阅读说明：本技术 一种颗粒状可食用杀虫剂组合物 (Granular edible pesticide composition ) 是由 谭江艳 吴贤兵 高丽 张红艳 于 2018-08-27 设计创作，主要内容包括：一种颗粒状可食用杀虫组合物,包括亲水性物质的连续亲水性基质相,分散在H中的不连续亲油相；所述连续亲水性基质相为颗粒状和水,所述基质相适合于害虫；和亲油性基质相,包括亲油性载体和农药,优选溶解在亲油性相中；包括70～95％重量的亲水性基质相,包括水和亲油相的5～30％重量。包括基于农药的亲油相重量的0.0％至33％重量；颗粒具有至少500克的单独压碎强度；亲油性相包括一个或多个亲油性载体,所述亲油性载体选自氯化烃、聚亚烷基二醇。(A granular edible pesticidal composition comprising a continuous hydrophilic matrix phase of a hydrophilic substance, a discontinuous lipophilic phase dispersed in H; the continuous hydrophilic matrix phase is granular and water, and the matrix phase is suitable for pests; and a lipophilic base phase comprising a lipophilic carrier and a pesticide, preferably dissolved in the lipophilic phase; comprises 70-95 wt% of hydrophilic matrix phase, and 5-30 wt% of lipophilic phase. Comprising from 0.0% to 33% by weight, based on the weight of the oleophilic phase of the pesticide; the particles have an individual crush strength of at least 500 grams; the lipophilic phase comprises one or more lipophilic carriers selected from chlorinated hydrocarbons, polyalkylene glycols.)

1. A granular edible pesticidal composition characterized by: a continuous hydrophilic matrix phase comprising a hydrophilic species, a discontinuous lipophilic phase dispersed in H; the continuous hydrophilic matrix phase is granular and water, and the matrix phase is suitable for pests; and a lipophilic base phase comprising a lipophilic carrier and a pesticide, preferably dissolved in the lipophilic phase; comprises 70-95 wt% of hydrophilic matrix phase, and 5-30 wt% of lipophilic phase. Comprising from 0.0% to 33% by weight, based on the weight of the oleophilic phase of the pesticide; the particles have an individual crush strength of at least 500 grams; the lipophilic phase comprises one or more lipophilic carriers selected from chlorinated hydrocarbons, polyalkylene glycols.

2. A granular edible pesticidal composition according to claim 1, wherein: the lipophilic phase comprises a chlorinated hydrocarbon of at least 12 carbon atoms and having a degree of chlorination of at least 40%.

3. A granular edible pesticidal composition according to claim 1, wherein: the hydrophilic substance is selected from the group consisting of processed or unprocessed grain, blood, bone, and animal waste.

4. A granular edible pesticidal composition according to claim 1, wherein: the maximum size of the particles is between 0.5 and 10 mm.

5. A method of controlling ground pests in an area, comprising: comprising placing the pesticidal particulate composition according to claim 1 adjacent to or below the surface of soil.

6. A process for preparing a pesticidal particulate composition according to claim 1, characterized in that: comprising mixing water with a hydrophilic phase to form a deformable dough; spraying the lipophilic phase onto the hydrophilic phase and mixing; forming the mixture into granules; drying the granules to mechanical integrity; the hydrophilic material comprises fibers and the particles are formed by extrusion.

Technical Field

The present invention relates to formulations for delivering pesticides and methods of making these formulations. In particular to a preparation which is edible and exerts insecticidal activity when the pests eat the preparation.

Background

Edible pesticide compositions have been widely used for pest control. In such formulations, loss of active agent is a problem with the efficacy and environmental safety of the composition. The pesticide is typically released into the environment and is wasted (removed or destroyed) through processes such as volatilization, binding with clays or organics, microbial degradation, chemical attack, and leaching. This significantly reduces the useful life of the edible pesticide formulation. Another problem caused by edible pesticide compositions is that pesticides are generally toxic to the organisms benefiting the pests, but do not cause feed damage in their own right. The presence of residual sublethal quantities of insecticide can lead to the development of resistance in pest populations to the insecticide as it is lost. This problem can be exacerbated by slow release formulations that create significant areas or "hot spots" of "sub-lethal pesticide concentrations". Although the slow release of pesticides from these formulations increases the useful life of the edible pesticide formulations, it does not address the problem of damage or resistance to the establishment of non-target organisms. Many durable hydrophobic matrix materials (e.g., ethylene-vinyl acetate copolymers) are not consumed by pests and therefore cannot be used to provide edible pesticide formulations.

