates to a method for protecting plants from frost damage. Specifically, the process according to the invention serves to increase the winter stability of crop plants, in particular to protect winter rape against frost damage. It consists in the treatment of the crop to agrochemical favorable appointment with an agent containing the chemical agent N-phenyl-carbamidsaeure isopropyl ester in a suitable formulation.

Description

Field of application of the invention

The invention relates to a process for increasing the winter stabilization of crop plants, in particular for the protection of winter rape against hibernation damage.

Characteristic of the known technical solutions

In addition to the yield of crops caused by diseases and pests, the damage and loss arising from the effects of the chewing and frosting are economically very important. In order to prevent such shawls, various physical agents such as mists, foams and polymers are used as well as chemical agents which reduce the metabolism of the plants and thereby keep them in a "dormant" condition.

It is already known that hydroxamic acid derivatives (DD-AP 129995) or 3,6-dioxohexahyaropyridazin-4-ylacetic acid derivatives (DD-WP 150683) are suitable for the protection of plant geology frost damage.

Dieso known methods and means can not prevent, however, that in particular the winter rape in unfavorable development exceeds the optimum for hibernation growth stage and thereby loses its natüi Liehe winter strength.

It has already been described that the active ingredient N-O-chlorophenyD-carbamic acid isopropyl ester has the necessary properties to increase the winter fastness of crop plants and to protect aiese from frost and Auswinterungsschädon (USPS 3180056, DD-WP 222771). However, its use in practice is subject to technical and economic shortcomings. So he calls phytotoxic damage to the treated crops, such as leaf necrosis, hnrvor because of its horbicidal effect, especially at higher application rates.

Object of the invention

The aim of the invention is a method for increasing the winter fastness of crop bees, in particular of winter rape, consisting in the application of a chemical agent which is offaktivor compared to bakannten agents and less phytotoxic and therefore umweltverträglichor.

Explanation of the essence of the invention

Technical task

It is an object of the present invention to provide a method which increases the winter strength of economically important crop winter rape by providing an agent which is suitable for this purpose, which is technically readily available and which has a chemical agent adapted to the intended use Formulation contains, for agrochemical Cheap appointment on dio Qestandsfläche is applied and thereby Fiostschädon (Auswintorung) avoidance ηϋίί.

Features of the invention

The investigations on the Wintorraps were gofundon that or soino grossto Wintorfnstigkoit at the Endo dor vegetative Phaso soiner development in the Horlist. In the after that oinsotzondon gunorativon Phaso os comes to the extension of the sproutsachso and to the anlogo of flower primoidion on the sprout meridian. Diosos Woitorwachson (Üboiwachson) is promoted by a mild Wittorung in the Monaton Novombor and Dozombor. Dorart uborwachsono Rapspflanzon are highly prone to outgrowth, and so, after a long-toned strongon, Fröston arrives at the Großon krona with late-oronergic orbital in Don Wintorrapsbostnndon.

Eino bosondoro rollo spiolon dioso Gofahron for dio nou ontwickolton rapeseedon, boi donon by inhalation of S'jiinnurrapsarton which has been virtually destroyed for dio pre-wetting as nourishment nourishing nourishment of erucic acid and glucosinolaton (so-calledor 0 / O-rape). For their introduction into dioeconomic practice, the possibility of protecting gogon is the cause of major economic problems.

The present invention is based on the observation that the development of winter rapeseed is greatly delayed or stopped ("dormant" state) when treating the plant stock for agrochemical favorable appointment with an agent that also known as herbicidal active compound N-Phenylcnrbamidsäure- isopropyl ester (propam) in a formulation suitable for practical use.

So far, only the chemically closely related NOChlorphonyDarbamidsäureisopropylester (Chlcrpropham) has been described as an agent that prevents the overgrowth and thus Auswinterungsschäden in winter rape (OD-WP 2227 71) .It seemed plausible to assume that the growth-retarding effects of this drug with its strong herbiz ' the effect is especially against grasses kerreliert. Therefore, it is extremely surprising and unpredictable that the much weaker herbicidally active prophy (progress of the chemical research Bd.9 / 1967 / page 262) represents a comparable concentration stronger inhibitor of elongation growth with the same developmental delay compared to the chlorpropham. In addition, the active ingredient propam according to the invention has a number of other technical and economic advantages. It is better absorbed by the leaf, has no leaf-destroying necrotic effect, is less phytotoxic to crops, is chemically-technically easier to access, cheaper to produce and more environmentally friendly. Thus, the application of the active ingredient propam according to the invention for the purpose mentioned enriches and improves the state of the art. Against the use of Propham to prevent frost damage to crops, especially winter rape, there are no concerns, because this Wiikstoff already as ¹ ' Selective pre- and Nachaufiaufherbizide in vegetable and ornamental plant cultivation and in forest plant breeding is applied. The best effect abolished the agent according to the invention in foliar application postemergence. The best time of application is given when the winter rape is about to complete its vegetative development and due to continued mild weather an overcrowding of the stocks must be feared. An average cost of 1 to 3 kg / ha (corresponding to an active ingredient content of 0.25 to 0.75 kg / ha) at 600 l / ha Brüheaufwand-nengc · is sufficient to bring the development of Winterrapplflanzen despite mild weather to a standstill or very strong to previous. This preserves the otherwise lost optimal frost resistance. The effect of the agent extends to freezing, so that a single treatment is enough. An adverse effect beyond the winter period could not be observed in any case; the treated plants continued to develop synchronously with the untreated plants in the spring.

Due to the better hibernation, the treated crop is less susceptible to diseases caused, for example, by phyiopathogenic fungi, which explains, among other things, the higher yields achieved in the experiment.

