JP5031501B2 - 水中への溶出性が改善された農薬粒剤 - Google Patents
水中への溶出性が改善された農薬粒剤 Download PDFInfo
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- JP5031501B2 JP5031501B2 JP2007249196A JP2007249196A JP5031501B2 JP 5031501 B2 JP5031501 B2 JP 5031501B2 JP 2007249196 A JP2007249196 A JP 2007249196A JP 2007249196 A JP2007249196 A JP 2007249196A JP 5031501 B2 JP5031501 B2 JP 5031501B2
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- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 1
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- 239000002736 nonionic surfactant Substances 0.000 description 1
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- 125000001741 organic sulfur group Chemical group 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- JZPKLLLUDLHCEL-UHFFFAOYSA-N pentoxazone Chemical compound O=C1C(=C(C)C)OC(=O)N1C1=CC(OC2CCCC2)=C(Cl)C=C1F JZPKLLLUDLHCEL-UHFFFAOYSA-N 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
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- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000004302 potassium sorbate Substances 0.000 description 1
- 235000010241 potassium sorbate Nutrition 0.000 description 1
- 229940069338 potassium sorbate Drugs 0.000 description 1
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- 229940082509 xanthan gum Drugs 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
Description
、クレー、ベントナイト、タルク、炭酸カルシウム、炭酸ナトリウム、ジークライト、セリサイト、酸性白土、珪石、珪藻土、軽石、ゼオライト、バーミキュライト、ホワイトカーボン、パーライト、アタパルジャイトなどの無機担体;オクテニルコハク酸デンプンエステル、グルコース、マルトース、シュークロース、ラクトースなどの有機担体を挙げることができる。これらの担体はそれぞれ単独でまたは2種以上組み合わせて使用することができる。これらの担体(e)の含有量は、特に制限されないが、農薬粒剤の重量を基準にして、一般に0.1〜90重量%であり、好ましくは1〜70重量%とすることができる。
ピラクロニル原体2.19重量%、ベンゾビシクロン原体2.21重量%、ベンゾフェナップ原体8.64重量%、ポリオキシアルキレンアリルフェニルエーテルサルフェートアンモニウム塩・アルキルベンゼンスルホン酸金属塩配合品5.0重量%、カルボキシメチルセルロース8.0重量%、オクテニルコハク酸デンプンエステル15.0重量%、トリポリリン酸ナトリウム10.0重量%、コルク3.0重量%および炭酸カルシウム45.96重量%を混合容器に秤り込み、万能混合機で5分間混合し、この混合物100質量%に対して水13重量%を添加した後、さらに5分間混練する。この混練物を1.2mm径のスクリーンを付けたバスケット型造粒機(畑鉄工所株式会社製)で造粒し、整粒後の粒を乾燥し、得られた粒を篩い分け(2.38〜0.21mm)して農薬粒剤を得る。
