DD147039A1 - APPLICATION OF A TEMPORARIAN CELEBRATION AGENT FOR PLANT POTATOES - Google Patents

Abstract

The germ inhibitor is intended to temporarily prevent the germination of seed potatoes. The aim of the invention is the application of an easily accessible and cheap germ inhibitor for seed potatoes, which does not impair their germination ability, has no Faeulnisanfaelligkeit and low toxicity. The invention is based on the object, in fumigant mixtures, which are preferably to be applied as reaction aerosols, as a component which inhibits the mixing of mixtures of higher alcohols having a chain length of C & ind 17! to C & ind20! and / or those with a chain length of C & ind21! to C & ind23! and isopropyl phenylcarbamate IPC. According to the invention, these alcohol mixtures are added to the fumigant mixtures in a proportion of 25 to 30% by mass. Furthermore, 0.25 to 0.75% by weight of isopropyl phenylcarbamate is contained in the fumigant mixture. The application of the active substances, whose application rate amounts to between 100 to 200 g per tonne of seed potatoes to be treated, is preferably carried out as reaction aerosols in ventilated storage areas and rents.

Description

Title of invention

Application of a temporary germ repellent for seed potatoes

Field of application of the invention

The invention relates to the use of a temporary Keinihemmungsraittels for seed potatoes. The Keirahemmungsmittel should temporarily prevent the germination of seedlings stored seedlings. It can be used in all ventilated storage and rents for seed potatoes.

Characteristic of the known technical solutions

The treatment of potatoes with chemical anti-sprouting agents before or during the storage period is known. In particular, solid and liquid germination agents in the form of dusts or spray mixtures are used. For some time, germ inhibitors have been used for table potatoes such as isopropyl N- (3-chlorophenyl) carbamate CIPC in the form of reaction aerosols. (JUMAR ₁ A., SIEBER, K, J BOLLMENN, ¥., The Food 12, 4-, 5,469). A variety of easily evaporable substances such as ethanol, acetaldehyde and ethylene has been studied. Particularly good antimicrobial properties are possessed by 3,5,5-trimethylhexgnol (1), an isomer of nanolanol, (BUHTON, W ₈ G., Europ. Potato Journal Voll (1958) Nr, 1). Of those used for the suppression of potato germs Alcohols bring nonyl and amyl. respectively, decyl alcohols give the best results (SAVIYER, RL, and THOSNE, WH ,, Amer, Potato Journal 1962 (Yes)) 3 * 16? to 1.3). In long-term experiments by BURTON (1958)

Various alcohols were tested and tested. The application was carried out by evaporation of the active ingredient in a continuous stream of air during a treatment period of 15 days on four consecutive appointments. "The application rates per treatment 200 to 220 g / t. This means that energy is required for four application sections of total GOTagen and a wallet of 800 to 1000 g / t potato. The application period of 60 days and the said application rate cause an almost complete suppression of the seeding and, when planting potato tubers treated in this way, insufficient field emergence. The suitability mentioned in the literature (SAUYER, RL and THORNE ₅ W ₈ H., Potato Journal 19β2 (J3 £), pp. 67 to 175, of such treated tubers as seed potatoes could not be confirmed in multi-year ITaching experiments to an almost complete suppression of the Pflansenaufgangs and thus to significant yield depressions.

Variant testing of monohydric alcohols including chain lengths C, CQ ₁₁ C .-, Cg, C. ", C ,,. at application rates of 0.95 to 9 _t / ml and bushel and 1 to Smaliger treatment by the above authors, showed Dokanol '-C ,. ^ - the best results betjgffs inhibitory effect compared to the food cartel felkeiraherumungsmittel - CIPC. In ¥ P -Α-Θ4-f ^ -töH ¹ ^ is the use of a combination of higher alcohols, preferably of blends, the main components nonanol and Dckanol are for the temporary inhibition of germination of seed potatoes, described "The active ingredient is as a gas, condensate, Aerosol or brought into contact with the stored material in the liquid phase. A good temporary germination is achieved. The disadvantage is in addition to an increased susceptibility to rot in the high price of the agent.

Object of the invention

The aim of the invention is the application of an easily accessible and cheap seedling agent for seed potatoes, which determines their germination capacity. not impaired, has no susceptibility to decay and low toxicity.

Explanation of the essence of the invention

The invention is based on the object, in fumigant mixtures, which are to be applied preferably as reaction aerosols, as a keimhibiting components mixtures of higher alcohols having a chain length of C " to C" _Q and / or those having a chain length of C _p . to C _? ~ as well as isopropyl-phenylcai'bamat-IPC- to use. According to the invention, fumigant mixtures are used whose effective components are the abovementioned higher alcohols. It is preferable to use alcohols which are obtained as by-products or residues in the fatty alcohol production by paraffin oxidation. These are once those having a chain length of about CL ₁₇ to C _o , referred to by the industry as RV PC alcohols and / or alcohols having a chain length of about Cp to Cp ,, by the industry as the backbone FA 21 become.

These are the Fumigantmischungen in a proportion of 25 to 30 mass "percent added" Furthermore, 0.25 to 0.75 mass percent Isopropylphenylcarbamat-IPC-contained in the Fumigantmischung * The application of the active substances is preferably carried out as a reaction aerosol, the treatment once, im If necessary, twice in ventilated storage and rents, an amount of 100 to 200 grams of active substance per tonne of seed potatoes to be treated is used.

EXAMPLES

The invention will be explained in more detail below with reference to two embodiments.

It was the potato variety "Salut" subjected to stress storage at an average of 21 ° C and contacted with the composition of the invention as a reaction aerosol

 Date of treatment: 02.05.1979 Removal date: 24.05.1979

Example 1t

A fumigant matte of the following composition was used: 'Alcohol mixture of chain length C.' to Cp ₀ (FA 21) in the fumigant with a proportion of 2 ~> ma% by weight and an admixture of 0.25 to 0.75% by weight of isopropyl-phsnylcarbamate IPC,

A concentration of 200 g of active substance per ton of seed potatoes to be treated was used »

admixture seed weight rot weight loss ( % IPC) ( % ) ( %) ( % ) 0.25 0.88 0.0 3.15 0.50 0.66 0.0 3.69 0.75 0.4-2 0.0 3.56 control 2,74- 0.0 4, 31 Example 2:

A fumigant pattern of the following composition was used: Alcoholic chain length C 1 to C 1 (RV alcohol) in the fumigant in a proportion of 0.25 "to 0 _s 50% by mass isopropyl-phenylcarr bamate (IPC) per ton of seed potatoes to be treated,

Admixture germ weight rotting mass loss

0.25 '1.14-0.8? 1.76

0.50 O _t 92 0.0 1.2

Control 2.74-0.0 4.31

Claims (1)

invention claim Application of a temporary germ repellent for Pflanzkarto.ffein based on higher alcohols characterized by the use of Futnigantmischungen higher alcohols having a chain length of C, * to Cp ₀ and / or those having a chain length of C ^ a ^ is ^ 0-2 and isopropyl Phenylcarbaraat, the treatment once, if necessary, takes place twice in '' aerated storages and rents with the Fumigantniischungen as a reaction aerosol containing a proportion of 25 to JO mass percent of higher alcohols and 0.25 to 0.75 mass percent Isopropylphenylcarbamat and the application rate of active substance is 100 to 200 g per ton of seed potatoes to be treated.