CN101385461B - Compound pesticide for preventing and treating ricestem borer, rice leaf roller - Google Patents

Abstract

The invention provides a combined pesticide for preventing and controlling rice stem borer and rice leaf roller, which is mainly made from abamectin, profenofos, an emulsifying agent, solvent and a penetrating agent. Various ingredients are mixed evenly in preparation. The two compounds of abamectin and profenofos of the invention have obvious synergistic action after being combined. The combined pesticide of the invention can prevent and control rice stem borer, rice leaf roller and other pests to rice and can delay the resistance of pest against the individual ingredient in the prescription; therefore, the invention has a comparatively good action on increasing the rice production.

Description

A kind of compounded pesticides of preventing and treating rice-stem borer, rice leaf roller

Technical field

The present invention relates to a kind of agricultural chemicals, what relate in particular to is in case the agricultural chemicals of the chilo suppressalis of harnessing the river, paddy rice rice leaf roller.

Background technology

It is a kind of cause harm insect of paddy rice of moth property of boring that striped rice borer (Chilo suppressalis Walker) belongs to the Lepidoptera Pyralidae, and paddy rice all can be injured from the tillering stage to the milk ripe stage, influenced yield and quality.This worm threatens greatly Rice Production, popular time underproduction 30-60%, even total crop failure.Harm in recent years is heavier, is ascendant trend year by year.For a long time, domestic always organic phosphates such as acephatemet, dimehypo and sandworm toxin insecticide first-selected medicament as the control striped rice borer.But the lasting period of organophosphorus insecticideses such as acephatemet is short, toxicity is high, the residual hazard phase is long, and is big to killing and wounding of aquatic animal and natural enemy, dangerous to people and animals, and country has forbidden producing and using; Lasting period of sandworm toxin insecticides such as dimehypo, desinsection list is short, kills the ovum weak effect, and to the high poison of parasites such as rice borer oophagous trichogrammae, and dimehypo water solution contains the salt of higher concentration, and using dosage is too high, influences paddy growth on the contrary.

Rice leaf roller (Cnaphalocrocis medinalh Guenee) belongs to the Lepidoptera Pyralidae, is the important pests of paddy rice.Rice leaf roller is mainly caused leaf roll by gnawing mesophyll, and rice leaf is bleached, thereby influences the photosynthesis of blade, causes empty flat rate rising, thousand kernel weight to reduce, and influences rice yield.The rice yield loss maximum that particularly causes harm heading stage and cause.Because rice leaf roller is a kind of migratory pest, in the production mainly based on chemical control, institute's with medicament is the medicament of organophosphorus insecticideses such as Hostathion, orthene and desinsection list, dimehypo and so on neires toxin mostly, produced very strong pesticide resistance in the pest body, control efficiency is very undesirable always.It is reported that Zhejiang Province rice leaf roller in 1999 reaches 67-587 doubly to the resistance of dimehypo, Sichuan Province rice leaf roller in 2000 reaches 286 times to the resistance of dimehypo, has reached high anti-and high anti-level.

Along with a large amount of uses of agricultural chemicals in recent years, the pesticide resistance of striped rice borer, rice leaf roller strengthens greatly, the good medicament of effect in the past, and control efficiency reduces now.Therefore take place according to rice insect pest with the situation of preventing and treating, need development efficient, wide spectrum, low toxicity, safety, delaying drug resistance, the operating period is long and to striped rice borer, the effective novel pesticide of rice leaf roller.

Summary of the invention

The objective of the invention is at the problems referred to above, provide a kind of and can prevent and treat striped rice borer, can prevent and treat the compounded pesticides of rice leaf roller again.

Compounded pesticides of the present invention contains drug component, emulsifier, solvent, bleeding agent, and the parts by weight proportioning of described each component is:

Drug component 10-55 part

Solvent 10-70 part

Emulsifier 5-20 part

Bleeding agent 1-5 part

Wherein, contain Avermectin and Profenofos in the described drug component, and the parts by weight proportioning of the two is 1: 5-25 part;

Described Avermectin is white or the former medicine of yellow crystal;

Described Profenofos is yellowish chromogen medicine;

Described solvent is any in toluene, dimethylbenzene, acetone, the dimethyl formamide.

Described emulsifier is 0201,500 ^#, 602,2210,700 ^#, any two or three composition in the Tween-80, Tx-10, NP-10, neopelex.

Described bleeding agent be in diesel oil, azone, machine oil, peregal, JFC, the organosilicon any or mix with any ratio and to use.

The formulation of above-mentioned compounded pesticides adds appropriate amount of addition agent and filler etc. and also can be made into suspending agent, pulvis, wetting powder, aqueous emulsion except that missible oil.

