CN106973674A - High yield naked oats cultural method - Google Patents

Abstract

The invention discloses a kind of high yield naked oats cultural method, comprise the following steps：S1. selection of land site preparation：Stubble is the soil of pulse family or potato before selection, and tilling depth is more than 20cm, and every mu of paving of being ploughed during early autumn applies farm manure more than 5000 kilograms；S2. variety selection：Oat varieties is selected according to the fertility in soil；S3. seed treatment：Debris in the seed chosen in S2 is rejected, seed purity is reached more than 96%, cleanliness reaches more than 98%, and germination percentage reaches more than 90%；S4. the sowing time is determined：Sowing time is 20 ~ June 4 May；S5. application rate is determined：Every mu is sowed 25 ~ 320,000 plants, and the every mu of amount of broadcasting is 9 ~ 10 kilograms；S6. sow：Very little with 26 ~ 30cm of line-spacing, the sowing of depth 3 ~ 5cm little progress row after planting needs suppression in time；S7. field management：Take weeding to the jointing stage after emerging, aphid prophylactic measures of going out；Taken after jointing to heading stage and topdress, prevent and treat mythimna separata measure；After neat fringe foliage top dressing measure is taken to the maturity period.

Description

High yield naked oats cultural method

Technical field

The present invention relates to field of plant growing technology, it particularly relates to a kind of high yield naked oats cultural method.

Background technology

Naked oats is a kind of low sugar, high nutrition, the food of high energy, and grain both can be edible for flour milling, can also make feed, It is all very high in the economic value of nutrition, health care and the field such as feeding.In addition modern pursues health diet, naked oats conduct Coarse food grain is frequently utilized for making the food such as oatmeal, and how society improves naked oats to the demand of naked oats also more and more higher Yield so as to meet society demand so that create more economic values as current peasant cultivation naked oats most concerned about The problem of.

The problem of in correlation technique, effective solution is not yet proposed at present.

The content of the invention

For the above-mentioned technical problem in correlation technique, the present invention proposes a kind of high yield naked oats cultural method, can Effectively improve the yield of naked oats.

To realize above-mentioned technical purpose, the technical proposal of the invention is realized in this way：

A kind of high yield naked oats cultural method, comprises the following steps：

S1. selection of land site preparation：Stubble is the soil of pulse family or potato before selection, and tilling depth is more than 20cm, ploughed every mu during early autumn Paving applies farm manure more than 5000 kilograms, and Measures on Soil Moisture Conservation need to be taken during early spring；

S2. variety selection：Naked oats kind is selected according to the fertility in soil；

S3. seed treatment：Debris in the seed chosen in S2 is rejected, seed purity is reached more than 96%, cleanliness reaches More than 98%, germination percentage reaches more than 90%, selects calm fine day to bask seeds 3 ~ 4 days, and sowing is preceding to use the double seed dressings of seed dressing, and usage amount is to plant The 0.3% of sub- weight；

S4. the sowing time is determined：Sowing time is 20 ~ June 4 May；

S5. application rate is determined：Every mu is sowed 25 ~ 320,000 plants, and the every mu of amount of broadcasting is 9 ~ 10 kilograms；

S6. sow：With 26 ~ 30cm of line-spacing, 3 ~ 5cm of depth is sowed, and after planting needs suppression in time；

S7. field management：Take weeding to the jointing stage after emerging, aphid prophylactic measures of going out；Take and chase after to heading stage after jointing Fertilizer, preventing and treating mythimna separata measure；After neat fringe foliage top dressing measure is taken to the maturity period.

Further, the soil in step S1 also meets following index：Contain full nitrogen more than 0.15%, instant nitrogenousfertilizer in soil More than 80PPm, more than rapid available phosphorus 20PPm, pH value 7-8.

Further, the standard of variety selection is in step S2, the naked oats kind of the soil selection plantation of medium fertility For dam oats 1 or white swallow No. 2, the cool naked oats kind of area and irrigated land selection plantation of high fertility soil, Po Liang is Ji Oats 2.

Further, in step S4, when oats No. 1 naked oats in dam is planted in two cloudy beaches and slope beam, 20~May of May Sowed within 25th, No. 2 naked oatses of Bai Yan are sowed in 25~June 4 May, Ji No. 2 naked oatses of oats water and slope beam Cool area plantation when, sowed 20~May 25 May.

