CN109169061A - A kind of method of coix lacryma-jobi non-polluted cultivation - Google Patents

Abstract

The present invention provides a kind of method of coix lacryma-jobi non-polluted cultivation, the cultural method of the coix lacryma-jobi is as follows: selection meets the planting base of nuisanceless coix lacryma-jobi production standard, and selects high-quality resistance to sick new varieties；After preceding stubble harvest, stubble-cleaning, site preparation is carried out in conjunction with basal dressing；By coix seed sunning, seed selection before sowing, suitable method for treating seeds is selected according to controlling object difference；Suitable date of seeding is selected according to height above sea level height is different, is sowed by the way of bunch planting, final singling, intertillage, artificial weeding；Using based on base manure, the principle supplemented by top dressing applies fertilizers scientifically；Carry out disease pest and weed integrated control；Threshing processing, packaging storage and byproduct for treatment are carried out to the coix seed of harvest.Method provided by the invention is rationally effective, and the myotonin produced by this method is best in quality, stable yield, safety nuisance free, and planting benefit is higher, and management method is easily operated, has strong promotion and application value.

Description

A kind of method of coix lacryma-jobi non-polluted cultivation

Technical field

The invention mainly relates to the technical fields of coix lacryma-jobi plantation, and in particular to a kind of method of coix lacryma-jobi non-polluted cultivation.

Background technique

Semen Coicis is called: semen coicis, the seed of jog's tears, maize, are the kernel of gramineae, cool in nature, sweet in flavor, light, are entered Spleen, lung, kidney channel have effects that Li Shui, invigorating the spleen, eliminating impediment, clearing away heat and eliminating pus.Semen Coicis has the characteristics that be easy to be digested absorption, no By for nourishing or for medical treatment, effect all mitigates very much.In existing coix lacryma-jobi planting technology, due to the limitation of technology, lead The coix lacryma-jobi planted out is caused, yield is unstable, and pesticide residue is big, and planting benefit is low, and the myotonin quality being process can not It is optimal matter.

Summary of the invention

It is mentioned above in the background art to solve invention broadly provides a kind of method of coix lacryma-jobi non-polluted cultivation The technical issues of technology.

The present invention solves the technical solution that above-mentioned technical problem uses are as follows:

A kind of method of coix lacryma-jobi non-polluted cultivation, which is characterized in that the cultural method of the coix lacryma-jobi is as follows:

S1: selection meets the planting base of nuisanceless coix lacryma-jobi production standard, and selects high-quality resistance to sick new varieties；

S2: after preceding stubble harvest, stubble-cleaning, site preparation is carried out in conjunction with basal dressing；

S3: by coix seed sunning, seed selection before sowing, suitable method for treating seeds is selected according to controlling object difference；

S4: suitable date of seeding is selected according to height above sea level height is different, is sowed by the way of bunch planting, final singling, intertillage, artificial weeding；

S5: using based on base manure, the principle supplemented by top dressing applies fertilizers scientifically；

S6: disease pest and weed integrated control is carried out；

S7: threshing processing, packaging storage and byproduct for treatment are carried out to the coix seed of harvest.

Preferably, production base surrounding accomplishes no industrial and mining enterprises' pollution, away from hospital, main traffic main line, resident accumulation regions There is 2 kilometers of obvious pollution sources region or more, and base water condition is good, irrigation and drainage are convenient, and soil property is with sandy soil, sandy loam, loam , it is desirable that plough horizon is deep, fertile, permeability is good, pH value 5.2-7.0, content of organic matter 1.5%-2.3%, and water conservation is protected Fertile ability is prominent；High-quality resistance to sick new varieties are selected, avoid planting single variety throughout the year.

Preferably, the standard of site preparation: carrying out stubble-cleaning to preceding crop stalk and weeds with small mower, then with dilatory Machine turns over plot plough, depth 20-25cm.

Preferably, decomposed animal fecaluria 1500-2000kg or refined organic fertilizer 450-500kg, calcium superphosphate are applied per acre 25-30kg makees base manure, thin with gang harrow, and 7d trench digging is furrow, furrow wide 150cm, furrow width 50cm, ditch depth 25cm, every 20m before sowing A waist ditch is opened, surrounding, which is opened, encloses ditch, ditch depth 30cm, furrow width 40cm, it is ensured that row irrigation is unobstructed.