The mechanism of action of the present invention is based on Avermectin to be had insect and mite class and tags and stomach poison function.What mechanism of action was different with general insecticide is that it disturbs the neurophysiology activity, stimulate and discharge the r-aminobutyric acid, and the r-aminobutyric acid has inhibitory action to arthropodan nerve conduction, mite class adult, if mite and insect and larva with paralysis symptom promptly appears after medicament contacts, inertia is not got food, and is dead after 2-4 days.Avermectin can not moved by adsorption by soil in soil, and by microbial decomposition, thereby in environment, do not have cumulative function.Profenofos is a broad-spectrum organophosphorous pesticide, and miticide has quick-acting.Permeability is preferably arranged on plant leaf blade.Its mechanism of action is to suppress cholinesterase in the insect bodies.

Two kinds of compounds utilize different effect characteristics after composite, have obvious synergistic effect, can suspension of pesticide resistance generation, the insect that has produced resistance at present also there is effect preferably.

The invention has the advantages that: compounded pesticides of the present invention is to striped rice borer, and other insect on rice leaf roller and the paddy rice all can prevent and treat, and can delay the resistance that insect occurs single agent in the prescription, to promoting that increasing production of rice has better action.

Embodiment

Below in conjunction with embodiment the present invention is described more specifically, but embodiment of the present invention are not limited to these embodiment:

Embodiment one

With Avermectin 20kg, Profenofos 350kg is dissolved among the dimethylbenzene 530kg, 40kg2210, and 50kg 500 ^#, the 10kg azone stirs and promptly gets 37% Avermectin Profenofos missible oil.

Embodiment two

With Avermectin 20kg, Profenofos 200kg, be dissolved among the toluene 100kg, add 40kg emulsifier 700# again, 80kg emulsifier 602, penetrating agent JFC 10kg stir and obtain oil phase, under shear action oil phase are added in the 550kg water, make it to form milky homogeneous liquid, promptly get 22% Avermectin Profenofos aqueous emulsion.

Embodiment three

With Avermectin 20kg, Profenofos 500kg adds neopelex 100kg, and calcium lignosulfonate 40kg, BX draw back powder 20kg, and kaolin 320kg mixes promptly getting 52% Profenofos Avermectin wetting powder of the present invention through comminution by gas stream.

Embodiment four

With Avermectin 50kg, Profenofos 500kg adds neopelex 120kg, 20kg emulsifier 500 ^#, 20kg emulsifier NP-10, anti frozen liquid 40kg, defoamer 10kg, thickener 5kg, water complements to 1000kg, shears 1 hour, promptly gets 55% Avermectin Profenofos suspending agent.

EXPERIMENTAL EXAMPLE one:

The mensuration of Avermectin and Profenofos compounded pesticides co-toxicity coefficient

At indoor measurement compounded pesticides of the present invention to striped rice borer, the co-toxicity coefficient of rice leaf roller.Test method is pressed Abbott formula calculation correction lethality for soaking malicious method, looks into the probit value and the metering logarithm value of corrected mortality.Carrying out toxicity regression with the Casiofx-3900 calculator calculates.Co-toxicity coefficient＞100 prove that promptly this compounded pesticides is synergy.Result of the test sees Table 1, table 2:

Showing that from data Avermectin and Profenofos proportioning are at 1: 17.5 o'clock, is 147.83 to the striped rice borer co-toxicity coefficient, is 146.91 to the rice leaf roller co-toxicity coefficient, and synergistic effect is obvious.

Table 1 pair striped rice borer toxicity test

Reagent agent a: b	Regression equation (Y=)	LC 50(mg/L)	Co-toxicity coefficient
				1∶0 0∶1 1∶5 1∶10 1∶17.5 1∶25	Y＝6.1715+1.7098x Y＝2.1390+1.3732x Y＝4.9243+1.1581x Y＝4.4218+2.2051x Y＝4.2090+1.1581x Y＝4.0091+1.7317x	0.21 121.18 1.16 1.83 2.51 3.73	105.66 122.10 147.83 137.87

A represents Avermectin; B represents Profenofos

Table 2 pair rice leaf roller toxicity test

Reagent agent a: b	Regression equation (Y=)	LC 50(mg/L)	Co-toxicity coefficient
				1∶0 0∶1 1∶5 1∶10 1∶17.5 1∶25	Y＝4.7349+1.4818x Y＝1.4615+1.2768x Y＝3.4094+1.7943x Y＝3.2564+1.6218x Y＝2.7073+1.8195x Y＝2.3959+1.7720x	1.51 590.61 7.70 11.89 18.20 29.49	116.7 136.23 146.91 125.13

A represents avermitilis strain system; B represents Profenofos

EXPERIMENTAL EXAMPLE 2: selecting for use the striped rice borer co-toxicity coefficient is 147.83, to the rice leaf roller co-toxicity coefficient is 146.91 proportioning 1: 17.5, is made into 37% Avermectin Profenofos missible oil (2% Avermectin+35% Profenofos) striped rice borer, rice leaf roller are carried out field control effectiveness test:

1) control striped rice borer: with 37% Avermectin Profenofos missible oil, convert water spray with every mu with preparation 30g, 40g, 50g, each is handled and converts the water yield is 60kg/667m ²Every mu of preventive effect that sprays 37% Avermectin Profenofos missible oil 30g, 40g, 50g is respectively 82.79%, 83.39%, 94.82%.The preventive effect performance significance difference opposite sex with contrast medicament 37% Profenofos missible oil 50g/ mu and 37% abamectin emulsifiable concentrate 50g/ mu.(effect of control striped rice borer sees Table 3).

