CN1478399A - Granular agent containing chlorpysifos and its preparation method - Google Patents

Abstract

A granular chemical for killing underground pests contains chlorpyrifos, one or more of acidic argil, attapulgite, diatomite, Kaolinite, bentone, talc and starch, and one or more of wood dust, powdered strew or stalk, rice husk and white carbon black, and is rpepared through proportional mixing, granulating and baking.

Description

A kind of granule that contains chlopyrifos and preparation method thereof

Technical field

To the present invention relates to a kind of effective ingredient be chlopyrifos, be mainly used in the preparation method of the pesticidal preparations granule of control soil insect.

Background technology

Chlopyrifos (English name chlorpyrifos), chemical name O, O-diethyl-O (3,5, the 6-trichloro-2-pyridyl) phosphorothionate, have another name called Le Siben (The Dow Agrosciences, LLC.'s trade name), pacify the people happy, gram is happy waits indefinitely, and is U.S. DOW chemical company in nineteen sixty-five development product at first, is a kind of efficient, wide spectrum, organic phosphor desinsection miticide that toxicity is low.Used proof in more than 20 year, working concentration does not increase, and insect does not have pesticide resistance substantially to it.Chlopyrifos mainly by tag, stomach toxicity and stifling 3 kinds of mode of action Pest Control.Insecticidal spectrum can be compared with acephatemet, but toxicity is more much lower than acephatemet, belongs to moderate toxicity, belongs to low toxicity in organophosphorus insecticide.Can be widely used in numerous areas such as paddy rice, wheat, cotton, vegetables, fruit tree, tea tree, health, all effective to insects such as the control snout moth's larva of rice, leaf-roller, plant hopper, cotton tetranychid, aphid, cabbage caterpillar, diamond-back moth, the wild snout moth's larva of beans, two spotted spider mite, tea geometrid, wriggler, cockroaches, the application that at home and abroad relates to is extensive, is to substitute the comparatively ideal large-tonnage kind of high-toxic pesticide.Its structural formula is: R is methyl or ethyl

R is that ethyl then is called ethyl chlopyrifos (being called for short chlopyrifos), and R is that methyl is called chlorpyrifos-methyl, and widely used in China is the ethyl chlopyrifos.

Chlopyrifos is applied to agricultural and non-agricultural with the form of missible oil or aqueous emulsion usually, but because its cream preparation commonly used in use, drug is fast, drift when adding spraying, often can only bring into play 60～70% drug effect, can not well utilize, in order to overcome these deficiencies, people are innovated the preparation of chlopyrifos one after another, large quantities of poison with poison composite doses appearred, all be to improve infiltration, effects such as absorption, thereby the minimizing consumption reaches and makes full use of, improve the purpose of drug effect, exist single agent of multiple chlopyrifos or complex preparation in the market, as application number is that 01100515 application for a patent for invention discloses the composite of Imidacloprid and chlopyrifos, and wooly aphis is had special preventive effect; Application number is that 01100511 application for a patent for invention discloses the composite of Avermectin and chlopyrifos, and pear sucker is had special preventive effect; Application number is that 00128287 application for a patent for invention discloses the composite of Hostathion and chlopyrifos, is mainly used in the control snout moth's larva of rice; Application number is that 98111820 application for a patent for invention discloses the composite to improve drug effect of chrysanthemum ester insecticide and chlopyrifos; Application number is the composite missible oil that forms that 98122085 application for a patent for invention discloses 5a,6,9,9a-hexahydro-6,9-methano-2,4 and chlopyrifos, and main purpose is to improve lasting effect; Application number is the composite missible oil that forms that 98122084 application for a patent for invention discloses dichlorvos and chlopyrifos, and main purpose is synergy; Application number is that 93120345 application for a patent for invention discloses the composite of parathion-methyl and phoxim and chlopyrifos, is mainly used in preventing and kill off of cotton bollworm.

And spreading fertilizer over the fields conveniently of granule almost do not have the drift phenomenon, therefore, now be widely used in more and more on each field, granule can slowly be controlled medicine and discharge, and therefore can also use with optimal dose accurately, and reach the purpose of long-term control, and this is desirable.

Discharge too quickly in order to suppress agricultural chemicals, people make granule with many agricultural chemicals, as furans pellet, desinsection list.But mostly granule is made carrier with the material of high-bulk-densities such as rubble, fine sand, and this method manufacturing cost is not high, but its shortcoming be particle than great, specific surface area is little, and is little with the controlling object contact-making surface, spreads fertilizer over the fields inhomogeneously, adsorptivity is poor.Past also once advised using paraffin when the preparation granule, but the shortcoming of this method is big with the surface tension of water, and active component can not fully be released, and adding needs to be difficult for evenly mixing with the paraffin fusion and with it and other component, therefore, the method complexity for preparing these granules.

Having the purpose of this invention is to provide a kind of is the granule and preparation method thereof of active constituent with the chlopyrifos, is mainly used in the control soil insect.

