CN104351236A - Weeding composition for sweet corn - Google Patents

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to a weeding composition for sweet corn. The weeding composition comprises the active components of cyclopropanesulfonyl amide, mesotrione, halosulfuron methyl, rimsulfuron and metolachlor. The weeding composition disclosed by the invention has a wide weeding spectrum, varied weeds can be prevented at the same time, the weeding composition has obvious control effects on cyperus rotundus linn. and eleusine indica in a sweet corn field, and the weeding composition has a special effect on the cyperus rotundus linn..

Description

A kind of Herbicidal combinations that can be used for sweet corn

technical field

The invention belongs to technical field of pesticide, be specifically related to a kind of Herbicidal combinations for sweet corn.

background technology

Over nearly 20 years, China's farmland chemical weed control achieves tremendous development, has also produced very large economic benefit.Such as, but the herbicide of various weed killer herbicide spectrum has its limitation, is also restricted during use, and the use year after year of multiple weed killer herbicide, can produce resistance, the rhizome of nutgrass flatsedge, eleusine indica etc. to weeds; Along with the increasing of planting of sweet corn scope in recent years, and the requirement of growth characteristics, higher to the requirement of weed killer herbicide.Therefore, the rationally mixed of agricultural chemicals is current Agrochemicals trend, namely can expand herbicide spectrum, also can widen the use age of medicament.Rationally use with between medicament and produce synergistic effect, reduce product usage amount, strengthen drug effect, also improve the safety on crop and the impact of reduction on succession crop simultaneously.

summary of the invention

The object of the present invention is to provide a kind of both can remove be unearthed the rhizome of nutgrass flatsedge, eleusine indica, can close again be not unearthed the rhizome of nutgrass flatsedge, eleusine indica the Herbicidal combinations for sweet corn.

For achieving the above object, the present invention is by the following technical solutions:

A kind of Herbicidal combinations for sweet corn, the active component of this Herbicidal combinations is cyclopropyl-sulfonylamide, mesotrione, halosulfuronmethyl, rimsulfuron and isopropyl methoxalamine, and the weight ratio of cyclopropyl-sulfonylamide, mesotrione, halosulfuronmethyl, rimsulfuron and isopropyl methoxalamine is 0.5-15:5-20:5-15:1-20:10-20.

The formulation of described Herbicidal combinations is oil-suspending agent.

The Herbicidal combinations of described oil-suspending agent also contains emulsifier, plant wet goods conven-tional adjuvants except containing except active component.

The composition of oil-suspending agent Herbicidal combinations is: cyclopropyl-sulfonylamide 0.5-15%, mesotrione 5-20%, halosulfuronmethyl 5-15%, rimsulfuron 1-20%, isopropyl methoxalamine 10-20, emulsifier 15-22%, the vegetable oil of surplus.

Time prepared by the Herbicidal combinations of oil-suspending agent, five kinds of reactive compounds and emulsifier can be added in vegetable oil and mix by technique preparation routinely; Can measure routinely as required continue to add lubricant, dispersant, antifreezing agent stir evenly.

In raw material used in the present invention, mesotrione be one can suppress medical midbodies of para (ortho)-hydroxybenzoic acetone acid esters dual oxide enzyme (HPPD) bud before and wide spectrum selective herbicide after seedling, there is action of contace poison and lasting effect, easily in plant xylem and phloem conduction, absorbed by weeds very soon after medicine, show blade albefaction, fade, effectively can prevent and treat main broadleaved herb and some grassy weeds, as piemarker, three-coloured amaranth, lamb's-quarters, knotweed, barnyard grass, lady's-grass etc. have good control efficiency, and to acalypha copperleaf and some grassy weed control efficiency poor.

Rimsulfuron be by du pont company in 20th century the mid-80 find and the sulfonylurea herbicide kind succeeded in developing.Bud post processing is taked in dispenser, is conducted rapidly and suppress the synthesis of weeds valine and isoleucine by weeds cauline leaf and root absorption in plant, stops cell division, kills weeds.Within 3 days, turn yellow after susceptible weeds inhales medicine, withered death in 1 ~ 3 week, applicable crops has the ground such as corn, tomato, potato, capsicum to prevent and kill off grass family and broad leaved weed, as lady's-grass, the rhizome of nutgrass flatsedge, dayflower etc., has special efficacy to black nightshade, acalypha copperleaf, the rhizome of nutgrass flatsedge.

