CA1108047A

CA1108047A - Benzoyl-n'-trichloroethylidene hydrazine derivatives in fungicidal compositions

Info

Publication number: CA1108047A
Application number: CA289,602A
Authority: CA
Inventors: Nobuo Hatakeyama; Keigo Satake; Shiro Yamazaki; Katsumichi Aoki; Susumu Shimizu
Original assignee: Kureha Corp
Current assignee: Kureha Corp
Priority date: 1976-10-28
Filing date: 1977-10-26
Publication date: 1981-09-01
Also published as: GB1569340A; DE2748450B2; NL7711636A; DE2748450A1; ES463598A1; DE2748450C3; FR2369254B1; US4166129A; FR2369254A1

Abstract

ABSTRACT OF THE DISCLOSURE
Novel compounds are described of N-substituted or non-substituted benzoyl-N'-trichloroethylidene hydrazine which may be expressed by the following general formula:

.

wherein R or R' stands for H, halogen atom, CH3, OH, OCH3 or NO2.
The novel compounds may be used in novel agricultural and horticultural fungicides.

Description

BACKGROUND OF THE IN~ENTION
This invention relates to novel compourds of N-substituted or non-substituted benzoyl-N~-trichloroethylidene hydrazine which may be expressed by the following general formula:

~CONHN = CHCC13 R
wherein R or R~ stands for H, halogen atom, CH3, OH~ OCH3 or NO2 It further relates to novel agricultural and horticultural fungicides having, as their effective substance, at least one of the said chemical compounds.
Various and numerous compounds are hitherto known which are originated from substituted ben7oyl hydrazine. Certain reaction products of substituted benzoyl h~lra~ine with chloral are also kIlown. As an example, N~benzoyl-N~-trichloroethylidene hydra2;ine is already described in literature ~refer to Journal of Pharmaceutical Society Of Japan, 85(3), 181 (1~65)~ .
On the other hand, N-2-chlorobenzoyl-N~-trichloroethylidene hydrazine is also known ~refer to Chern. Absts. 47, 3929a (19S3)1 .
Further, 4-methyl and 4-nitro-derivatives are also known [refer to Chem. Absts. 67. 73299 x (1967) ~ .
Ho~,vever, it should be noted that the9e descriptions relate exclusively to the reaction steps and do not refer to any '.

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...

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I
fungicidal function of these compounds in agricultural and horticultural purposes.
Upon careful and profound screening study of these known N-substituted and non-substituted benzoyl-N'-trichloro-ethylidene hydrazine derivatives and novel derivatives synthe-siz;ed by our selves for the first time, we have found that those selected and found by ourselves represent, indeed, remarkable agricultural and horticultural fungicidal effects.
In the following table, our inventive compounds are enli s ted:
Table _ 1 .
No. Structural formula Nomination m. p., C Yield, %

N-benzoyl-~7~ N~-(2, Z, 2~ 194 - 5 C/ ~CONHN - CHCC13 trichloro- (decom- 81 ethy~idene) position) hydrazine N- 2- chloro-,~ benzoyl-N'- 183 - 4 .

2 4 \~CONHN = CHCC13 (2, 2, 2-tri- (decom- 67 chloroethy- position) Cl lidene)hydrà-zine N ~- methyl-benZYl~N~ 172 - 3

