DE2010792A1 - Remedies against terrestrial molluscs - Google Patents

Description

Priorities from U.S. Patent Application No. 805,375, dated March 7, 1969 and Ur. 805 377 of March 7, 1969

Earth molluscs such as slugs, slugs and the like are known pests for plant cultivation. Snails destroy practically all substances of vegetable origin and are both a nuisance and an economic hazard for the grower of various products, such as grain and citrus fruits, and especially for plant breeders, nurseries and home gardeners. Because mollusks reproduce so quickly, they can quickly destroy all or the seedlings Devour crops in a planting area. It is well known that a mollusc can eat its weight in two days.

According to the invention, one way of controlling earth gnats is specified, which consists in using a certain Amount of irimethyl tin hydroxide or hexamethyl tin that molluscicidal act, apply to the soil.

Trimethyl tin hydroxide and hexamethyl tin are known. Compounds and can according to the procedures of JAOS ₀ 51> 3605 ■ '(Ί929) and Chem _o Ber. 50, 1088 (1917).

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In the production of the erfir.dungsgereäß to combat Compounds used in snails will be a carrier with a molluscicidal amount of iriinethyltin hydroxide or nexamethyldizinn mixed, this amount is for surface treatment; preferably 0.01 to 10% by weight of the preparation. One uses

2 about 11 g to 1.1 kg "'irkstoi'f at 1000 m. In the carrier

know not only the active substance but also other materials that can be incorporated, such as bait to attract the snails or other means that facilitate the application or distribution of the preparation. The carrier can of course be a liquid or a solid carrier, and the preparations can be in the form of branches which are spread on the ground, the snails advising the preparation to come into contact. In liquid preparations, the trinethyl tin hydroxide or hexamethyl tin is preferably dispersed in the liquid solvents with or without a suspending agent. if a solid support is used, canr. it can be one of the well-known, easily accessible solids, such as vermiculite, jellulosic material, tape, silicates and others

“As stated, the invention is application based these compounds for the control of Erd- ', 7eichtieren, and es It is surprising that trimethyltin hydroxide and r.exar .-. ethylditin acts so specifically on this type of organism, individually Jellyfish that have been tested and found to be susceptible to trimethyltin hydroxide and hexamethyltin., are Arion ater (European black earth snail), Helix aspersa (brown garden snail), Limax maximus (spotted Garden snail) and Deroceras reticulatum (gray garden snail).

The following examples serve to further illustrate the invention.

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example 1 -r? Preparations

A * Typical bait ^ preparation

Trimethyl tin hydroxide * 0? 25 70

Bait ^ Carrier ** 98 » $ 75

Verdiekun-Qniittel *** 1, OO> 1

TOO ""' f * dissolved in acetone for ease of incorporation

** AIf alf a-r flour, ground wheat bran, hey or ge? -

ground ./pumice stone
*** polyvinyl alcohol

B. Typical preparation with solvent

Trimethyltin hydroxide 20 i *

Xylene 79 1 °

Triton X-161 (surfactant ) 1 - / <>

100 7 °

Q, typical preparation with wettable powder trimethyltin hydroxide 25 y *

fuller earth 59 Ά

Petro WFX (antibacterial agent) - $ 3

Marasperce K (surfactant

.uittel). 3 - ~ h

Ascorbic acid 10 ^: ß>

100; =

D. Typical granule preparation

Tri & ethyl tin hydroxide "10 - / o ground corn cobs 87 7 °

Xylene 3 ^z h

100 70

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These preparations can be sprayed, dusted or otherwise be applied; they can also be brought into paste form or some other suitable form.

Example 2

The evaluations were made at about 17G. Each of three experimental arrangements consisted of five animals in a test box consisting of an open area with moist soil una covered refuge with wet peat bog. the Test baits were made from ground wheat bran with acetone added to dissolve the chemicals and to be arranged. A little bit of bait in the middle of the Area was the only source of food for the animals in each Testuox. at regular intervals were the lying Animals (usually attacked by the chemicals) and the dead animals observed. Death was determined by toasting the immovable i'iere with a pencil, with none Contraction, death was registered.

iclrenae IaLeIIe 1 shows the results obtained.