Disclosure of Invention

It is an object of the present invention to overcome the above-mentioned deficiencies of the prior art by providing a particulate edible pesticidal composition which can maintain its form in the soil for a period of 1 to 3 years, including a number of wet/dry cycles.

The technical scheme of the invention is as follows: a continuous hydrophilic matrix phase comprising a hydrophilic species, a discontinuous lipophilic phase dispersed in H; the continuous hydrophilic matrix phase is granular and water, and the matrix phase is suitable for pests; and a lipophilic base phase comprising a lipophilic carrier and a pesticide, preferably dissolved in the lipophilic phase; comprises 70-95 wt% of hydrophilic matrix phase, and 5-30 wt% of hydrophilic phase. Comprising from 0.0% to 33% by weight, based on the weight of the oleophilic phase of the pesticide; the particles have an individual crush strength of at least 500 grams; the lipophilic phase comprises one or more lipophilic carriers selected from chlorinated hydrocarbons, polyalkylene glycols.

The lipophilic phase comprises a chlorinated hydrocarbon of at least 12 carbon atoms and having a degree of chlorination of at least 40%.

The hydrophilic substance is selected from the group consisting of processed or unprocessed grain, blood, bone, and animal waste.

The maximum size of the particles is between 0.5 and 10 mm.

Comprising placing the pesticidal particulate composition according to claim 1 adjacent to or below the surface of soil.

Comprising mixing water with a hydrophilic phase to form a deformable dough; spraying the lipophilic phase onto the hydrophilic phase and mixing; forming the mixture into granules; drying the granules to mechanical integrity; the hydrophilic material comprises fibers and the particles are formed by extrusion.

The invention has the beneficial effects that: can maintain its morphology in the soil for a period of 1-3 years, including many wet/dry cycles. The discontinuous dispersed lipophilic phase enhances the containment of the oil soluble pesticide, as the primary barrier to release would be expected to be the hydrophilic matrix.

Detailed Description

The discontinuous dispersed lipophilic phase enhances the containment of the oil soluble pesticide, as the primary barrier to release would be expected to be the hydrophilic matrix. In areas of thick vegetation, the particles may be applied to the vegetation thatch near the soil surface. The pesticide compositions of the present invention comprise a discontinuous lipophilic phase, which typically contains a pesticide dissolved therein. The lipophilic phase accelerates the rate of water loss from the matrix phase under the drying time test, as will be described. During the drying time, water was added to the hydrophilic matrix phase to obtain a 200 unit matrix phase at 60% moisture (i.e. water containing 120 units). Under stirring, 10 lipophilic substances at 70 ℃ are sprayed onto the matrix phase and the mixture is then mixed (extruded or compacted). If desired, starch powder may be added to ensure that the granules retain the minimum amount required for their physical integrity. The pellets were placed in an oven at 70 ℃ and the particles were indicated to be dried for 60% to 10% of the time. Suitable lipophilic materials are those in which the drying time (compared to the case of addition of non-lipophilic substances) is reduced by 20% or more. The use of lipophilic materials which accelerate the rate of water loss from the water-swollen hydrophilic matrix phase can lead to enhanced containment of the oil-soluble pesticide. The compositions of the present invention comprise a continuous hydrophilic matrix phase comprised of a hydrophilic material and water. The hydrophilic material is typically a particulate solid. Preferably, the particulate entities comprise eccentric particles having a ratio of largest dimension to smallest dimension of at least 2, more preferably at least 5. More preferably, the hydrophilic entities comprise fibers or fiber segments having a length of 0.05 mm or more, most preferably 0.5 mm or more. The continuous hydrophilic phase contains water. Water may be present in an amount of at least 0.5% by weight of the hydrophilic phase, and preferably in an amount of at least 5% by weight of the hydrophilic phase. The preferred upper limit for water is generally governed by the desired mechanical integrity of the composition. Usually not exceeding 30% by weight. The hydrophilic matrix phase forms a deformable dough under high pressure shear forces when expanded with water. The hydrophilic matrix is edible with respect to the target pest. The hydrophilic matrix may comprise a wide range of organic materials, although decomposed plant materials and plant fibres are particularly preferred. The hydrophilic substrate may comprise edible materials such as stabilized compost material, plant fibers, plant hulls, raw or processed grains, blood and bone, bone meal, peat, animal manure, and mixtures thereof. The hydrophilic substrate comprises peat or corn fiber, preferably wood peat or sedge peat or sphagnum peat. More preferred is the fiber reed sedge peat. Most preferably, the hydrophilic substrate comprises fibrous peat.