3 CH3~ Chloroethy- ( sit on) 48 lidene) hydra- ~ ;~
zine N~ ~ nitro_ benzoyl-N'-

4 NO2~CONHN-= CHCC13 (2,2,2-tri- 169 - 71 chloroethy- (decom- 51 li,dene) hydra- position) zine -to be continued-., " -: " ~ . . . ,-: ~ , .
.: : ~ , : - '; -` '` `''`"'`"- ;', ,. ~
:, :, : . ,: : : .
,:, No. Structurai formula Nomination m. p., C Yield, %
N- 2-bromo-~7~ b enz oyl - N ' -~CONHN = CHCC13 (2, 2, 2-tri- 186 - 8 82 chloroethy- (decom-Br lidene)hydra- position) zine N- 3 - bromo-/~ benzoyl-N'- 158 - 9 6 ~CONHN = CHCC13 (2, 2, 2-tri- (decom- S5 ,~ chloroethy- position) Br lidene)hydra-zine N- 4- bromo-~7~ benzoyl-N'- 184- 5 7 Br~CONHN = CHCC13 (2,2,2-tri- (decom- 14 chloroethy- position) lidene)hydra-zine N- 3- chloro-~ benzoyl-N'- 149 - 50 8 ~CONHN = CHCC13 (2, 2, 2-tri- (decom- 60 ~ chloroethy- position) Cl lidene)hydra-zine N-4-chloro-~5_~ b enz oyl - N ' - 157 - 9 9 Cl ~ CONHN = CHCC13 (2, 2, 2-tri- (decom- 43 ~;;=~ chloroethy- position) lidene)hydra-zine N- 2 - fluoro-~ benzoyl-N'- 185 - 6 ~/ \~CONHN - CHCC13 (2, 2, 2-tri- (decom- 36 Vj chloroethy- position) F lidene)hydra-zine - to b e c ontinu ed _ ~ _ .
" ,1. ,~ ' , :; . : ~ ;. .:

' ': , No. Structural formula Nomination m.p., CYield, %
N- 3- fl~loro-~7~ benzoyl-N'- 179 - 80 11 C~ ~CON~N = CHCCl3 (2,2,2-tri- (decom- 82 j~ . chloroethy- position) F lidene)hydra-zine N- 4- fluoro -~7~ benzoyl~N'- 164 - 5 12 F~--CONHN = CHCC13 (2, 2, 2-tri- (decom- 78 chloroethy- position) lidene)hydra-zine .
N-2-hydro-~ xybenzoyl- 184 - 5 .
13 ~ \~C.ONHN = CHCC13 N'-(2,2,2-(decom- 89 trichloro- position) OH ethylidene) hydrazine N- 4- hydro-~ xybenzoyl- 221 - 3 t 14 HO~ ~CONHN = CHCC13 N'-(2, 2, 2- (decom- 85 trichloro- position) ethylidene) hydrazine N-2-iodo-benzoyl-N'- 203 - 4 ~ ~CONHN = CHCC13 (2, 2, Z-tri- (decom- 82 chloroethy- position) .
. I lidene)hydra-zine N-3-iodo- 1l ~ benzoyl-N'- 1~2 - 3 . ~i`
16~CONHN - CHCC13 ~2, 2, 2-tri- (deco~n- 37 `~~ chloroethy- position) I .
lidene)hydra- I, zine -to be continued -, -.. ... .i~ ~. .