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Tabel Effectiveness of trimethyltin hydroxide in the fight against snails

slug

Concentration of the agent

Number of snails after 7 days 10 days % dead after 48 hours 4 days ange dead 10 days ange dead attacked dead attacked dead

• Helix aspersa

Limax maximus

2.0 70

73.3

1.0 % 6th 0 4th 0 14th 15th 1.00.0 0.5 96 5 0 4th 1 11 12th 80.0 0.25 # 10 0 5 0 14th 14th 93.3

Example 3

Following the procedure of Example 2 were the following, in the

labeile 2 reproduced results with the gray Jartenachnecke obtain:

Table 2 Effectiveness of L "ri ^ ethylzinnh.yüroxi.i on gray i ^ rten-

snails

Concentration 24 hours 4 b STUN 6 days 7 Tare 7o dead

tion of the befo- re

LIittels grabbed dead dead grabbed dead 7 days

7 0 14 14 93.3

3 0 14 H 93.3

2 2 12 14 93.3

0 1 13 14 93.3

0 0 1 1 6.7

1.0 10 0 2.0 12th C. 0.5 9 Γ; 0.25 1 C. untreated sample 0 G Example 4

/ asserschnecken (Plarorois corneu.s', vuraen the -ri: .. exposed etr.ylzinnhydroxid by the prepared medium [5 ^ in ..asser and isopropanol) the "ater fed donor was contained _f the aie Crganismen. The following xaoelle 3 shows the results obtained:

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Tabel Effectiveness of trimethyltin hydroxide on water

snails

Concentration
tion of the
Means 24 hours killed fo
48 hours 72 hours Triir.ethylainn- hydroxide 2.5 ppm
1.0 ppm 0
0 0
10 0
10 Isopropyl alcohol 40 ppm
untreated sample 0
0 0 10.
0

From the table it can be seen that? irinethyltin hydroxide on, yasser snails has no influence. oo show the result tables clearly the unexpected specific effect of iriethyltin hydroxide aiii 3rd-V / eiclitiere. This hone specific li'effectiveness cei ^ t.; I also with the experiments init Tetrairo *.:.; Izir.n and di ^ ethyltin oxide t'e / en ^ rd-u'eichtiere, »velcfce 7ercindur .._; en ineffective sini free, rlelix aerersa at concentrations before. .-; - * Viirkstcfi.

0 C 9 S: 0/2 2 3 0

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Example 3 - Preparations

A. Typical bait preparation hexamethylditin * bait carrier ** Thickener ***

100.00

* dissolved in acetone to facilitate incorporation ** alfalfa flour, ground wheat bran, yeast or

ground v / calibrating pumice stone *** polyvinyl alcohol

Bo Typical preparation with solvent
Hexairethylditin 20 ^

Xylene 79 %

Triton x-161 (surfactant smock) 1

O , 25 Io 98 , 75 io 1 .00 $>

TÖÖ% C. Typical preparation with wettable powder

Hexamethylditin 25% Fullererae 59 io Petro .7PX (anti-paint agent) "X req
*) / ^ karasrerse Γ, (interfaces
active smock) 3 a Ascorbic acid io io

100%

L. 1 'typical granulate preparation

Hexa-T.ethyldizinn 10%

ground liaison & 7 9ζ

Xylene $ 3

TÖÖ "^

These preparations can be sprayed, dusted or otherwise

applied v / erüen; they can also be in paste form or in a

other - ^ eei ^ re-.e Jorr. _f ': e, .rächt be.

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The evaluations were carried out at about 17 ° C. Each of three experimental set-ups consisted of five animals in a test ■ box, consisting of an open area with moist soil and a covered refuge with wet peat bog. The test bait were made from ground wheat bran with acetone added to dissolve and incorporate the chemicals. A small piece of bait in the middle of the area was the only annual source for the animals in each test box. The recumbent animals (usually attacked by the chemicals) and the dead animals were observed at regular intervals observed. Death was determined by bumping into the immobile Animals with a pencil; death was recorded when there was no contraction.

The following table 4 shows the results obtained:

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Effectiveness of hexamethylditin in fighting snails

CD CD CO

slug

Concentration of

Means

Number of snails after

Hours 4 days 7 days 14 days

an- an-

_o rii ± 'en dead dead attacked dead dead

O Arion ater 1.0 % 0.5 f ° NJ 0.25 fo O Helix aspersa 1.0 fo 0.5 fo 0.25 70 1.0> i 0.5 % 0.25 ^ Limas maxiinus 0.25 · / » si
α
P.