Preferably, in the organic fertilizer, organic matter >=45%, the nitrogen, phosphorus and potassium mixing quality >=5%.

Preferably, the seed treatment step is specific as follows:

1) bask seeds: selection fine day shines 3-5 days, utilizes solar ultraviolet disinfection and deinsectization；

2) choose seeds: selection by winnowing, the modes such as wet concentration being selected to remove immature seed, sky, empty grain and pest and disease damage grain, retain grain it is big, Full seed is stand-by；

3) it sterilizes:

A. the seed coat agent containing Tebuconazole is used to dress seed；

B. it hots water treatment of seeds: first seed being put into clear water and is soaked 18 hours, then move on to and preheat 5 points in the warm water for be dipped in 45-50 DEG C Clock, then change in the lukewarm water for be dipped in 55-60 DEG C 10 minutes, it is then put into cold water and soaks seed, until requirement until reaching germination；

C. fungicide seed treatment: seed total amount is pressed with the carbendazol wettable powder of seed weight 0.5% or with 50% thiophanate methyl 0.4%-0.5% dress seed.

Preferably, height above sea level is in the area sowing of 800m or more generally in late March to early April；Height above sea level is in 400-800m Area sowing generally in the first tenday period of a month in late April to May；Height above sea level must not sow at the latest in the area below 400m to be later than by the end of May, is pressed Seeding row spacing 40cm opens cave, and 5-6, every bunch planting seed, then earthing flattens.

Preferably, when seedling grows 3-4 piece true leaf, first time thinning is carried out, extracts more population, sick and weak seedling, keeps spacing in the rows 5-7cm；When seedling has 5-6 piece true leaf, final singling is carried out by spacing in the rows 13-16cm, first time intertillage is generally carried out in height of seedling 5-7cm Weeding promotes the more tillers of coix lacryma-jobi；Second of tillage and weeding is carried out in height of seedling 15-20cm；It is carried out later in combination with fertilising.

Preferably, nuisanceless coix lacryma-jobi apply fertilizer when, use based on base manure, supplemented by top dressing, base manure account for the 80% of total fertilizer application amount with On, and top dressing should see that seedling applies fertilizer, total dosage control harvests first 30 days in coix lacryma-jobi within 20% and no longer applies any type Top dressing；The principle of base manure mainly based on organic fertilizer, the base manure of nuisanceless coix lacryma-jobi production, based on decomposed farmyard manure, adapted is raw Organic fertilizer is forbidden to use chemistry and bio-feritlizer without country, the registration of provincial agricultural sector；It is forbidden to use content of beary metal Exceeded fertilizer and nitrate fertilizer；Top dressing should stress nitrogen fertilizer application early period, and ear period should stress to apply phosphorus potash fertilizer.

Preferably, in the step S6, the concrete operations mode of disease pest and weed is as follows:

1) cultural control uses the kind of better resistance, and kind is rotated at regular intervals, using rational tillage system, crop rotation, breeding In conjunction with；

2) it is ploughed deeply as far as possible when machinery is turned over before sowing, most of overwintering pest can be eliminated, reduce worm sources radix；

3) Lepidoptera, homoptera pest are trapped and killed using black light lamp, frequency ventilating type insecticidal lamp, colour table physical unit, it is anti-by every lamp control 30-50 mus of arrangements, lamp are mounted in the tree trunk or electric pole high from 1.5-2 meters of crop, and during the 4-9 month, whens every night 8 is opened Lamp, whens morning 6, turn off the light, if meeting strong wind, thunderstorm weather should turn off the light at night；

4) biological agent is utilized, under the premise of not producing any toxic side effects, ensuring that Environmental security, product are non-harmful, trapping Pest, the control method for controlling disease: gyplure prevents and treats mythimna separata and corn borer；In each generation adult occurance peak, mu is viscous with 6-8 pieces Worm and corn borer lure are placed in coix lacryma-jobi field；

5) chemical control: the banned pesticides that should be strictly forbidden to use country's promulgation when chemical agent medication are being selected, are being received in coix lacryma-jobi It obtains in first 30 days and is forbidden to use any kind of chemical pesticide；

