Method for controlling arthropod pests

Abstract

A method for controlling arthropod pests includes the following steps: A) a step of forming furrows in the soil; B) a step of sowing seeds of a crop in the furrows; C) a step of applying clothianidin and an inorganic phosphate to the furrows; and D) a step of covering the furrows by gathering soil into the furrows.

Claims

1. A method for controlling arthropod pests, the method comprising the following steps: A) a step of forming furrows in the soil; B) a step of sowing seeds of a crop in the furrows; C) a step of applying clothianidin and an inorganic phosphate to the furrows; and D) a step of covering the furrows by gathering soil into the furrows.

2. The method for controlling arthropod pests according to claim 1, wherein the step C) is a step of applying a mixed composition containing clothianidin and an inorganic phosphate to the furrows.

3. The method for controlling arthropod pests according to claim 1, wherein the inorganic phosphate is an ammonium phosphate.

4. The method for controlling arthropod pests according to claim 1, wherein the amount of application of clothianidin is 10 to 500 g per hectare.

5. The method for controlling arthropod pests according to claim 1, wherein the amount of application of the inorganic phosphate is 10 to 60 kg per hectare.

Description

EXAMPLES

(1) Next, Formulation Examples and Test Examples related to the present invention will be described; however, the present invention is not intended to be limited to these Examples. Meanwhile, in the following Examples, the unit parts represent parts by weight, unless particularly stated otherwise.

(2) <Production Example for Preparation Containing Clothianidin>

Reference Example 1 (Clothianidin Granules)

(3) 0.5 parts of clothianidin, 1 part of synthetic hydrated silicon oxide, 2 parts of calcium lignin sulfonate, 30 parts of bentonite, and 66.5 parts of kaolin clay are thoroughly pulverized and mixed, and water is added thereto. The mixture is thoroughly kneaded and then is granulated and dried. Thus, granules are obtained.

Reference Example 2 (Clothianidin Wettable Powder)

(4) 20 parts of clothianidin, 3 parts of sodium dodecyl benzene sulfonate, 3 parts of sodium lignin sulfonate, and 70 parts of diatomaceous earth are pulverized with a jet air mill, and thus a wettable powder is obtained.

(5) <Production Example for Preparation Containing Clothianidin and Inorganic Phosphate>

Reference Example 3 (Mixed Wettable Powder of Clothianidin and Diammonium Hydrogen Phosphate)

(6) 0.5 parts of clothianidin, 40 parts of a diammonium hydrogen phosphate powder, 3 parts of sodium dodecyl benzene sulfonate, 3 parts of sodium lignin sulfonate, and 53.5 parts of diatomaceous earth are pulverized with a jet air mill, and thus a wettable powder is obtained.

(7) <Production Example for Preparation Containing Inorganic Phosphate>

Reference Example 4 (Ammonium Dihydrogen Phosphate Granules)

(8) 100 parts of a mixture including 60 parts of an ammonium dihydrogen phosphate powder, 2 parts of calcium lignin sulfonate, 30 parts of bentonite, and kaolin clay for the balance is thoroughly pulverized and mixed, and water is added thereto. The mixture is thoroughly kneaded, and then is granulated and dried. Thus, granules are obtained.

Test Example 1

(9) Preparation of Mixed Liquid

(10) An aqueous solution containing 0.004% of clothianidin and 5% of diammonium hydrogen phosphate (hereinafter, described as present preparation liquid) was produced using a clothianidin water dispersible granule (used a 16% water dispersibie granule, trade name: DANTOTSU water soluble powder, manufactured by Sumitomo Chemical Co., Ltd.) and diammonium hydrogen phosphate (manufactured by Sigma-Aldrich Company).

(11) Method of Using Mixed Liquid

(12) 1. A container having a diameter of 12 cm was filled with soil, and furrows were produced to a depth of 4 cm from the soil surface. 10 ml of the present preparation liquid was sprayed into the furrows, and one grain of corn seed (variety name: Mas53B) was sowed in each furrow. The furrows were covered by gathering soil from a side of each furrow. Corn was grown in a greenhouse. Fourteen days after sowing of the corn seeds, ten 3-instar larvae of Mythimna separata were released per stem of corn. This is referred to as a seeding furrow treatment section.

(13) 2. Similarly to the seeding furrow treatment section, a container was filled with soil, and 10 ml of the present preparation liquid was sprayed over the entire surface of the soil and was mixed with the entire soil. Subsequently, furrows were produced to a depth of 4 cm from the soil surface, and one grain of corn seed (variety name: Mas53B) was sowed in each furrow. The furrows were covered by gathering soil from a side of each furrow. Corn was grown in a greenhouse. Fourteen days after sowing of the corn seeds, ten 3-instar larvae of Mythimna separata were released per stem of corn. This is referred to as a soil incorporation treatment section.

(14) 3. Similarly to the seeding furrow treatment, a container was filled with soil, and furrows were produced to a depth of 4 cm from the soil surface. One grain of corn seed (variety name: Mas53B) was sowed in each furrow, and the furrows were covered by gathering soil from a side of each furrow. 10 ml of the present preparation liquid was sprayed over the entire soil surface in the container. Fourteen days after sowing of the corn seeds, ten 3-instar larvae of Mythimna separata were released per stem of corn. This is referred to as a soil surface drenching treatment section.