0 5 0 3 0 1 1 3 0 6th 0 3 ü 7th 0 5 1

0
0

2 2

0
1
1

0
1

12th
13th
11

12th
IO
12th
1 1

12th
15th
13th
15th

dead after 14 days

80.0 100.0

86.7 100.0 100, above 100, υ 100.0 100.0

83.3 100.0

CD JSJ

■ Example 7

With each method of Example υ, numerous homologues of hexamethylditin were tested and proportionate ineffective. The results are shown in Tables 5 and ό.

Taoelle brown garden 5 ι i » untreated sample versoi. 7th 1 3gen Helix aspersa 7 days
ange
grip
fen tpt 1 1 Io untreated sample 5 4th 7 days
ange
attacked dead 14th 5 $ dead
after
Days 14th effectiveness various means 1 i ° latum 3 0 corner) 1 1 -5 0 1 4th 2 100, 0 ( honest effectiveness 4th 0 4 days
dead 3 3 ■ j 3 6th 0 33, 3 Tested
middle Concentration 4 &hours;
tion of the
iüitteli- attacked dead 7th 0 5 2 ^ C. 5 1 2 O, ü Hexamethj1 αϊtin 1 ^J L Tested
IJittel 5 0 2 2 3 C. 10 5 0 26, 7th riexaethylaizinn 1 / over Hexamethylditin 10 1 0 4th 3 0 5 3 3 0, 0 Hexapropyl tin 1 * ■ Hexaethyltin 2 0. 1 1 C. 7th 0 0 33, 3 Hexaisobutyl tin 1 ^L jo Hexapropylic tin Tabel 6th - 0 2sen Leroceras 2 '13, 3 Hexabutyl tin these means 1 corner) Hexaamyl tin (gray G-artens ο '■ Concentration 48 hours
tion of the
Means attacked dead reticu- £ 1 1 i « i * dead
after 7
Days 1 p 93.3 Hexaisobutylditin 1; Ä 26.7 Hexabutyl tin 53.3 Hexaamyl tin 6.7 33.3 20.0 0.0

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Example 8

Y / ater snails (Planorbis corneus) were different
Hexaalkylditin compounds exposed by adding the preparations to water that contained the organisms. The following table 7 shows the results obtained:

Tabel 1 PPM 7th after
24 hours
the 48 hours
the Tested
middle preparation
and concentra
tion 2.5 PPK effect
6 hours Hexamethylditin $ 10 in
Gellosolve 5.0 PPI ^ no no 1 PPM $ 10 in
Isopropanol no no no 2.5 PPK 1 PPM no no no 5.0 PPM 2.5 PPM no Hexabutyl tin 5fo in
Isopropanol 5, ο ppi: no no 1 PPM $ 5 in
Isopropanol no blossoms dead 2.5 PPM 1 PPLi no blossoms dead 5.0 PPM 2.5 PKl no Hexaisobutylditin $ 10 in
Diacetone alcohol 5.0 PPM no no _ no blossoms dead no blossoms dead blossoms Hexaprcpylditin no no no no no no no no no Hexaaxyl tin blossoms 2 dead no blossoms dead no blossoms dead no no no Blink attempt no

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From Table 7 it can be seen that only Hexamethyldizxnn and hexapropyldizinn show no effect against water snails, but from Tables 5 and 6 it can also be seen that hexa- ■ propyldizinn shows no noticeable effect against southern molluscs. The tables of results clearly show that hexamethylidizin is unexpectedly specifically effective against earthen molluscs. .

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Claims (6)

Dipl.-Ing. Dip !, oec. publ DIETFiCH -WiN PATENT ADVOCATE 8 mouths 2! - Gc-hardstr. Telephone 56 1762 6th March 1970 5995-I / Tr Pennwalt Corporation, Philadelphia (7.3t.A.) Claim Use of xriGethyltinnhydroxid and Kexamethylaizinn as Liittel against ^ rd -.- gauges. 0 09840/2230 BAD OR5Q1NAL