.: . , , - . . .:
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No. Structural formula Nomination m. p., C Yield, %
N-4-iodo-benzoyl-N'- 183 - 4 17 I--~ ~CONHN = CHCC13 (2, 2, 2-tri- (decom- 20 \~ chloroethy- position) lidene)hydra-zine N-2-metho-~ xyb en z oyl -18 ~ ~CONHN = CHCC13 N'-(2, 2, 2- 122 - 3 60 y~ trichloro-OCH3 ethylidene) hydrazine N- 4- metho-~ xybenzoyl-19 CH3Q~ ~ CONHN = CHCC13 N'-(2, 2, 2- 163 - 4 33 trichloro- (decom-ethylidene) position) hydrazine N- 2 - methyl-~ benzoyl-N'- 191 - 2 20 ~CONHN = CHCC13 (2, 2, 2-tri- (deco~- 40 chloroethy- position) ~CH3 lidene)hydra- .
zine N- 3 - methyl-~ benzoyl-N'- 160 - 1 21 ~ ~CONHN = CHCC13 (2,2,2-tri- (decom- 39 >~ chloroethy- position) CH . lidene)hydra-3 zine N- 2 - nitro-~ benzoyl-N'- 167 - 8 22 ~ ~CONHN = CHCC13 - (2, 2, 2-tri- (decom- 77 chloroethy- position) NO2 lidene)hydra-zine - - to be continued -_ : , ,,:
.. :: : :. ., . :
`: `
:-.. 1 No. Str~lctural :Eormula Nomination m.p., C Yield,% '~
Cl N- 5- chloro-2 - hydr oxy- 1~ 4 - 6 Z3 ~ ~GONEIN = CHGCl3 benzoyl-N'- .(decom- 73 (2, 2, 2-tri- position~
OH chloroethy-lidene)hydra-zine N-2-chloro-4-,~ nitrobenzoyl- 170 - 1 24 NO~ CONHN = GHCC13 N'-(2,2, 2-tri- (decom- 83 chloroe$hyli- position) Cl dene)hydrazine N-2, 4-dichlo-robenzoyl-N'- 181 ~ 2 Cl~CONHN = CHCCl3 (2,2, 2-trichlo- ldecom- 70 y~ roethylidene) position) Cl hydrazine N-Z, 5-dichlo-Gl~ robenzoyl-N'- 167 - 8 26 ~ ~CONHN = CHCC13 (2, 2, 2-trichlo- (decom- 57 y roethylidene) position) !`
Cl hydrazine N-3, 4-dichlo-robenzoyl-N'- 170 - I
27- Cl~CONHN = GHCC13 (2,2,2--trichlo-~decom- 42 ,~ roethylidene) position) .
Cl ~ hydrazine .
N-3, 4-dime- .
thoxybenzoyl- 218 - 20 28 CH3O~ ~CONHN - CHCC13 N'-(2,2,2- (decom- 25 ~ trichloroethy- position) CH3O lidene)hydra_ zine NO2 N-3, 5-nitro- j ~ benzoyl-N'- 191 - 2 29 NO2 ~ ~CONHN = CHCC13 (2, 2, 2-trich= (decom- 68 ~~ loroethylidene) position) hydrazine Remarks: Compounds 1- 4 ~re known and Compounds 5 - 29 are llnknown;
.

::. ~ . -, . . . " . ~,, For the preparation of the foregoing compounds, the procedure may follow substantially in the following ormwla:

R 3~Co;~HN~2 -~ Cl3CCHO

~CONHN = CHCC13 wherein R or R' stands for H, halogen, CH3, OH, OC~I3 or NO2;

Or, more specifically, the corresponding acid hydrazide and chloral are refluxed in benzene for 1 - 3 hours easily to form the desired corresponding product In the following, several preferred manufacturing examples will be given for more clear and easy understanding of the invention.
Example Preparation o N-benzosrl-N'- (2, 2, 2-trichloroethylidene)hydrazine ~Compound No 1) 10 g (0. 073 mol) of benzoylhydrazine were suspended in benzene, 200 ml, and 18. 3 g t- 124 mol) of chloral were added dropwise to the suspension which was then refluxed under C c~/. ng agitation for 3 hours. Upon ~01~L, the sedimented crystals were collected by filtration and washed well with benzene. In , . : :-: .
.. :- , , ..., .., ., , :,. -' : :: : :: ; : ,, ~

this way, white brown crystals, 19 g, were obtained substantially quantatively }n. p. 188 - 189C (decomposed). When recrystallized from acetone, the C;ompound No. 1, m.p. 194 - 195 (decomposed), was obtained in white needles. Yield: 15.4 g (81% of the theo-5retical).
Synthetic Example 2 - Preparation of N-Z-bron~obenzoy~-N'-(2, 2, 2-trichloroethylidene)hydrazine (Compound No. 5) ~. 2 g ~0. 02 mol) of Z-bromo benzoyl hydrazine were suspended ir~ benzene, 80 ml, and chloral, 4 7 g (0. 03Z mol), were added drop~vise thereto The reaction mixture ~,vas then refluxed under heating and agitation for 4 hours and under sepa-q,~ 5 ~oo~l'n~
C ration of the formed zrg~6 product. Upon e~, the sedi-cts//ec~
mented white crystals were ~ted by filtration. These crystals were then recrystallized frorn a small a~nount of .^
benzene, thus the Compound No. S being obtained in white crystals. m.p 186 - 188C; Yield 5.6 g (82% of the theo-retical) .
Synthetic E~ample 3 Pre~ration of N-2-~luorobenzoyl-N'-(2, 2, 2-trichloroethylidene)hydraz;ne (Compound No 10) Z. 3 g (0. 015 nnol) of 2-fluoro benzoyl hydrazine were suspended in ben~ene, 60 ml~ and 3. 5 g (0. OZ4 mol) oE chloral _ 9 _ ';
- ~ , .,:

