Rhone-poulenc Agrochimie

Philagro S.a.

Pepro, Societe Pour Le Developement Et La Vente De Specialities Chimiques

Stephane Trinh

Jean-Michel Gaulliard

Alain Moraly

Jean-Claude Debourge

Guy Borrod

Daniel Jean Pillon

Francois Guigues

Andre Disdier

2-Methylenesuccinamic acid compounds are useful plant growth regulants, e.g., are useful in regulating the growth of soya crops.

2-Methylenesuccinamic acid compounds as plant growth regulants

The invention relates to new 2-phenyl-4-pyrone derivatives which can be used in agriculture. They correspond to the general formula: ##STR1## in which X.sub.1 and X.sub.2, which are identical or different, each represent a hydrogen or halogen atom, with the proviso that at least one of these substituents represents a halogen atom, R.sub.1 represents an alkoxy radical (C.sub.1 -C.sub.4), an alkenyloxy radical containing from 2 to 4 carbon atoms, a propargyloxy radical, a halogenoalkoxy radical (C.sub.1 -C.sub.4), an amino radical, an alkylamino radical (C.sub.1 -C.sub.4) or a dialkylamino radical in which each of the alkyl parts, which are identical or different, contains from 1 to 4 carbon atoms, R.sub.2 represents a halogen atom, an alkyl radical containing from 1 to 5 carbon atoms, an alkoxy radical (C.sub.1 -C.sub.4), an alkenyloxy radical (C.sub.3 -C.sub.4), an alkynyloxy radical (C.sub.3 -C.sub.4), an alkylthio radical (C.sub.1 -C.sub.4), a halogenoalkyl radical (C.sub.1 -C.sub.4), a halogenoalkoxy radical (C.sub.1 -C.sub.4), a halogenoalkylthio radical (C.sub.1 -C.sub.4) or the nitro, hydroxyl or cyano radical and n is an integer which can be equal to 0, 1, 2, 3, 4 or 5, it being understood that, if n is greater than or equal to 2, the substituents R.sub.2 can be identical or different. They can be used for protecting plants against fungal diseases.

2-Phenyl-4-pyrone derivatives, their preparation and their use as

Fungicidal compositions are disclosed which contain as active material at least one compound of the formula ##STR1## IN WHICH EACH OF R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 may be identical or different and represent hydrogen, alkyl or halogenated alkyl containing 1 to 5, and preferably 1 to 3 carbon atoms, M represents hydrogen, a metal, an ammonium radical, an alkyl-ammonium radical or an alkanol-ammonium radical, and n is a whole number equal to the valency of M.

Phosphite-based fungicide compositions

Fungicidal compositions are disclosed which contain as active material at least one compound of the formula ##STR1## AND ##STR2## IN WHICH EACH OF R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 may be identical or different and represent hydrogen, alkyl or halogenated alkyl containing 1 to 5, and preferably 1 to 3 carbon atoms, M represents hydrogen, a metal, an ammonium radical, an ammonium radical or an alkanol-ammonium radical, and n is a whole number equal to the valency of M.

Fungicidal compositions, optionally contain chlorinated N- (2,4,6-trimethhenyl)-maleic imides as active material. Such materials find use for controlling fungus disease in plants, especially in agriculture, viticulture, arboriculture, market-gardening and horticulture.

Growing community of inventors

Champagne au Mont d'Or, France

Stephane Trinh