2) control rice leaf roller: with 37% Avermectin Profenofos missible oil, convert water spray with every mu with preparation 30g, 40g, 50g, each is handled and converts the water yield is 60kg/667m ², every mu of preventive effect that sprays 37% Avermectin Profenofos missible oil 30g, 40g, 50g is respectively 62.9%, 81.27%, 87.6%.The preventive effect performance significance difference opposite sex with contrast medicament 37% Profenofos missible oil 50g/ mu and 37% abamectin emulsifiable concentrate 50g/ mu.(effect of control rice leaf roller sees Table 4).

The field test results of the anti-striped rice borer of harnessing the river of table 3 37% Avermectin Profenofos missible oil

Handle (g/667m 2)	Repeat	Investigate total strain number	Behind the medicine 14 days
						Withered calculation	Withered heart rate (%)	Preventive effect (%)
			37% Avermectin Profenofos missible oil (30g)	1	1400				11	0.79	80.92
2	1400	10				0.71	82.85
				3	1400			9	0.64	84.54
4	1400	10				0.71	82.85
				On average	1400					82.79bB
37% Avermectin Profenofos missible oil (40g)	1	1400				9	0.64				84.54
			2	1400	10			0.71	82.85
	3	1400				7	0.50			87.92
			4	1400	8			0.57	86.23
	On average	1400								83.39bB
			37% Avermectin Profenofos missible oil (50g)	1	1400			5	0.36		91.74
2	1400	3				0.21	94.34
				3	1400			3	0.21	94.75
4	1400	1				0.07	98.44
				On average	1400					94.82aA
37% Profenofos missible oil (50g)	1	1400				10	0.71				83.72
			2	1400	8			0.57	84.64
	3	1400				13	0.93			76.75
			4	1400	5			0.36	92.00
	On average	1400								84.28bB
			37% abamectin emulsifiable concentrate (50g)	1	1400			16	1.14		73.85
2	1400	12				0.86	76.82
				3	1400			21	1.5	62.50
4	1400	14				1.0	77.78
				On average	1400					72.74cC
Clear water contrast CK	1	1400				61	4.36
			2	1400	52			3.71
	3	1400				56	4.00
			4	1400	63			4.50
	On average	1400					4.14

The field test results of table 4 37% Avermectin Profenofos missible oil control rice leaf roller

Handle (g/667m 2)	Repeat	Before the medicine	Behind the medicine 7 days		Behind the medicine 14 days
							Leaf roll rate (%)	Leaf roll rate (%)	Preventive effect (%)	Leaf roll rate (%)	Preventive effect (%)
		37% Avermectin Profenofos missible oil (30g)	1	5.52	2.75							2.18
2	6.78						1.77		1.04
			3	5.67	3.47						3.85
4	6.11						2.93		2.27
			On average	6.02	2.73	40.6a					2.34	62.9a
37% Avermectin Profenofos missible oil (40g)	1						3.68	2.60		1.40
		2	1.69	1.66		0.86
	3						6.19	2.28		1.22
		4	4.42	1.99		1.27
	On average						4.00	2.13	53.6a	2.06		81.2a
		37% Avermectin Profenofos missible oil (50g)	1	4.94	1.74						0.91
2	2.80						2.17		0.36
			3	4.57	2.31						0.50
4	3.68						1.99		1.36
			On average	4.00	2.05	55.4a					0.783	87.6a
37% Profenofos missible oil (50g)	1						6.92	3.54		3.54
		2	1.84	1.77		1.72
	3						2.80	2.50		1.13
		4	3.61	2.75		3.13
	On average						3.79	2.64	42.6a	2.38		62.2a
		37% abamectin emulsifiable concentrate (50g)	1	7.51	2.71						1.90
2	2.95						1.88		1.00
			3	4.94	1.52						0.82
4	5.16						2.89		1.27
			On average	5.14	2.25	51.1a					1.25	80.2a
Clear water contrast CK	1						5.01	4.55		6.56
		2	2.44	3.24		6.11
	3						3.72	5.46		4.48
		4	1.60	5.02		7.75
	On average						3.19	4.57		6.32

Claims (1)

1. compounded pesticides of preventing and treating rice-stem borer, rice leaf roller is characterized in that being made by the material of following parts by weight:

Wherein, contain Avermectin and Profenofos in the described drug component, and the parts by weight proportioning of the two is 1: 5-25 part;

Described Avermectin is white or the former medicine of yellow crystal;

Described Profenofos is yellowish chromogen medicine;

Described solvent is any in toluene, dimethylbenzene, acetone, the dimethyl formamide;

Described emulsifier is 0201,500 ^#, 602,2210,700 ^#, any two or three composition in the Tween-80, Tx-10, NP-10, neopelex;

Described bleeding agent be in diesel oil, azone, machine oil, peregal, JFC, the organosilicon any or mix with any ratio and to use.