' ~

were added drop~,v;se thcreto.
Then, the reaction mixture was refluxed under heating and strong agitation for 3. 5 hours, thereby the formed water C~
being separated therefrom. Upon e~ the sedimented crystals were collected by iltration and recrystallized from ethanol. I~ this way, the Compound No. 10 was obtained in weak yellow fine crystals. m.p.: 185 - 186C (decomposed).
Yield: 1. 5 g ( 36% of the theoretical).
Synthe ti c Example 4 Preparation of N-4-fluorobenzoyl-N'-(2,2,2-trichloroethylidene~ hydrazlne ( Compound No. 12 ) 2. 3 g ( 0. 015 mol ) of 4-fluoro 3:)enzoyl hyd~azine were suspended in benzene, 70 ml, and chloral, 3. 5 g ( 0. 024 mol) was added dropwise thereto. Then, the reaction mixture was refluxed under heating and strong agitation for 3, 5 hours, thereby the formed water being separated therefron~.
coo~ g Upon ~, the sedimented fine crystals were collected by filtration and recrystallized from benæene. In this way, the Compound No. 12 ~ obtained in fine yellow crystals~ m. p.: 164 - 165C. Yield: 3. 3 g ~78% of the theoretical ).
Synthetic Example 5 Preparation of N-3-iodobenzoyl-N'_ ~5 ( 2, 2, 2-trichloroethylidene ) hydrazine - 10 - ~

j~

'' '' ' . ' :

:

( Conlpound No. 16 ! 11~ 4-7 2. 6 g ( O. 01 mol ) of 3-iodo ~enzoyl hydrazine ~ere suspended in benzene, 100 ml, and chloral, 2. 4 g ( 0. 016 mol, ) was added dropwise thereto. Then, the reaction mixture was refl~lxed under heating and strong agitation for 7. 0 hours, thereby the formed water being separated therefrom.
CJ o/~ n~
C Upon e~e~, a srnall amount of insoluble constituent was filtered off and the mother liquid was condensed to obtain fine yellow crystals which were then washed with a sr~all amount of benzene. In this way, the Compound No. 16 was obtained in fine white crystals. m.p.: 162 - 163~C. Yield:
1. 5 g (37% Of the theoretical).
Synthetic Example 6 Preparation of N-2-rnethvlbenzoyl-N'- -( 2, Z, 2 - trichlor oeth~,rlidene ~ h~drazine ( Compound No. 20 ) 10. 2 g ( 0. 068 mol) of 2-methylbenzoylhydrazine were suspended in benzene, 200 ml, and chloral, 16. 2 g (0.11 mol) was added dropwise thereto. Then, the reaction mixture was refluxed under heating and strong agitation for C~tl-~74 3 hours. Upon e~ the sedimented fine and white brown crystals were filtered off and ~,vashed with benzene.
Then, these crystals were recrystallized from ethanol to obtain the- Compound No. 20 in white crystals.
m.p.: 191 - 192C (decornposed). Yield: ~.4 g (4~% of - ~