ピラクロニル原体1.95重量%、クミルロン原体15.5重量%、ドデシルベンゼンスルホン酸ナトリウム1.3重量%、プロピレングリコールモノフェニルエーテル4.0重量%、トリポリリン酸ナトリウム2.0重量%、コルク2.0重量%、ベントナイト30.0重量%および炭酸カルシウム43.25重量%を混合容器に秤り込み、万能混合機で5分間混合し、この混合物100質量%に対して水12重量%を添加した後、さらに5分間混練する。この混練物を1.2mm径のスクリーンを付けたバスケット型造粒機(畑鉄工所株式会社製)で造粒し、整粒後の粒を乾燥し、得られた粒を篩い分け(2.38〜0.21mm)して農薬粒剤を得る。
ピラクロニル原体2.19重量%、ベンゾビシクロン原体2.21重量%、ベンゾフェナップ原体8.64重量%、ポリオキシアルキレンアリルフェニルエーテルサルフェートアンモニウム塩・アルキルベンゼンスルホン酸金属塩配合品5.0重量%、カルボキシメチルセルロース8.0重量%、オクテニルコハク酸デンプンエステル15.0重量%、トリポリリン酸ナトリウム10.0重量%および炭酸カルシウム48.96重量%を混合容器に秤り込み、万能混合機で5分間混合し、この混合物100質量%に対して水13.0重量%を添加した後、さらに5分間混練する。この混練物を1.2mm径のスクリーンを付けたバスケット型造粒機(畑鉄工所株式会社製)で造粒し、整粒後の粒を乾燥し、得られた粒を篩い分け(2.38〜0.21mm)して農薬粒剤を得る。
ピラクロニル原体1.95重量%、クミルロン原体15.5重量%、ドデシルベンゼンスルホン酸ナトリウム1.3重量%、プロピレングリコールモノフェニルエーテル4.0重量%、トリポリリン酸ナトリウム2.0重量%、ベントナイト30.0重量%および炭酸カルシウム45.25重量%を混合容器に秤り込み、万能混合機で5分間混合し、この混合物100質量%に対して水12重量%を添加した後、さらに5分間混練する。この混練物を1.2mm径のスクリーンを付けたバスケット型造粒機(畑鉄工所株式会社製)で造粒し、整粒後の粒を乾燥し、得られた粒を篩い分け(2.38〜0.21mm)して農薬粒剤を得る。
500mlビーカーに20℃の3度硬水250mlを入れ、上記で調製した各農薬粒剤20mgを添加する。0.5時間、2時間および24時間後にビーカーの中央から1ml採水する。また、24時間後に採水したのち、ビーカーごと超音波で農薬活性成分を十分に分散させ1ml採水する。これらの採取試料中の農薬活性成分濃度を液体クロマトグラフィーで測定し、下記の式(1)を用いて水中溶出率を算出した。その結果を表1に示す。
水中溶出率(%)=(Ct/Cx)×100・・・・・・・(1)
式中、
Ctは散布0.5時間、2時間および24時間後の農薬活性成分濃度であり、
Cxはビーカーごと超音波で十分に分散させたときの農薬活性成分濃度である。
1/2000アールのポットに水田土壌を充填し、適量の水と化学肥料を加えて混練し、澄水後、ウリカワの塊茎3個およびホタルイの種子適量を植え、2.0葉期のイネ2株を移植した。ポットを水深5cmの湛水状態を保ち、平均気温25℃のガラス室に置いた。その後、ホタルイが出芽始めた時、実施例または比較例の各農薬粒剤を10アール当たり所定の薬量となるようにポットに処理した。処理3週間後に、雑草の除草効果およびイネに対する薬害を調査した。除草効果の評価は、無処理区の状態と生育阻害率(%)により、以下の6段階で示す。
0:0%〜20%未満、
1:20%以上〜40%未満、
2:40%以上〜60%未満、
3:60%以上〜80%未満、
4:80%以上〜100%未満、
5:100%
0:正常発育、
1:僅少害、
2:小害、
3:中害、
4:大害、
5:完全枯死
Claims (5)
- (a)20℃における水溶解度が5ppm以下である農薬活性成分、(b)見かけ比重が0.02〜0.20で、粒度が100〜2000μmで且つ2時間後の浮水率が70%以上である水面浮遊性担体、(c)トリポリリン酸塩、(d)アルキルベンゼンスルホン酸塩および(e)他の担体を含有することを特徴とする水中への溶出性が改善された農薬粒剤。
- 農薬活性成分(a)がベンゾフェナップ、ベンゾビシクロンおよびクミルロンより選ばれる少なくとも1種であり、その含有量が農薬粒剤の重量を基準にして0.1〜80重量%である請求項1に記載の農薬粒剤。
- 水面浮遊性担体(b)が発泡シラス、焼成バーミキュライト、発泡パーライトおよびコルクより選ばれる少なくとも1種であり、その含有量が農薬粒剤の重量を基準にして0.1〜8重量%である請求項1または2に記載の農薬粒剤。
- 平均粒径が0.5mm〜3mmである請求項1〜3のいずれかに記載の農薬粒剤。
- 水田に施用される請求項1〜4のいずれかに記載の農薬粒剤。
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