Further, No. 2 naked oatses of Bai Yan are broadcast in the plantation of sandy and preceding Mountain area 30 ~ June 4 May Kind, other soils are sowed 25 ~ May 30 May.

Further, in step S5, when plantation soil is nonirrigated farmland, every mu is sowed 25 ~ 300,000 plants, and plantation soil is water When, every mu is sowed 30 ~ 320,000 plants.

Further, in the case that 1 year autumn do not spread and apply farm manure on soil, spring, every mu of soil need to add 2000 Kilogram farm manure, every mu of soil also needs to add 30 ~ 50 kilograms of calcium superphosphate or the ammonium of 3.5 ~ 5 kg of phosphoric acid two.

Further, weeding measure described in step S7 is implemented twice altogether, when growing to three leaves wholeheartedly for the first time for wheat seeding, When growing to five leaves wholeheartedly for the second time for wheat seeding；When the aphid prophylactic measures action opportunity that goes out reaches 50% for the strain of wheatland aphid, use The decis or 40% 600 times of liquid of Rogor of 800 times of liquid spray and controlled, and every mu sprays 40 kilograms of decoction.

Further, in step S7, when there is fertilizer deficiency phenomenon into heading stage after the jointing, take advantage of rain and topdress 1 time, often Mu paving applies 10 kilograms of urea；When the opportunity of the preventing and treating sticking reaches more than 80% for wheatland mythimna separata egg hatching rate, using 50% enemy 800~1000 times of liquid sprays of dichlorvos emulsion are controlled, and every mu sprays 40~50 kilograms of decoction.

Further, in step S7, the time of the foliage top dressing material is the flowering pustulation period, and every mu uses potassium dihydrogen phosphate 100 grams, add water 50~70 kilograms, sprayed when selection fine day 5 points of later or cloudy days of afternoon are without rain.

Beneficial effects of the present invention：Each plantation step is harvested from selection of land site preparation to later stage the invention provides naked oats Operating method, at the same also cover selection of land, seed selection, select sowing opportunity method, fertilising, the opportunity of supplementary fertilizer, species and specifically Operating method, opportunity, species and the concrete operation method of insect pest preventing and controlling, by using naked oats breeding method of the present invention, Naked oats yield can be effectively improved.

Embodiment

The technical scheme of invention is clearly and completely described below by specific embodiment, it should be appreciated that it is only For explaining the technical scheme in the present invention, the limitation present invention is not used in.The various raw materials that occur in embodiment, machinery, equipment Commercially obtained without specified otherwise.

First, the various professional terms occurred in the present invention are briefly described.

Early autumn：Mid-September to mid-October.

Early spring：Mid-March to mid-April.

Seed dressing is double：Seed dressing double is a kind of bactericide, can be obtained by commercial sources, its have efficiently, wide spectrum the characteristics of, be used for Dressing is to a variety of cereal crop smut, disease in cotton seedling stage and the bluish dogbane anthracnose by seed dispersal, with preferable Prevention effect.

Soil medium fertility：By weight calculating, 1.1-1.5% containing organic matter（Weight ratio）, full nitrogen 0.09-0.13%, speed Imitate phosphorus 0.07-0.10%, available potassium 0.2-0.4%.

The high fertility of soil：1.5-2.2% containing organic matter（Weight ratio）, full nitrogen 0.13-0.20%, rapid available phosphorus 0.10-0.25%, Available potassium 0.4-0.5%.

Seed purity：Certified seed accounts for the percentage of sum.

Physical purity of seed：Grain weight accounts for the percentage of gross weight, and it is qualified that grain weight is not necessarily, outside native stone, weeds etc. All belong to seed.

Suppression：Suppression is one of arable farming measure, is the operation for table soil or seedling level with a roller pressure with land presser etc., can It is divided into earth pack and seedling stage suppression.

Foliage top dressing：It is to be ejected into blade face with appropriate nutrient solution, to lack nitrogen, phosphorus, potassium etc. during solving plant growth A kind of fertilizing method of the trace element such as a great number of elements and iron, boron, zinc, manganese molybdenum.

Full nitrogen：Nitrogen in soil can be divided into organic nitrogen and inorganic nitrogen, and both sums are referred to as full nitrogen

Flowering is in the milk：When flowering refers to the crop flowers such as water rice ﹑ little Mai ﹑ sorghums, column cap stretches out, pollen flight；Grouting is photosynthetic work Intraseminal process is stored in by assimilation with the starch of generation and the protein of conversion.