the theoretical). ~ 7 Synthetic Example 7 Preparation of N-Z-nitrobenzoyl-N'-(2, 2, 2-trichloroethylidene)hydrazine (Cornpound No. 22) 1.8 g (0.01 mol) of 2-nitro benzoyl hydrazine w~re suspended in benzene, 70 ml, and added dropwise with 2. 4 g (0. 016 mol) of chloral. Then, the reaction mixture was refluxed c~ o /~V.3 under heating and strong agitation for 3 hours. Upon c~l~, the sedirnented white fine crystals ~,vere filtered off and washed well with benzene. In this way, the Compound No. 22 was obtained. m.p.: 167 - 168C (decomposed). Yield: 2.4 g (77% of the theoretical).
Synthetic Example 8 reparation of N-3,4-dichlorobenzoyl-N'-(2, 2, 2- ,richloroethylidene)hydrazine '-(Compound No. 27) 4 g (O. 02 mol) of 3,4~c~ichloro benzoyl hydrazine were suspended in benzene, 80 ml, and a'dded dropwise with chloral, 4. ? g ~0. G32 mol).
Then, the reaction ~ ture was refluxed under heating and strong agitation and the residual benzene was distilled off under reduced pressure, to provide weak yellow fine crystals.
These crystals were then xecrystallized from isopropanol. In this way, the Compound No. 27 was obtained in white fine crystals.

~ --~,, , .: - ,.. ., ., :. . ... .~,: ;
.,: ~'.',' ' , . . -, :

m.p.: 170 - 171C (decomposed). Yield: 2.8 g (42% of the theoretical ).
It has been found that the N-substituted benzoyl-N'-trichloroethylidene hydrazine derivatives have a superior fungicidal control power over various and numerous plant disease-inviting fungi, especially those of rice blast; cucumber and grape downy mildew; tomato and potato late blight; cucurnber grey mold, wheat leaf :rust and the like.

1, .. ..
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It should be further noted that the inventive derivatives do not include any heavy metal which gives rise to human and animal health problems to which recently a grave social attention is directed. On the other hand, these derivatives show continued and standing control po~,ver over various plant diseases and gellerally capable of controlling at least two or more plant diseases derived from the fungous origin. These chem;cal compounds may be applied as per se or in the form of wettable powder, solution, suspension, emulsion or the like, as occasion may desire, by mi~ing with conventional liquid vehicle or solid or liquid carrier or diluent.
When the inventive derivatives are used as the fungicides or plant disease control agents, any of these derivatives may be added with suitable conventional additive(s) acting as spreader(s), 1 ' developer(s), emulsifier(s), wetting agent(s), adhering or sticking Cc~5~ w7 ~2 r~
agent(s) and/or the like, as ~.
Addition of other known medicament(s) is also allowable for more assuring the desired effect and with no fear of deterio-lation or decomposition of the effective control agent(s) according to the invention. As an example, such additional medicament may be other known fungicide, insecticide or fertilizer.
In the following, several preferred numerical es~amples of applicable composition including the effective substance(s), as well as plant disease control effect, for clearer understanding of the invention. The parts are given by weight, These parts .:

.
t .,: , . .

8~iL7 are shown only by way of example and thus not limitating.
- Composition Example 1 Powdery Composition Parts t~ompound No. 1 ;................................ 3;
clay ........................................... 40;
~a/c .............................,,.,.......... 57;
.
The above constituents are mixed and finely pulverized to provide , an applicable powdery blastable composition.
Composition Example 2 ~ettable Powdery Composition Parts Compound No. 2 ................................. 50;
polyoxyethylene allcylaryl ether ................ 6; 1 kieselguhr ..................................... 44;
These constituents are mis~ed together and well pulverized. The resulted powder can be applied with spray;ng means, upon .vith a proper amount of water.
Plant Test Example 1 Rice Blast Control Test on Planted Pots Three groups of pots, each group consisting of 30 pots, each pot having a diameter of 10 cm, were used. Japanese rice plants, Oryza sativa L, variety: SASANISHIKI, of four leaf stage, were cultured in these pots. Each pot was planted with twenty stems of the rice plant. These plants were well applied with c ' ' : `
' ' the wettable powder as set forth in the foregoing Composition E~ample 2, upon diluted with ample amount of water to desired concentration to provide an aqueous suspension. The suspension was applied onto the plants by means of a liquid spray to such C ~ S degree that all the leaves were well wetted. Upon ~L, the leaves were inoculated with spores of rice blast fungi, Piricularia or~ae~ by spray of an aqueous suspension thereof. Then, the treated pots were placed in high humidity atmosphere at 27 - 28C
for four days.
Uppermost leaves of rice plant stems per three pots were precisely reviewed and the observed number of lesions were counted. Equal nun~ber of pots having untreated with the fungicidal suspension were equally inoculated as the control, and the number of lesions was counted, and the control rate was found by the following formula.
number of lesions on treated leaves Control rate, % = ( 1 ~ number of lesions on untreated leaves The thus determil~ed results are shown in the following Table 2.
, _ 16 -:;
.~