The active substance used for the process according to the invention can be used together in combination or tank mixture with crop protection agents or agrochemicals while maintaining the optimal application rates and the agrochemical dates for the application. Due to the often favorable timing agreement between, for example, herbicidal use and use of the method according to the invention operations can be merged and additional effects can be achieved.

embodiments

1. Effects on the wintering form

1.1. At the Güstrov site, in a small plots trial (each plot had an area of Im χ Im and repeated four times in the vtr search complex) the effects of different progenies Propham in comparison to the untreated control of the plant form before winter entry were examined. The final rating orfolgo on 15.11.1985.

Tab. 1 Location Güstrow

means shoot axes number of sheets Pflanzonlänge of treatment length in cm piece INCM Untreated plants on 16.10. (Baseline) 2.34 4.30 39.02 Prophy0.1 kg / ha 3.31 5.32 48.67 Piopham0,2kg / ha 3.72 5.22 49.82 Prophom 0.3 kg / ha 3.61 5.34 47.03 Propham0,4kg / h » 3.65 5.52 46.17 Propham 0.5kg / ha 3.21 5.29 43.21 Propham 0,6kg / ha 3.22 5.17 43.73 Unbohandeito control (UK) 6.35 4.22 66, OE7

Dio Sproßntlisonläii (joi) are also shortened by dio goringsto Wirkstoffaufwandmtngü gosichort. The number of sheets is about 1 sheet higher, whereby production costs by 0,6 kg / ha have a favorable effect.

Dio Gosamtpflanzonlongn is due to (lon Wirkstolf doutlich roduziort, the more so, the more høher the effort is Mon.as hoo dor unbohandolton Kontrollo handles transplanted plants, it becomes apparent that the means vorgindort the overgrowth.

1.2. At the Gommorn site, 6ha Wintorraps dor Sorto "Sollux" were boholed on the 9th of October 1987 with 1.6kg / ha FL 604 (50% active ingredient Propham) Dio recording of the test mordmalo after the boring took place on 12.10.87 (1), dio bondioso bonitur nm 11.12.87 (2) t (3).

Tab. 2 Location Gommern

Pöfglied " Root diameter in mm Sheet number pieces Obeiircii3che biomass g / m ² ßisiandes- höho in cm (DUK (2) UK (3) UK 6,34 13,21 8,40 4,45 6,19 6,28 2337 3912 3 2R0 35.0 28.0 26.5

It is clearly evident that the amount of Bectandes has barely increased in comparison to the day of treatment under the influence of the agent, and that therefore also the aboveground biomass is distinctly lower than that of the untreated Contro'le. The Wurzolhalsdurchmesscr Of this is already critical values for hibernation at 13 mm and is significantly reduced under the average action. 1.3. At the location Schwerin 5ha winter rape of the variety "Sollux" were treated on 12.10.1087 with 1.5kg / ha FL 604 (50% active ingredient Propham) Compared to the untreated control, the following values were obtained on November 26, 1987:

Tab. 3 Location Schwerin

Test member root neck shoot axis root mass

diameter length

in mm in cm

UK 9.6 1.98 9?, 8

treated 10.3 1.25 132.2

This results in a positive effect on the growth of the underground biomass compared to the control. Since the aboveground biomass is highly susceptible to frost, this effect is extremely positive for wintering and is very likely the cause of the higher yields observed in Table 5.

2. Effects on the wintering

At the location Güstrow the stock "Belinda" was treated on the 20th of October, 1986. The scoring took place on the 15.4.1987.

Tub.4 location Güstrow

Variants dead / living Pflanzon per m ^!

UK 6.8 31.6

Probanil3kg / ha 14.4 23.2

Elbanil 3kg / ha 16,8,20,6

Prophet 0, / 5 kg / ha 0.8: j6.8

The average values from 38 individual measurements shown in Table 4 clearly show the positive effect on the overwintering capacity of the oilseed rape.

3. Effects on yields

3.1. At the location Uüstiow were in the same Kleinparzellenversuch as under 1.1. Yield tests after treatment with the active substance compared to other means and to unbehandeltom rape carried. The results are listed in Tab. 5.

Tab.5 Location Güstrow

variants rel. % UK (00 CCC 6 I / In 110.22 Camposan6l / ha 74,20 Elbanil 3kg / ha 105.16 Prophet 0.75 kg / ha 133.42

An approximately 30% higher yield was confirmed after 2 years of investigations under optimal climatic conditions. 3.2. During the growing season of 1987/88, 3 large pre-treatment tests were carried out at the site of Sohlsdorf, Gnovsdorf and Kroien, each with ti ha, bohandolt with 1.5 kg / ha FL 604 (50% active ingredient Propham). The ermittolton words boziohen on dio Horb & tbonitur before the Vogetationsruho

 Major yield was due to preseason donor ormittoit.

Tab. 6 3 locations Sproßnchson · lango in cm Root cervix in cm Leaf mass g / m ⁷ Yield dt / ho Prüfgliod 2,12 1,94 0.62 0.63 1780 1782 29.75 30.75 UK bohandolt

It resulted in oino yield increase of average

Claims (5)

-1- 276 621 claims for invention: 1. A method for protecting plants against frost damage, characterized in that agents are used which in addition to the usual excipients and carriers, the active ingredient N-Phenylcarbamidsäure-isopropyl ester. 2. Means according to item 1, characterized in that they are used to increase the winter strength and to prevent Auswinterungsschäden in crops. 3. Means according to item 1 and 2, characterized in that they are used in winter rape. 4. Means according to item 1 to 3, characterized in that they are applied to the sheet at an existing risk of overgrowth of winter rape stocks. 5. Means according to item 1 to 4, characterized in that they are applied in combination or in tank mix with other agrochemicals together.