6) smut early stage spray 800 times of liquid of 70% thiophanate-methyl wettable powder or 50% carbendazol wettable powder into Row prevention and treatment, leaf blight early stage spray 1000 times of liquid of 50% carbendazol wettable powder or 50% mancozeb wettable powder It is anti-；

7) corn borer prevention and treatment can fill young leaves prevention and treatment with 300 times of liquid of bacillus thuringiensis (Bt) emulsion, the armyworm larvae phase with 25 grams/ It rises decis or 5% gamma cyhalothrin is watered spraying prevention and treatment；

8) weed control: first is that reinforce artificial weeding, second is that after planting using Herbicidal agent such as Acetochlor to prevent and treat in coix lacryma-jobi Annual or perennial weeds harvests first 45 days in coix lacryma-jobi and is forbidden to use any herbicide.

The present invention solves the technical solution that above-mentioned technical problem uses are as follows:

Method provided by the invention is rationally effective, and the myotonin produced by this method is best in quality, stable yield, peace Completely without public hazards, planting benefit is higher, and management method is easily operated, has strong promotion and application value.

Detailed explanation is carried out to the present invention below with reference to specific embodiment.

Specific embodiment

The existing various exemplary embodiment that the present invention will be described in detail, the detailed description are not considered as to limit of the invention System, and it is understood as the more detailed description to certain aspects of the invention, characteristic and embodiment.

Without departing substantially from the scope or spirit of the invention, the specific embodiment of description of the invention can be done more Kind improvements and changes, this will be apparent to those skilled in the art, other realities obtained by specification of the invention Apply mode for technical personnel and be apparent, present specification and embodiment are merely exemplary；

S1: selection meets the planting base of nuisanceless coix lacryma-jobi production standard, and selects high-quality resistance to sick new varieties:

Production base surrounding accomplishes no industrial and mining enterprises' pollution, has obvious pollution sources away from hospital, main traffic main line, resident accumulation regions 2 kilometers of region or more, and base water condition is good, and irrigation and drainage are convenient, and soil property is with sandy soil, sandy loam, loam, it is desirable that soil Arable layer is deep, fertile, permeability is good, pH value 5.2-7.0, content of organic matter 1.5%-2.3%, and retain water and nutrients ability is prominent；Choosing With high-quality resistance to sick new varieties, avoid planting single variety throughout the year；

S2: after preceding stubble harvest, stubble-cleaning, site preparation is carried out in conjunction with basal dressing:

Stubble-cleaning is carried out to preceding crop stalk and weeds with small mower, is then turned over plot plough with tractor, depth 20- 25cm；Decomposed animal fecaluria 1500-2000kg or refined organic fertilizer 450-500kg are applied per acre, and calcium superphosphate 25-30kg makees base Fertilizer, thin with gang harrow, 7d trench digging does furrow before sowing, and furrow wide 150cm, furrow width 50cm, ditch depth 25cm, every 20m open a waist ditch, Surrounding, which is opened, encloses ditch, ditch depth 30cm, furrow width 40cm, it is ensured that row irrigation is unobstructed；In the organic fertilizer, organic matter >=45% is described Nitrogen, phosphorus and potassium mixing quality >=5%；

S3: by coix seed sunning, seed selection before sowing, suitable method for treating seeds is selected according to controlling object difference:

1) bask seeds: selection fine day shines 3-5 days, utilizes solar ultraviolet disinfection and deinsectization；

2) choose seeds: selection by winnowing, the modes such as wet concentration being selected to remove immature seed, sky, empty grain and pest and disease damage grain, retain grain it is big, Full seed is stand-by；

3) it sterilizes:

A. the seed coat agent containing Tebuconazole is used to dress seed；

B. it hots water treatment of seeds: first seed being put into clear water and is soaked 18 hours, then move on to and preheat 5 points in the warm water for be dipped in 45-50 DEG C Clock, then change in the lukewarm water for be dipped in 55-60 DEG C 10 minutes, it is then put into cold water and soaks seed, until requirement until reaching germination；

C. fungicide seed treatment: seed total amount is pressed with the carbendazol wettable powder of seed weight 0.5% or with 50% thiophanate methyl 0.4%-0.5% dress seed；