, Table 2 Com- Test Group 1 Test ~roup 2 Tesl Group 3 Thyto-pNuOnd Gonc., *1 **2 *1 **2 *1 **2 tox -~P ~ , ,,~
No. 1 500 0 100 nolle No. 2 ll 0 100 .- r No. 3 ll 0 100 ..
No. 4 ll 9o : 88. 6 -No. 5 ll 0 100 No. 6 ~l 0 100 No. 7 ll 0 100 No. 8 ll 0 100 .-No. 9 ll 79 9 1 . 0 No. 10 tl 0 100 No. 11 I~ 0 100 No. 12 1~ 0 100 No. 13 It 0 100 No. 15 ll () 100 No. 16 ll 0 100 No. 17 ~ 23 97.7 No. 20 ll . o 100 No. 21 ll 0 100 ll No. 22 . I~ 69 92 . 1 ~ It No. 23 . " . 101 88 . 5 "
No. 24 ll 8S 90. 3 No. Z5 ll 7 99. 2 No. 27 ~ 0 100 ~r No. 28 ll 135 84. 6 No. 29 ll 17 S80 . 1 tr eated _ 7 9 ~ l 87 3 99 9 _ Remarks: *l .. . Affected spots n~rnber;
**2 . .. ControL rate, %

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Plant Test E~ample 2 Pot Test for Control of ~owny Mildew on Cucumber Plants .
~ number of pots of 10 cm diameter, were used forthe c~lture of cucumber plants of t~vo leaf stage, variety: SAGAMI
hampaku. Each plant was planted in a pot. Each three pots were grouped into one treating group. These plants were applied withj an aqueous suspension of the wettable powder, as set forth in Composition E}~ample 2, upon diluted with water. The appli-~yln~
r~ 10 cation was made by means of a liquid spray. Upon ~3 all ~; :
the leaves ~,vere inoculated with spores of downy mildew fungi, Pseudoperonospora cubensis, by spraying. Thenj, the plants were kept in high humidity atmosphere at 22 - 23G for 24 hours, - and then in a green house for 5 days. After lapse of 5 days upon said inoculation, the degree of infection was deterrIIined by con-sultation with the following classi;fication, as per one leaf per pot and per three pots for each treating district.
Clas sification .
Inde~ of 20Infection State of Infection "0" no infection "0. 5" less than 10% infection in terms of inoculaterl leaf area "1" 10 - 20% infection in terms of inoculated leaf area.
"2" 20 - 40%, infection in terms of inoculated leaf area.
"3" 40 - 60% Infection in terms of inoculated leaf area.
4ll 60 - 80% infection in terms of inoc~llated leaf area.
"5" o~er 80,~o infection in ter~ns of inoculated leaf area.
! ._,j - . : .

The test results are shown in the following Table 3.
Tabl e 3 Phyto - r Compound No. Conc., ppI~I Index of Infection, ~lean toxicity No. 1 500 0none 2 " 0. 5tl 3 " 0 "
4 " 1 "
~' 0 6 " 0. 5"
7 ~ 0 "
8 " 0 "
- 9 " 2 tl 1 1 " 0 .5 13 " 1 "
14 "
. 2 16 ~ . 1 tl 17 " 1 ~1 19 ~' 0 ~
" 0 "
~' 0. ~"
27 " 0 "
28 " 3 Non- treated ~ 5 ; - 19 -. .. : . .. -. . :
; ~, .: . .. .
. ~ . , ,, ; , , , ,:~ ,! . . ~ ~ ' Plant Test Example 3 Pot Test for the Control of Late 13li~ht on Tomato Plants A number of pots, each being of 10 cm diameter as before! were planted each with a tomato plant at its four lea:E
sta~e, variety being FUKUJU No. 2. Each eight pots were grouped into one treating district. The cultured plants were sprayed with an aqueous suspension of the wettable powder as set forth in the foregoing Composition Example 2. An aqueous suspension of spores of tomato late blight fungi, Phytophthora infestans, preparatorily cultured on potato tubers were sprayed over the above treated tomato leaves upon dried. The thus conditioned plants were kept in a green house at 20 - 22C for two days. After lapse of four days after the said inoculation, the index of infection was deternnined inaccordance with the foregoing classification, so as to fix the respective mean index of infection per plant. The test results are shown in the follow-ing Table 4.