Halosulfuronmethyl is applicable to the weedings such as wheat, corn, paddy rice, sugarcane, lawn, halosulfuronmethyl is mainly used in preventing and kill off broad leaved weed and Sha Ke weeds, as storehouse ear, Datura, artemisiifolia, Amaranthus retroflexus, flowerofanhour root or herb, knotweed, kitchen garden, black nightshade, Cassia tora, lead a cow, the rhizome of nutgrass flatsedge etc.

Isopropyl methoxalamine is Syngenta Co., Ltd's development broad spectrum activity herbicides for before-seedling stage, to monocotyledon weed, is mainly absorbed by the young shoot on seed top; Can by young shoot and root absorption to broadleaf weed, the decomposition of Profilin matter, lasting period 20-50 days in soil, to various crop as: soybean, corn, cotton, peanut, potato, Chinese cabbage, spinach, garlic, solanaceous vegetable and orchard, nursery use.

Cyclopropyl-sulfonylamide is the safe auxiliary agent of a class, and it can reduce the absorptive amount of sulfonylurea herbicide in crop, increases its metabolic detoxification speed simultaneously, and sulfonylurea herbicide improves crop safety by adding cyclopropyl-sulfonylamide.

The present invention has selected above five kinds of active components, fabulous synergistic effect is shown in certain ratio range, mixed composition comparatively its single dose significantly improves herbicidal effect, thus reduces application dosage, reduces the impact on environment while cost is used in minimizing; The herbicidal spectrum of Herbicidal combinations of the present invention is wide, can prevent multiple weeds simultaneously, have obvious preventive and therapeutic effect, to sweet corn safety to the sweet corn field rhizome of nutgrass flatsedge, eleusine indica.

embodiment

Embodiment 1

Cyclopropyl-sulfonylamide 1.5%

Mesotrione 5.5%

Halosulfuronmethyl 10%

Rimsulfuron 2.5%

Isopropyl methoxalamine 15%

Emulsifier (7211-E): 22%

Vegetable oil (methyl oleate): surplus.

Embodiment 2

Cyclopropyl-sulfonylamide 0.75%

Mesotrione 20%

Halosulfuronmethyl 5%

Rimsulfuron 7.5%

Isopropyl methoxalamine 13%

Emulsifier (7211-H): 18%

Vegetable oil (soybean oil): surplus.

Embodiment 3

Cyclopropyl-sulfonylamide 10%

Mesotrione 9%

Halosulfuronmethyl 10%

Rimsulfuron 20%

Isopropyl methoxalamine 10%

Emulsifier (7218-Q): 15%

Vegetable oil (methyl oleate): surplus.

Embodiment 4

Cyclopropyl-sulfonylamide 2.25%

Mesotrione 10.5%

Halosulfuronmethyl 15%

Rimsulfuron 10.5%

Isopropyl methoxalamine 18%

Emulsifier (7217-6): 18%

Vegetable oil (soybean oil): surplus.

Embodiment 5

Cyclopropyl-sulfonylamide 3.75%

Mesotrione 13.5%

Halosulfuronmethyl 7.5%

Rimsulfuron 13.5%

Isopropyl methoxalamine 20%

Emulsifier (7211-E): 18%

Vegetable oil (corn oil): surplus.

Emulsifier 7211-E, 7211-H, 7218-Q, 7217-6 in embodiment are purchased from Nanjing Teva-Chem. Co., Ltd..

Effect experimental:

(1) test site

Sweet corn farm, Horqin, Xinye County, Nanyang City, Henan Province, weeds are with the rhizome of nutgrass flatsedge, eleusine indica for subjects, and sweet corn seeds is gold sweet 2000.

(2) key instrument

3WT-II type spray tower, Beijing Lei Qianna green technology Development Co., Ltd; Germany GA110 type ten thousand/electronic balance.

(3) test process

A, reagent agent

The former medicine of mesotrione is provided by Shandong Binnong Technology Co., Ltd., rimsulfuron is provided by Jiangsu Agricultural Hormone Engineering Technology Research Centre Co., Ltd., halosulfuronmethyl is provided by Jiangsu Agricultural Hormone Engineering Technology Research Centre Co., Ltd., cyclopropyl-sulfonylamide is provided by Heilungkiang Long He Chemical Co., Ltd., and isopropyl methoxalamine is provided by Shandong Binnong Technology Co., Ltd..