Summary of the invention

The present invention is active ingredient with the chlopyrifos, and it is dispersed in one or more carrier and the adsorbent, by the extruding granulator granulation, dry back.

Described carrier is one or more the mixing in Emathlite, attapulgite, diatomite, kaolin, bentonite, talcum, the starch.Its consumption accounts for the 50-80% of gross weight.

Described adsorbent is one or more the mixing in wood chip, straw powder, rice spermoderm, the white carbon, is preferably straw powder, rice spermoderm.Its consumption accounts for the 5-40% of gross weight.

The used active ingredient of the present invention is a chlopyrifos, can for content at the former medicine more than 85%, also can for directly from production process, obtain without purifying and also containing organic solvent semi-finished product (being called oily benzene) such as toluene, wherein contain the chlopyrifos of 15-84%.When adopting the former medicine of high-load, because chlopyrifos at room temperature is a solid, mix in order to make it, still needing is fused into liquid state with it and adopts the mechanical agitation mode to mix with carrier and adsorbent again.If adopt the oily benzene of low content to prepare,, then needn't melt owing to be liquid.Said preparation mainly is applied in the soil, is used for preventing and kill off of soil insect, being uniformly dispersed when lower content helps using, so the content of the preferred active ingredient chlopyrifos of the present invention is 1-20%.

The preparation method of granule of the present invention: material and carrier, adsorbent and water that (1) will contain chlopyrifos mix, and obtain wet feed I; (2) I is passed through the extruding granulator granulation, get shot-like particle II; (3) with the II drying.

Granulation for convenience, the content that should control the component that volatilizees among the wet feed I (be mainly bring in water, the former medicine toluene etc.) is 1-20%, is preferably 5-8%.

After the oven dry, can randomly adjust the particle size of granule, choose the scope that particle diameter is 0.2-3mm through screening, the particle diameter oversized particles can concentrate the back to pulverize after sieve, and remaining powder can return granulating system.Can certainly be by adjusting the product that comminutor reaches other particle size range.

Granule of the present invention has many advantages: (1) preparation is simple, convenient; (2) can control the slow release of active ingredient; (3) bulk density is little, and is littler about one times than the bulk density of general granule; (4) specific surface area increases, and helps evenly spreading fertilizer over the fields, and can effectively bring into play the effect of its active component, reduces consumption; (5) adopt the environment-friendly type adsorbent, environmentally safe, and can make fertilizer after decomposing and use, compare with existing granule, granule of the present invention is more suitable for the control in soil insect, and is applied to mosquitos and flies breeding site such as cloaca, paddy field, weeds clump, the multiplying of control mosquitos and flies larva etc.

Embodiment

Existing specific embodiment is described the present invention, and the prescription that embodiment adopted just can be realized a part of the present invention, can not be interpreted as limitation of the present invention.

Embodiment 1: get the former medicine 10.526kg of 95% chlopyrifos; attapulgite 60kg; rice spermoderm 29.474kg; water 10kg with the former medicine heat fused of chlopyrifos, adds attapulgite, rice spermoderm, water; mix; change extruding granulator again over to and carry out granulation, at last the oven dry, sieve 10% chlopyrifos granule.

Embodiment 2: get the oily benzene 6.25kg that contains chlopyrifos 80%, and Emathlite 30kg, kaolin 40kg, straw powder 25kg, water 5kg, embodiment gets 5% chlopyrifos granule with embodiment 1.

Embodiment 3: get the former medicine 21.05kg of 95% chlopyrifos, and diatomite 30kg, bentonite 30kg, wood chip 18.95kg, water 10kg, embodiment gets 20% chlopyrifos granule with embodiment 1.

Embodiment 4: the 10% chlopyrifos granule that adopts embodiment 1 to make, be used to prevent and treat sugarcane sugarcane tortoise and fragrant-flowered garlic maggot in Guangdong and Shandong respectively, and be better than the missible oil of identical effective ingredient for the soil insect drug effect, the field control effectiveness test result is as follows:

10% chlopyrifos granule control sugarcane sugarcane tortoise field control effectiveness test

Handle	Repeat	Behind the medicine 30 days
						Total seedling number	Withered heart seedling number	Withered heart rate (%)	Preventive effect (%)
		10% chlopyrifos granule, 800 gram/mus	????1	????348	????9					????2.59	????77.04
????2	????344					????8	????2.33	????80.04
			????3	????272	????7				????2.57	????77.22
????4	????420					????12	????2.86	????74.65
			On average	????-	????-				?????-	????77.24
10% chlopyrifos granule, 1200 gram/mus	????1					????336	????8	????2.38			????76.77
		????2	????352	????6	????1.70				????85.37
	????3					????441	????4	????0.91		????93.49
		????4	????387	????5	????1.29				????88.55
	On average					????-	????-	?????-		????86.05
		10% chlopyrifos granule, 1500 gram/mus	????1	????372	????4				????1.08		????89.51
????2	????396					????7	????1.77	????84.83
			????3	????388	????6				????1.55	????88.91
????4	????376					????5	????1.33	????88.21
			On average	????-	????-				?????-	????87.86
40% chlorpyrifos ec 400ml/ mu	????1					????320	????6	????1.88			????83.33
		????2	????308	????7	????2.27				????79.88
	????3					????418	????9	????2.15		????80.94
		????4	????380	????8	????2.11				????81.29
	On average					????-	????-	?????-		????81.36
		40% chlorpyrifos ec 500ml/ mu	????1	????369	????8				????2.17		????78.85
????2	????347					????4	????1.15	????90.11
			????3	????382	????3				????0.79	????94.37
????4	????396					????6	????1.52	????86.57
			Add up to	?????-	????-				??????-	????87.47
????CK	????1					????361	????37	????10.25			??????-
		????2	????412	????48	????11.65				??????-
	????3					????373	????52	????13.94		??????-
		????4	????390	????44	????11.28				??????-