- : l ~ . . . ~ :

T~Lbl e 4 Phy~o-CorIlpo~lnd No. Gonc., ppm Index of Infection, Mean toxicity . No. 1 500 0 None 2 ll 0.5 ..
3 " 0 "
4 " 0 . 5 "
" 0 "
6 l~ 0. 5 ., 7 " O. S "
1 0 " Q "

1'~. "
13 " 1 "

17 " 2 "
18 " 2 "
19 " 0 "
1- 0 "
22 " 2 t 23 " 1 l~
2~ " 0 . 5 "
2S . "
Z6 " 1 l' Non-t:~eated ~ 5 - 21 _ , . .

Plant Test Example Pot Test for the Control of L_e Bliaht on Po~ato Plan~s ~ number of pots, each being of 10 cm diameter as before were planted with potato plar~ts, variety bcing DANSHAKU, in one-to-one correspondence. Each three pots were grouped into one treating district. These plants were sprayed with an aqueous suspension of the wettable powdery composition as set forth in the Composition Example 2 which was suspended in water to desired concentration.
d~l ing After ~, an aqueous suspension ofsporesof potato late i $ 1~ ght fungi which had been preparatorily cultured on potato tubers, was sprayed over the planted and pretreated potato leaves by spraying for inoculation. Then, the inoculated plants were held in high humidity atmosphere at 18 - 22C for two days and then cultured further in a green house. After five days upon inoculation, the degree of infection was determined as was classified in the foregoing Plant Test Example Z. The mean degree of infection per pot is shown in each case in the follow-ing Table 5.

-~ ~J - 2 2 : : . ~: ~

Table 5 Phyto-Compound No. Conc., ppm Index of Infection, Mean_ toxicity ~o. 1 500 0 none 2 " 0. 5 "
" 0 "
7 ' 0.5 ., " O
1 1 '~ o l S " 0 5 1~ 17 " 1 "
1 8 " 2 "
21 " 0.5 24 " 0. 5 "

1S 28 " 2 Non- treated -- 5 "
Plant Test Example 5 Pot Test for the Control of Gray ~vlold on Cu cumb e r Plant s . .
A nu}~ber of po-ts, each being 10 cm ~.-lian~eter as ~, before were planted with cucumber plants, variety being SAGAMI
HAMPAKU, at its two leaf ,stage in one-to-one correspondence.
Each three pots were grouped into one treating district. These plants were sprayed with an squeous suspension of the wettable powder as set forth m the foregoing Composition Example Z.

:: , - ''-, :``''' ' ` :

"; ` `
.

'7 . . .
After dried, cucumber gray mold fungi, Botrytis cinerea ~ersoon, preparatorily culturecl on a sugar-added potato-extract-agar culture medium at 20C for five days, were fixedly attached to each leaf in the ratio of t~,vo circular discs of the hlngi-containing agar medium, being of 5 mm diameter, for the exec~ltion of inoculation. After inoculation, the treated plants were placed in a green house at 22 - 23C for five days. The infected leaves were reviewed precisely for the determination of the mean diarneter of lesions in mm~
l 0 Clas s if ication Index of Infection State of Infection "0" no infection "0. 5" less than 10% infection in terms of inoculated leaf area.
"1" 10 - 20% intection in terms o inoculated leaf area.
"2" 20 - 40% infection in terms of inoc~llated leaf area.
"3" 40 - 60% infection ir~ terms of inoculated leaf area.
"4" 60 - 80% infection interms of inoculated leaf area.
"S" over 80% infection in terms of inoculated leaf area.
The test results are shown in the following Table 6.