More specific description is made to present disclosure below.

A kind of high yield naked oats cultural method, comprises the following steps：

S1. selection of land site preparation：Stubble is the soil of pulse family or potato before selection, and tilling depth is more than 20cm, ploughed every mu during early autumn Paving applies farm manure more than 5000 kilograms, and Measures on Soil Moisture Conservation need to be taken during early spring；

S2. variety selection：Naked oats kind is selected according to the fertility in soil；

S3. seed treatment：Debris in the seed chosen in S2 is rejected, seed purity is reached more than 96%, cleanliness reaches More than 98%, germination percentage reaches more than 90%, selects calm fine day to bask seeds 3 ~ 4 days, and sowing is preceding to use the double seed dressings of seed dressing, and usage amount is to plant The 0.3% of sub- weight；

S4. the sowing time is determined：Sowing time is 20 ~ June 4 May；

S5. application rate is determined：Every mu is sowed 25 ~ 320,000 plants, and the every mu of amount of broadcasting is 9 ~ 10 kilograms；

S6. sow：Very little with 26 ~ 30cm of line-spacing, the sowing of depth 3 ~ 5cm little progress row after planting needs suppression in time；

S7. field management：Take weeding to the jointing stage after emerging, aphid prophylactic measures of going out；Take and chase after to heading stage after jointing Fertilizer, preventing and treating mythimna separata measure；After neat fringe foliage top dressing measure is taken to the maturity period.

Because continuous cropping can increase the incidence of disease of naked oats field pest and disease damage, weeds spread, so in above step S1, choosing Stubble is the soil of pulse family or potato before selecting, and preceding stubble is the soil content of organic matter height of pulse family or potato, and nutrient enriches, soil Short texture, is particularly suitable for the cultivation of naked oats.Ploughed at early autumn, every mu of paving applies farm manure more than 5000 kilograms, to early spring When, it is necessary to take the Measures on Soil Moisture Conservation such as pressure, rake, a kind of farm tools, whole in time according to soil moisture and climatic condition.

Because whether the high yield for planting naked oats with the germination percentage of naked oats has very big contact, therefore peasant household oneself is being broadcast Test germination percentage is also very important before kind.Meet described in step S3, finely chosen seeds before broadcasting, rejected not plump thin, broken Particle and debris, make seed purity reach more than 96%, cleanliness reaches more than 98%, and germination percentage reaches more than 90%, and is basked seeds With the double seed dressings of seed dressing, smut can not only be prevented, be more conducive to improve naked oats yield.

Because the seedling of naked oats will sustain damage less than in -5 degree, influence development, therefore select 20 ~ June of May Sowed within 4th, proper temperature, naked oats can just enter the pustulation period when temperature does not include too high, be conducive to volume increase.

Broadcast and sowed with machine sowing, 26 ~ 30cm of line-spacing, 3 ~ 5cm of depth using plough during sowing, after planting need timely town Pressure, is conducive to the growth of naked oats.

The soil selected in step S1 meets following index：In soil containing full nitrogen more than 0.15%, instant nitrogenousfertilizer 80PPm with Upper, more than rapid available phosphorus 20PPm, pH value 7-8, are conducive to further lifting naked oats yield.

The standard of variety selection is in step S2, and the naked oats kind of the soil selection plantation of medium fertility is dam oats 1 Or white swallow No. 2, high fertility soil, Po Liang cool area and irrigated land selection plantation naked oats kind for power resistant to lodging it is strong, increase Produce potentiality big Ji oats 2.

In step S4, when oats No. 1 naked oats in dam is planted in two cloudy beaches and slope beam, broadcast 20~May 25 May Kind, No. 2 naked oatses of Bai Yan are sowed in 25~June 4 May, Ji No. 2 naked oatses of oats water and the slope beam area that cools plant When, sowed 20~May 25 May.

Wherein, No. 2 naked oatses of Bai Yan should be postponed 5 days or so in the plantation of sandy and preceding Mountain area than other soils, Sowed 30 ~ June 4 May, other soils are sowed 25 ~ May 30 May.

In step S5, plantation soil be nonirrigated farmland when, every mu sow 25 ~ 300,000 plants, plantation soil be water when, every mu sowing 30 ~ 320,000 plants.