The test of 10% chlopyrifos granule control fragrant-flowered garlic maggot seedling protecting effect

(mu consumption) handled in test	Repeat	Investigation fragrant-flowered garlic seedling number	The killed seedling number of leek					Rate of damage (%)	The preventive effect of keeping a full stand of seedings (%)
										The 1st time	The 2nd time	The 3rd time	The 4th	Add up to
			10% chlopyrifos granule, 800 grams	????1	????129	????4	????2								????3	????3	??12	??9.30	????88.41
????2	????141	????4						????1	????3	????4	??12	??8.51	????89.03
				????3	????129	????5	????1							????2	????5	??13	??10.08	????86.53
????4	????135	????2						????2	????3	????3	??10	??7.41	????90.48
				Add up to	????534	????15	????6							????11	????15	??47	??8.80	????88.67
10% chlopyrifos granule, 1200 grams	????1	????126						????1	????0	????0	????0	??1	??0.79						????99.20
			????2	????151	????1	????0	????1							????2	??4	??2.65	????96.58
	????3	????130						????1	????0	????0	????0	??1	??0.77					????98.97
			????4	????133	????1	????0	????1							????1	??3	??2.26	????97.10
	Add up to	????540						????4	????0	????2	????3	??9	??1.67					????97.85
			10% chlopyrifos granule, 1500 grams	????1	????145	????1	????0							????0	????0	??1	??0.69		????99.14
????2	????136	????0						????0	????0	????0	??0	??0	????100
				????3	????147	????1	????0							????1	????1	??3	??2.04	????97.27
????4	????141	????0						????0	????0	????1	??1	??0.71	????99.09
				Add up to	????569	????2	????0							????1	????2	??5	??0.88	????98.87
40% happy this this 300ml	????1	????129						????3	????1	????1	????4	??9	??6.98						????91.01
			????2	????138	????3	????2	????2							????3	??10	??7.25	????90.67
	????3	????125						????2	????1	????3	????2	??8	??6.40					????91.76
			????4	????140	????3	????2	????2							????4	??11	??7.86	????89.88
	Add up to	????531						????11	????6	????8	????13	??38	??7.16					????90.83
			????CK	????1	????147	????11	????20							????59	????28	??118	??80.27
????2	????147	????10						????19	????58	????27	??114	??77.55	?????-
				????3	????139	????9	????15							????56	????24	??104	??74.82	?????-
????4	????149	????10						????17	????61	????28	??116	??77.85	?????-
				Add up to	????582	????40	????71							????234	????107	??452	??77.66	?????-

Claims (11)

1. granule that is used to prevent and treat soil insect is characterized in that being made up of following component:

A active constituent chlopyrifos;

The B carrier

The C adsorbent

2. according to the described granule of claim 1, the weight content of active constituent chlopyrifos is 1-20%.

3. carrier according to claim 1 is one or more the mixing in Emathlite, attapulgite, diatomite, kaolin, bentonite, talcum, calcium carbonate, the starch, accounts for the 50-80% of gross weight.

4. adsorbent according to claim 1 is one or more the mixing in wood chip, straw powder, rice spermoderm, the white carbon, accounts for the 5-40% of gross weight.

5. granule according to claim 1 can also be applied to places such as cloaca, paddy field, weeds clump, control mosquitos and flies larva and ant.

6. preparation method who is used to prevent and treat the granule of soil insect is characterized in that:

(1) material and carrier, adsorbent and the water that will contain chlopyrifos mixes, wet feed I;

(2) I that obtains in the step (1) is passed through the extruding granulator granulation, get shot-like particle II;

(3) with the II drying.

7. according to the method for claim 6, the described material that contains chlopyrifos be content at the former medicine of the chlopyrifos more than 85%, or the mixture that contains chlopyrifos that directly from production process, separates.

8. according to the method for claim 7, described mixture death by poisoning tick content is 15-84%.

9. according to the method for claim 6, described carrier is one or more the mixing in Emathlite, attapulgite, diatomite, kaolin, bentonite, talcum, the starch.

10. according to the method for claim 6, described adsorbent is one or more the mixing in wood chip, straw powder, rice spermoderm, the white carbon.

11. according to the method for claim 6, the average grain diameter of shot-like particle II is 0.2-3mm.