S4: suitable date of seeding is selected according to height above sea level height is different, is sowed by the way of bunch planting, final singling, intertillage, artificial weeding:

Height above sea level is sowed in the area of 800m or more generally in late March to early April；Area sowing one of the height above sea level in 400-800m As in the first tenday period of a month in late April to May；Height above sea level must not sow at the latest in the area below 400m to be later than by the end of May.It is opened by seeding row spacing 40cm Cave, 5-6, every bunch planting seed, then earthing flattens；When seedling grows 3-4 piece true leaf, first time thinning is carried out, is extracted dense Seedling, sick and weak seedling keep spacing in the rows 5-7cm；When seedling has 5-6 piece true leaf, final singling is carried out by spacing in the rows 13-16cm；Generally in height of seedling 5- First time tillage and weeding is carried out when 7cm, promotes the more tillers of coix lacryma-jobi；Second of tillage and weeding is carried out in height of seedling 15-20cm；After It is carried out in combination with fertilising；

S5: using based on base manure, the principle supplemented by top dressing applies fertilizers scientifically；

When nuisanceless coix lacryma-jobi is applied fertilizer, use based on base manure, supplemented by top dressing, base manure accounts for 80% or more of total fertilizer application amount, and top dressing is answered See that seedling applies fertilizer, total dosage control harvests first 30 days in coix lacryma-jobi within 20% and no longer applies any kind of top dressing；Base manure Principle mainly based on organic fertilizer, the base manure of nuisanceless coix lacryma-jobi production, based on decomposed farmyard manure, adapted biological organic fertilizer is prohibited Only use chemistry and bio-feritlizer without country, the registration of provincial agricultural sector；It is forbidden to use the exceeded fertilizer of content of beary metal And nitrate fertilizer；Top dressing should stress nitrogen fertilizer application early period, and ear period should stress to apply phosphorus potash fertilizer；

S6: disease pest and weed integrated control is carried out:

1) cultural control uses the kind of better resistance, and kind is rotated at regular intervals, using rational tillage system, crop rotation, breeding In conjunction with；

2) it is ploughed deeply as far as possible when machinery is turned over before sowing, most of overwintering pest can be eliminated, reduce worm sources radix；

3) Lepidoptera, homoptera pest are trapped and killed using black light lamp, frequency ventilating type insecticidal lamp, colour table physical unit, it is anti-by every lamp control 30-50 mus of arrangements, lamp are mounted in the tree trunk or electric pole high from 1.5-2 meters of crop, and during the 4-9 month, whens every night 8 is opened Lamp, whens morning 6, turn off the light, if meeting strong wind, thunderstorm weather should turn off the light at night；

4) biological agent is utilized, under the premise of not producing any toxic side effects, ensuring that Environmental security, product are non-harmful, trapping Pest, the control method for controlling disease: gyplure prevents and treats mythimna separata and corn borer；In each generation adult occurance peak, mu is viscous with 6-8 pieces Worm and corn borer lure are placed in coix lacryma-jobi field；

5) chemical control: the banned pesticides that should be strictly forbidden to use country's promulgation when chemical agent medication are being selected, are being received in coix lacryma-jobi It obtains in first 30 days and is forbidden to use any kind of chemical pesticide；

6) smut early stage spray 800 times of liquid of 70% thiophanate-methyl wettable powder or 50% carbendazol wettable powder into Row prevention and treatment, leaf blight early stage spray 1000 times of liquid of 50% carbendazol wettable powder or 50% mancozeb wettable powder It is anti-；

7) corn borer prevention and treatment can fill young leaves prevention and treatment with 300 times of liquid of bacillus thuringiensis (Bt) emulsion, the armyworm larvae phase with 25 grams/ It rises decis or 5% gamma cyhalothrin is watered spraying prevention and treatment；

8) weed control: first is that reinforce artificial weeding, second is that after planting using Herbicidal agent such as Acetochlor to prevent and treat in coix lacryma-jobi Annual or perennial weeds harvests first 45 days in coix lacryma-jobi and is forbidden to use any herbicide；

S7: threshing processing, packaging storage and byproduct for treatment are carried out to the coix seed of harvest:

Coix lacryma-jobi harvest, transport, storage and processing and byproduct for treatment requirement are as follows: when coix lacryma-jobi maturity reaches 80%-85%, select fine day It harvests in batches, forbids in highway, bituminous pavement and seriously polluted local threshing, shines paddy；Means of transport should be cleaned, be dried, and be had Rain-proof facility is forbidden and the mixed fortune of toxic, harmful, the peculiar smell that is corrosive, has article；It is being protected from light, room temperature, drying and having moisture-proof set The place storage applied, storage facilities should clean, dry, divulging information, without insect pest and the plague of rats, forbid with it is toxic, harmful, be corrosive, Easy mouldy, the peculiar smell that becomes damp, has article is mixed to be deposited；It processes around the place of nuisanceless coix lacryma-jobi without pollution sources, processes workshop and protect Purification production is held, is forbidden using chemical synthesis agent, and the program through initial survey, reinspection, sampling observation is rigid in checking up.

The foregoing is merely the schematical specific embodiments of the present invention, before not departing from conceptions and principles of the invention It puts, the equivalent changes and modifications that any those skilled in the art is made should belong to the scope of protection of the invention.

Claims (10)

1. a kind of method of coix lacryma-jobi non-polluted cultivation, which is characterized in that the cultural method of the coix lacryma-jobi is as follows:

S1: selection meets the planting base of nuisanceless coix lacryma-jobi production standard, and selects high-quality resistance to disease

New varieties；

S2: after preceding stubble harvest, stubble-cleaning, site preparation is carried out in conjunction with basal dressing；

S3: by coix seed sunning, seed selection before sowing, suitable method for treating seeds is selected according to controlling object difference；

S4: suitable date of seeding is selected according to height above sea level height is different, is sowed by the way of bunch planting, final singling, intertillage, artificial weeding；

S5: using based on base manure, the principle supplemented by top dressing applies fertilizers scientifically；

S6: disease pest and weed integrated control is carried out；

S7: threshing processing, packaging storage and byproduct for treatment are carried out to the coix seed of harvest.

2. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that production base surrounding is accomplished No industrial and mining enterprises' pollution, has 2 kilometers of obvious pollution sources region or more, and base away from hospital, main traffic main line, resident accumulation regions Ground water condition is good, and irrigation and drainage are convenient, and soil property is with sandy soil, sandy loam, loam, it is desirable that plough horizon is deep, fertile, penetrating Property good, pH value 5.2-7.0, content of organic matter 1.5%-2.3%, retain water and nutrients ability is prominent；High-quality resistance to sick new varieties are selected, are avoided Plantation single variety throughout the year.

3. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that the standard of site preparation: with small Type grass trimmer carries out stubble-cleaning to preceding crop stalk and weeds, is then turned over plot plough with tractor, depth 20-25cm.

4. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that apply decomposed animal per acre Fecaluria 1500-2000kg or refined organic fertilizer 450-500kg, calcium superphosphate 25-30kg makees base manure, thin with gang harrow, sowing Preceding 7d trench digging does furrow, and furrow wide 150cm, furrow width 50cm, ditch depth 25cm, every 20m open a waist ditch, and surrounding, which is opened, encloses ditch, ditch depth 30cm, Furrow width 40cm, it is ensured that row irrigation is unobstructed.

5. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 4, which is characterized in that in the organic fertilizer, institute State organic matter >=45%, the nitrogen, phosphorus and potassium mixing quality >=5%.

6. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that the seed treatment step It is specific as follows:

1) bask seeds: selection fine day shines 3-5 days, utilizes solar ultraviolet disinfection and deinsectization；

2) choose seeds: selection by winnowing, the modes such as wet concentration being selected to remove immature seed, sky, empty grain and pest and disease damage grain, retain grain it is big, Full seed is stand-by；

3) it sterilizes:

A. the seed coat agent containing Tebuconazole is used to dress seed；

B. it hots water treatment of seeds: first seed being put into clear water and is soaked 18 hours, then move on to and preheat 5 points in the warm water for be dipped in 45-50 DEG C Clock, then change in the lukewarm water for be dipped in 55-60 DEG C 10 minutes, it is then put into cold water and soaks seed, until requirement until reaching germination；

C. fungicide seed treatment: seed total amount is pressed with the carbendazol wettable powder of seed weight 0.5% or with 50% thiophanate methyl 0.4%-0.5% dress seed.

7. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that height above sea level is 800m's or more Area sowing is generally in late March to early April；Height above sea level is sowed generally on late April to May in the area of 400-800m Ten days；Height above sea level must not sow at the latest in the area below 400m to be later than by the end of May, opens cave, every bunch planting seed 5-6 by seeding row spacing 40cm Grain, then earthing flattens.

8. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that it is true that seedling grows 3-4 piece Ye Shi carries out first time thinning, extracts more population, sick and weak seedling, keeps spacing in the rows 5-7cm；When seedling has 5-6 piece true leaf, by spacing in the rows 13-16cm carries out final singling, and first time tillage and weeding is generally carried out in height of seedling 5-7cm, promotes the more tillers of coix lacryma-jobi；In height of seedling 15- Second of tillage and weeding is carried out when 20cm；It is carried out later in combination with fertilising.

9. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that nuisanceless coix lacryma-jobi fertilising When, it uses based on base manure, supplemented by top dressing, base manure accounts for 80% or more of total fertilizer application amount, and top dressing should see that seedling applies fertilizer, total dosage control System harvests first 30 days in coix lacryma-jobi within 20% and no longer applies any kind of top dressing；The original of base manure mainly based on organic fertilizer Then, the base manure of nuisanceless coix lacryma-jobi production, based on decomposed farmyard manure, adapted biological organic fertilizer is forbidden to use without country, saves The chemistry and bio-feritlizer of grade agricultural sector registration；It is forbidden to use content of beary metal exceeded fertilizer and nitrate fertilizer；Before top dressing Phase should stress nitrogen fertilizer application, and ear period should stress to apply phosphorus potash fertilizer.

10. a kind of method of coix lacryma-jobi non-polluted cultivation according to claim 1, which is characterized in that in the step S6, The concrete operations mode of disease pest and weed prevention and treatment is as follows:

1) cultural control uses the kind of better resistance, and kind is rotated at regular intervals, using rational tillage system, crop rotation, breeding In conjunction with；

2) it is ploughed deeply as far as possible when machinery is turned over before sowing, most of overwintering pest can be eliminated, reduce worm sources radix；

3) Lepidoptera, homoptera pest are trapped and killed using black light lamp, frequency ventilating type insecticidal lamp, colour table physical unit, it is anti-by every lamp control 30-50 mus of arrangements, lamp are mounted in the tree trunk or electric pole high from 1.5-2 meters of crop, and during the 4-9 month, whens every night 8 is opened Lamp, whens morning 6, turn off the light, if meeting strong wind, thunderstorm weather should turn off the light at night；

4) biological agent is utilized, under the premise of not producing any toxic side effects, ensuring that Environmental security, product are non-harmful, trapping Pest, the control method for controlling disease: gyplure prevents and treats mythimna separata and corn borer；In each generation adult occurance peak, mu is viscous with 6-8 pieces Worm and corn borer lure are placed in coix lacryma-jobi field；

5) chemical control: the banned pesticides that should be strictly forbidden to use country's promulgation when chemical agent medication are being selected, are being received in coix lacryma-jobi It obtains in first 30 days and is forbidden to use any kind of chemical pesticide；

6) smut early stage spray 800 times of liquid of 70% thiophanate-methyl wettable powder or 50% carbendazol wettable powder into Row prevention and treatment, leaf blight early stage spray 1000 times of liquid of 50% carbendazol wettable powder or 50% mancozeb wettable powder It is anti-；

7) corn borer prevention and treatment can fill young leaves prevention and treatment with 300 times of liquid of bacillus thuringiensis (Bt) emulsion, the armyworm larvae phase with 25 grams/ It rises decis or 5% gamma cyhalothrin is watered spraying prevention and treatment；

8) weed control: first is that reinforce artificial weeding, second is that after planting using Herbicidal agent such as Acetochlor to prevent and treat in coix lacryma-jobi Annual or perennial weeds harvests first 45 days in coix lacryma-jobi and is forbidden to use any herbicide.