1 year autumn did not spread on soil apply farm manure in the case of, spring, every mu of soil need to add 2000 kilograms of farmers' Fertilizer, every mu of soil also needs to add 30 ~ 50 kilograms of calcium superphosphate or the ammonium of 3.5 ~ 5 kg of phosphoric acid two as base manure.

Weeding measure described in step S7 is implemented twice altogether, when growing to three leaves wholeheartedly for the first time for wheat seeding, accomplish thin hoe, Weed eradication, seedling is not buried, when growing to five leaves wholeheartedly for wheat seeding second, accomplish deep hoe（3~5cm）, pull out big grass, nurturing staff；May The last ten-days period~early June is that the phase occurs for aphid, and the strain of wheatland aphid is when reaching 50%, using the decis or 40% pleasure of 800 times of liquid Really 600 times of liquid sprays are controlled, and every mu sprays 40 kilograms of decoction.Rain can be taken advantage of in tillering stage to jointing stage to topdress once, mu chases after urea 12.5 Kilogram, it is desirable to accomplish to spread fertilizer over the fields uniform.

In step S7, when there is fertilizer deficiency phenomenon into heading stage after the jointing, take advantage of rain and topdress 1 time, every mu of paving applies urine 10 kilograms of element；When the opportunity of the preventing and treating sticking reaches more than 80% for wheatland mythimna separata egg hatching rate, using 50% ddvp emulsion 800~1000 times of liquid sprays are controlled, and every mu sprays 40~50 kilograms of decoction.

In step S7, the time of the foliage top dressing material is the flowering pustulation period, and every mu uses 100 grams of potassium dihydrogen phosphate, plus 50~70 kilograms of water, sprays after at 5 points in selection fine day afternoon or when the cloudy day is without rain, improves setting percentage with profit, increase mass of 1000 kernel.

When naked oats tassel is hardened by green flavescence, middle part seed, show to be harvested during kind seed color and luster.With reference to receipts Obtain field fringe to be carried out and be elected to be and reserved seed for planting for the coming year.

The technique effect of the present invention will be illustrated by specific embodiment below, following examples are in the course of cultivation Operated in strict accordance with method of the present invention.

Embodiment one

Carried out in the 10 mu of irrigated lands in Cha Youzhong flags Technology Bureau agricultural demonstration zone dam oats 1, No. 2 Ningyou No.1s of Bai Yan, determine oats 9, 4 comparative variety trials, are produced by surveying.510 jin of the per mu yield of dam oats 1,502 jin of the per mu yields of Bai Yan 2.Ningyou No.1, determine No. 9 mus of oats Production is respectively 420 jin, 440 jin.

Specific cultivation is as follows：

Stubble is potato before soil, containing full nitrogen more than 0.15%, more than instant nitrogenousfertilizer 80PPm, rapid available phosphorus more than 20PPm, pH value 7- 8。

No. 15 deep ploughing 23cm of September, every mu of paving applies 5500 kilograms of farm manure, and period in early spring is according to soil moisture and climatic condition Take the Measures on Soil Moisture Conservation such as pressure, rake, a kind of farm tools, whole in time.

Seed is finely chosen seeds before broadcasting, the not plump thin, broken kernel of rejecting and debris, after measured, seed purity reach 96% with On, cleanliness reaches more than 98%, and germination percentage reaches more than 90%.Calm fine day is selected to bask seeds 3 days.With the double seed dressings of seed dressing before sowing, Dose is the 0.3% of seed weight.

It is May 26 and totally two days May 27 to sow day.

The amount of broadcasting is every mu of 280,000 plants, 9 kilograms of seedling number.

Sow line-spacing 30cm, seed level 5cm.

After emerging~field management of jointing stage is as follows：

Tillage and weeding：Three leaves are wholeheartedly hoed up weeds for the first time, accomplished thin hoe, weed eradication, are not buried seedling；Five leaves are wholeheartedly hoed up weeds for the second time, deep hoe 5cm, takes out big grass.

Go out aphid diseases prevention：Late May wheatland aphid strain rate reaches 50%, is controlled with the decis spray of 800 times of liquid, mu sprays decoction 40 kilograms.

Rain is taken advantage of in tillering stage to jointing stage to topdress once, mu chases after 12.5 kilograms of urea.

After jointing~field management at heading stage is as follows：

There is fertilizer deficiency phenomenon, take advantage of rain and topdress once, mu chases after 10 kilograms of urea.