.- : : .: : , ~ : . : .
: : . : : ,: : , , . , ,: , .:

; . ~, . ~. , Table 6 Phyto-Compound No. Conc., ppm Index of I_fection, Mean toxicity No. 1 500 o - none Z " O
3 " 0 . 5 "
' - 2 "

"
6 " o.5 7 " 0 "

9 " 1 ~
1 0 " "
1 1 ~' o 1 2 " 2 "
13 " 0. 5 "
1 ~ " ' O "
1 6 " 0 "
1 7 " 2 "
19 " o. 5 "
2 0 " 0 "

22 " 0 "
2 5 " 0 "
26 " 2 "

Non- treated -- 5 .

`
- : . ':': ~ - : , ~. ' . : .

. .

Plant Test Exarnple 6 Pot_Test for the Gontrol of Red Rust on Wheat Plants A number of pots, each being of 10 cm diameter as before were planted with wheat plants, of three leave stage, variety being NORIN No. 64. Each pot had 16 stems. These plants were sprayed ~,vith an aqueous suspension of the wettable powdery composition, as of the foregoing Composition Example 2, of C~I h~
desired concentration. Upon ~, an aqueous suspension of r~ ~' ' s~oresofwheat red rust fungi was spray~ed over the pretreated plant leaves, for inoculation and held in high humidity atmos-phere at 20 - 25C for 24 hours. Then, the pots were preserved ' -in a green house for 7 days. Then, each ten stems were precisely revîewed and the index of infection was measured. Then, the ¦
Inean value of index of infection per leaf was determined in accordance with the classification set forth in'Plant Test Example 2. The results are shown in Tabl~ 7.

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L`7 Table 7 Phyto-Compound No. Conc., ppm Index o:f Infection, Mean toxicity No. 1 500 0 none 3 " 0 "
1l 0 "
6 " 0. 5 "
8 " 0. S "
9 " 0 1 2 " 0 "
14 " 2 "
18 " 2 "
19 " 0 5 " 0 "
23 " 1 1 5 2~ " 1 It 27 "` 1 Non- treated ~ 5 . P nt Test Example 7 Pot Test for the Control of ~lo~srny Mildew on rape Plants A number of pots were planted with grape plant seedlings of two year's culture, variety being NEOMASCUT. These plants were spxayed with an aqueous suspension of the wettable powdery composition as of the foregoing Composition Example 2 to such a degree that all o, the leaves were well wetted.
Upon dried, these plants were .~ .

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i sprayed with an aqueous suspension of pores of grape do~.vny mildew fungi, Plasmopara viticola (Barkeley et Curtis) Berlese . et de Toni, for inoculation, and held in high humidity atmos-phere at 18 - 23C: Then, the pots were preserved in a green house for lQ days. Each five leaves were revlewed precisely and the ~nean value of infection index was determined per leaf.
The results are shown in Table 8.
Table 8 Phyto -Compound No. Conc., ppm Index of Infection, Mean _x~y 10 No. 1 1, 000 0 none 2 " 0. 5 "
3 " 0 "
" 0 "

9 " 0 "
11 " 0. 5 " l, 1 2 " 0 " I
lS " 2 "
16 " . 0. 5 "
19 " 0 "
21 " 0. 5 "
22 1l 0 27 " 0 "
Non- treated -- 4 "

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Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. An agricultural and horticultural fungicidal com-position having as its effective substance a compound selected from the group consisting of N-2-chlorobenzoyl-N1-trichloro-ethylidene hydrazine, N-benzoyl-N1--trichloroethylidene hydrazine, N-4-Methylbenzoyl-N1-trichloroethylidene hydrazine and N-4-nitrobenzoyl-N1-trichloroethylidene hydrazine in association with a solid or liquid carrier or diluent.

2. The composition as claimed in claim 1, including one or more additives selected from the group consisting of emulsifiers, wetting agents, adhering agents, developing agents and spreading agents.