On preliminary survey basis, using embodiment 1-5 as 5 process, 15% mesotrione and 7.5% halosulfuronmethyl are 2 and contrast medicament, not spraying medicine water spray is blank.In table 1

B, test repeat

Often process repetition 3 times, often process a community, each plot area: length × wide=3m × 1m=3m at every turn ², every community rhizome of nutgrass flatsedge, each 20 strains of eleusine indica, sweet corn line-spacing is 50cm, and spacing in the rows is 30cm, totally 33 strains of every community sweet corn.

(4) processing mode

Test shares medicine 1 time.Spraying time is afternoon on June 30th, 2014, and temperature is at about 32 DEG C; In the rhizome of nutgrass flatsedge 3-4 leaf phase, the eleusine indica 3-4 leaf phase, the sweet corn 4-7 leaf phase, process, spouting liquid is according to 450-500 kilogram of/hectare of calculating, and even spraying, makes weeds, maize leaf evenly by medicine.

(5) investigation records

Investigation method, difference 4 days, 7 days after administration, adopts observational survey, the victimization state of record weeds and crop; Within after dispenser 20 days, adopt absolute investigation method, cut off the whole strain of weeds of survival with blade along soil surface, calculate fresh weight inhibition, observe crop damage situation.

(6) results and analysis

A, investigation result

Investigation before medicine, the corn 4-7 leaf phase, based on 4 leaf 1 heart stages, field main weeds based on the rhizome of nutgrass flatsedge, eleusine indica, all in the 3-4 leaf phase.

After medicine, first time observes, and compares, on July 5th, 2014, sweet corn 5-7 leaf phase with blank.In table 2

After medicine, second time is observed, and compares, on July 13rd, 2014, sweet corn 7 leaf 1 heart stage with blank.In table 3

After medicine, third time observes, and compare with blank, on August 3rd, 2014, sweet corn plant height 65-70cm, adopts absolute investigation method, cuts off the whole strain of weeds of survival with blade along soil surface, calculates fresh weight inhibition, observes crop damage situation.In table 4

B, interpretation of result

Result of the test shows, cyclopropyl-sulfonylamide, mesotrione, halosulfuronmethyl, rimsulfuron, isopropyl methoxalamine use with the inhibiting rate of each combination to two kinds of weeds be on the occasion of, and be 100% to the safety coefficient of sweet corn, show certain synergy, safety effect, inhibiting rate to weeds and the safety to sweet corn, all higher than single preparation 15% mesotrione and 7.5% halosulfuronmethyl, particularly have optimum inhibition to the rhizome of nutgrass flatsedge.In 5 proportionings of embodiment 1-5, lower to two kinds of careless preventive effects under low consumption, the wherein Herbicidal combinations of embodiment 5, to the fresh weight inhibition of the rhizome of nutgrass flatsedge, eleusine indica more than 95%, to sweet corn safety.Comprehensively to two kinds of careless overall preventive effects, from considerations such as the balances of cost, preventive effect, safety and formula, cyclopropyl-sulfonylamide, mesotrione, halosulfuronmethyl, rimsulfuron and the weight ratio of isopropyl methoxalamine are mixed best results near 3.75:13.5:7.5:13.5:20.

Herbicidal combinations of the present invention, dispenser is after 3 days, and albefaction, decolouring phenomenon appear in weeds, can see obvious weeding phenomenon in the short time; After 7 days, the broad leaved weed of 3-4 leaf phase is withered, and grassy weed albefaction is more serious; After 7-10 days, all embodiments to the inhibiting rate of the rhizome of nutgrass flatsedge more than 89.5%.After 20 days, field observation, not there is phenomenon of turning green in weeds.And rear stubble weeds do not appear in field, in the good situation of soil moisture content, can more than 95% be reached to the sealing process of weeds of not being unearthed.

Claims (3)

1. the Herbicidal combinations for sweet corn, it is characterized in that, the active component of this Herbicidal combinations is cyclopropyl-sulfonylamide, mesotrione, halosulfuronmethyl, rimsulfuron and isopropyl methoxalamine, and the weight ratio of cyclopropyl-sulfonylamide, mesotrione, halosulfuronmethyl, rimsulfuron and isopropyl methoxalamine is 0.5-15:5-20:5-15:1-20:10-20.

2., as claimed in claim 1 for the Herbicidal combinations of sweet corn, it is characterized in that, the formulation of described Herbicidal combinations is oil-suspending agent.

3. as claimed in claim 2 for the Herbicidal combinations of sweet corn, it is characterized in that, the Herbicidal combinations of described oil-suspending agent also contains conven-tional adjuvants except containing except active component.