(15) 4. Similarly to the seeding furrow treatment, a container was filled with soil, and furrows were produced to a depth of 4 cm from the soil surface. One grain of corn seed (variety name: Mas53B) was sowed in each furrow, and the furrows were covered by gathering soil from a side of each furrow. Fourteen days after sowing of the corn seeds, ten 3-instar larvae of Mythimna separata were released per stem of corn. This is referred to as a chemically untreated section.

(16) For each of the treated sections of 1, to 4, the numbers of healthy insects, moribund insects and dead insects of released Mythimna separata were investigated two days after the insect release, and the rate of dead or moribund insects was calculated using the following expression. For each of the treated sectiones, the average rate of dead or moribund insects of five tests is indicated in Table 1.
Rate of dead or moribund insects=100(10A)/10

(17) A: Number of healthy insects at the time of investigation

(18) TABLE-US-00001 TABLE 1 Amount of Rate of treating dead or Treating chemical moribund chemical (mg/pot) insects Chemically 4% untreated section seeding furrow Clothianidin 0.4 82% treatment section Diammonium 500 hydrogen phosphate soil incorporation Clothianidin 0.4 42% treatment section Diammonium 500 hydrogen phosphate Soil surface Clothianidin 0.4 12% drenching treatment Diammonium 500 section hydrogen phosphate

(19) As a result, the seeding furrow treatment section exhibited a high rate of dead or moribund insects, compared to the chemically untreated section, the soli incorporation treatment section, and the soil surface drenching treatment section.

Test Example 2

(20) Production of Mixed Liquid

(21) An aqueous solution containing 0.004% of clothianidin and 5% of diammonium hydrogen phosphate was produced using a clothianidin water dispersibie granule (used a 16% water dispersibie granule, trade name: DANTOTSU water soluble powder, manufactured by Sumitomo Chemical Co., Ltd.) and diammonium hydrogen phosphate (manufactured by Sigma-Aldrich Company).

(22) An aqueous solution containing 0.004% of clothianidin and 5% of ammonium chloride was produced using a clothianidin water dispersible granule (used a 16% water dispersible granule, trade name: DANTOTSU water soluble powder, manufactured by Sumitomo Chemical Co., Ltd.) and ammonium chloride (manufactured by Wako Pure Chemical Industries, Ltd.).

(23) Method for Applying Mixed Liquid

(24) 1. A container having a diameter of 12 cm was filled with soil, and furrows were produced to a depth of 4 cm from the soil surface. 10 ml of the mixed liquid of clothianidin and diammonium hydrogen phosphate thus produced was sprayed into the furrows, and one grain of corn seed (variety name: Mas53B) was sowed in each furrow. The furrows were covered by gathering soil from a side of each furrow. Corn was grown in a greenhouse. Thirteen days after sowing of the corn seeds, seven 5-instar larvae of Mythimna separata were released per stem of corn. This is referred to as an ammonium phosphate treated section.

(25) 2. A container having a diameter of 12 cm was filled with soil, and furrows were produced to a depth of 4 cm from the soil surface. 10 ml of the mixed liquid of clothianidin and ammonium chloride thus produced was sprayed into the furrows, and one grain of corn seed (variety name: Mas53B) was sowed in each furrow. The furrows were covered by gathering soil from a side of each furrow. Corn was grown in a greenhouse. Thirteen days after sowing of the corn seeds, seven 5-instar larvae of Mythimna separata were released per stem of corn. This is referred to as an ammonium chloride treated section.

(26) 3. A container having a diameter of 12 cm was filled with soil, and furrows were produced to a depth of 4 cm from the soil surface. One grain of corn seed (variety name: Mas53B) was sowed in each furrow, and the furrows were covered by gathering soil from a side of each furrow. Corn was grown in a greenhouse. Thirteen days after sowing of the corn seeds, seven 5-instar larvae of Mythimna separata were released per stem of corn. This is referred to as a chemically untreated section.

(27) The numbers of healthy insects, moribund insects and dead insects of released Mythimna separata were investigated one day after the insect release, and the rate of dead or moribund insects was calculated using the following expression. For each of the treated sections, the average rate of dead or moribund insects of five tests was determined. The results are presented in Table 2.
Rate of dead or moribund insects=100(7A)/7

(28) A: Number of healthy insects at the time of investigation

(29) TABLE-US-00002 TABLE 2 Amount of Rate of treating dead or Treating chemical moribund chemical (mg/pot) insects Chemically 0% untreated section Ammonium phosphate Clothianidin 1.2 83% treated section Diammonium 500 hydrogen phosphate Ammonium chloride Clothianidin 1.2 49% treated section Ammonium 500 chloride

(30) As a result, the ammonium phosphate treated section exhibited a high rate of dead or moribund insects, compared to the ammonium chloride treated section.

INDUSTRIAL APPLICABILITY

(31) An excellent controlling effect against arthropod pests can be obtained by the present invention.