A technique for inducing tolerance to environmental stress in a plant is provided. Tolerance to environmental stress in a plant is induced by applying to the plant an abscisic acid-like substance, such as abscisic acid and agonists thereof, in combination with a nitrogen-containing compound, such as amino acids and amino acid derivatives.

A method of treating a leguminous plant crop comprises a step of applying a 2-chloroethylphosphonic acid solution to the leguminous plant once a seed stage is observed. The solution of 2-chloroethylphosphonic acid may comprise nitrogen and zinc. The 2-chloroethylphosphonic acid solution may also comprise a spreader-sticker. Application of the 2-chloroethylphosphonic acid solution shortens plant maturation and significantly reduces the timing to reach a harvesting stage.

A method of treating a leguminous plant crop comprises a step of applying a 2-chloroethylphosphonic acid solution to the leguminous plant once a seed stage is observed. The solution of 2-chloroethylphosphonic acid may comprise nitrogen and zinc. The 2-chloroethylphosphonic acid solution may also comprise a spreader-sticker. Application of the 2-chloroethylphosphonic acid solution shortens plant maturation and significantly reduces the timing to reach a harvesting stage.

It is to provide a method which does not have problem with safety and enables controlling various pests even at a low dosage, and a pest control agent composition and a pest control agent set which are suitable to be used for the method. At least one selected from a compound of formula (I) (wherein, R.sup.1 represents a hydrogen atom, a substituted or unsubstituted C1-6 alkyl group, etc., R.sup.2 represents a hydrogen atom or a C1-6 alkyl group, R.sup.1 and R.sup.2 optionally form a C2-6 alkylene group together, R.sup.3 and R.sup.4 each independently represent a hydrogen atom or a C1-6 alkyl group, R.sup.5 represents a substituted or unsubstituted C1-6 alkyl group or a substituted or unsubstituted C2-6 alkynyl group, Y represents a C1-6 haloalkyl group, X represents a halogeno group, a C1-6 alkyl group, or the like) and a salt thereof is used with an insecticidal or acaricidal active component.

##STR00001##

It is to provide a method which does not have problem with safety and enables controlling various pests even at a low dosage, and a pest control agent composition and a pest control agent set which are suitable to be used for the method. At least one selected from a compound of formula (I) (wherein, R.sup.1 represents a hydrogen atom, a substituted or unsubstituted C1-6 alkyl group, etc., R.sup.2 represents a hydrogen atom or a C1-6 alkyl group, R.sup.1 and R.sup.2 optionally form a C2-6 alkylene group together, R.sup.3 and R.sup.4 each independently represent a hydrogen atom or a C1-6 alkyl group, R.sup.5 represents a substituted or unsubstituted C1-6 alkyl group or a substituted or unsubstituted C2-6 alkynyl group, Y represents a C1-6 haloalkyl group, X represents a halogeno group, a C1-6 alkyl group, or the like) and a salt thereof is used with an insecticidal or acaricidal active component.

##STR00001##

The present application relates to compositions comprising 4-chloroindole-3-acetic acid (4Cl-IAA) or an analogue thereof, or a combination of the latter, in the form of a potassium salt, a sodium salt or an amine salt. For example, such compositions can be used used in methods for selectively causing damage or mortality to weed.

The present application relates to compositions comprising 4-chloroindole-3-acetic acid (4Cl-IAA) or an analogue thereof, or a combination of the latter, in the form of a potassium salt, a sodium salt or an amine salt. For example, such compositions can be used used in methods for selectively causing damage or mortality to weed.

A plant treatment composition comprising: an aqueous phase comprising a plant nutrient; and an organic phase comprising a substituted urea or substituted thiourea compound, dissolved in an organic solvent; and an emulsifier; wherein the composition is in the form of an emulsion having droplets of the organic phase dispersed in the aqueous phase.

A plant treatment composition comprising: an aqueous phase comprising a plant nutrient; and an organic phase comprising a substituted urea or substituted thiourea compound, dissolved in an organic solvent; and an emulsifier; wherein the composition is in the form of an emulsion having droplets of the organic phase dispersed in the aqueous phase.

Compositions and method for producing a systemic acquired response (SAR) in plants. The resulting SAR may improve plant health and corresponding yields. In an example, the composition comprises a base solution and an effective amount of chitosan (Aspergillus niger) (e.g., in an amount of about 0.04 wt % of the composition). The base solution may include organic material, vitamin K compound, and nitrogen. Additionally or alternatively, the composition may include adding to the composition at least one of potassium, phosphorus, or an acidic organic polymer. Still further, the composition may include a micronutrient comprising at least one of boron, calcium, copper, iron, manganese, sulfur, silicon, or zinc. The composition may be applied as a foliar spray or used to irrigate the plant.