Measure wheatland armyworm egg hatching rate and reach 80%, when every square metre of larva amount reaches 15, use 50% ddvp emulsion The spraying preventing and treating of 800~1000 times of liquid, 45 kilograms of decoction of mu.

The field management in Qi Suihou~maturity period is as follows：

Carry out foliage top dressing 1 time in the flowering pustulation period, 100 grams of potassium dihydrogen phosphate of mu adds water 60 kilograms, selection is in fine day afternoon 6 points are sprayed.

When naked oats tassel is hardened by green flavescence, middle part seed, show to be harvested during kind seed color and luster.

Embodiment two

Dam oats 1, Bai Yan 2 are carried out in 130 mu of the natural village Wang Zhong peasant households in Cha You Hou Qi great Tan townshiies great Xi slopes administrative village three nonirrigated farmland Number, dam oats 13, No. 13 5 comparative variety trials of dam oats No. 14, swallow demonstration, pass through and survey production " Bai Yan 2 " yield highest mu 380 jin of yield, " dam oats 8 " 310 jin of per mu yield, are again " dam oats 13 " 290 jin of per mu yield.

Specific cultivation is before soil that stubble is mung bean with the difference of embodiment one, and sowing day is May 28 and May Two days on the 29th, the amount of broadcasting was every mu of 290,000 plants of seedling number, 9 kilograms, sows line-spacing 27cm, seed level 5cm.

Embodiment three

The white swallow No. 2 in 10 mu of irrigated lands is carried out in the people live in plenty Seed company Zhong Qi bases institute, oats No. 9, swallow No. 13, Ningyou No.1 is determined With the comparative variety of grade 5 of dam oats 8, No. 2 per mu yields of Bai Yan reach 540 jin, and other kind per mu yields are not up to 500 jin.

Specific cultivation is before soil that stubble is broad bean with the difference of embodiment one, and time of site preparation is September 25, and Do not spread in the fall and apply farm manure.Second Year added 2000 kilograms of high-quality farm manures April 15, plus 40 kilograms of calcium superphosphate make base manure Ditch spread.It is May 25 and two days Mays 26 day to sow day.Early June wheatland aphid strain rate reaches 50%, with 40% 600 times of liquid of Rogor Spray is controlled spray and controlled, and mu sprays 40 kilograms of decoction.

Example IV

The people live in plenty 5300 mu of Seed company Zhuozi County base irrigated land naked oats yielding Demonstration piece 4, experiment kind have dam oats 1, White swallow No. 2, swallow No. 13, Ningyou No.1, determine 430 jin of the per mu yield average out to of oats 9.Wherein dam oats 1, No. 2 per mu yields of Bai Yan are divided 520 jin, 530 jin are not reached, and other kind per mu yields are 430 or so.

Specific cultivation is before soil that stubble is potato with the difference of embodiment three, and time of site preparation is October 10 Day, and do not spread apply farm manure in the fall.Second Year added 2000 kilograms of high-quality farm manures April 10, and added the ammonium of 4 kg of phosphoric acid two Do seed manure.

Embodiment five

Examining the big lama village of battalion in right Qian Qisaihan towns and the team of Pingquan town three 250 mu of nonirrigated farmlands " Bai Yan 2 " of development and " dam oats, No. 1 " Demonstration piece 2, measures 305 jin and 312 jin of " Bai Yan 2 " and " dam oats 8 " per mu yield.

Specific cultivation is that preceding stubble is vegetables with the difference of embodiment one, and time of site preparation is September 15, deep ploughing 22cm, every mu of paving applies 5300 kilograms of farm manure.The amount of broadcasting is every mu of 300,000 plants, 10 kilograms of seedling number.

Claims (10)

1. a kind of high yield naked oats cultural method, it is characterised in that comprise the following steps：

S1. selection of land site preparation：Stubble is the soil of pulse family or potato before selection, and tilling depth is more than 20cm, ploughed every mu during early autumn Paving applies farm manure more than 5000 kilograms, and Measures on Soil Moisture Conservation need to be taken during early spring；

S2. variety selection：Naked oats kind is selected according to the fertility in soil；

S3. seed treatment：Debris in the seed chosen in S2 is rejected, seed purity is reached more than 96%, cleanliness reaches More than 98%, germination percentage reaches more than 90%, selects calm fine day to bask seeds 3 ~ 4 days, and sowing is preceding to use the double seed dressings of seed dressing, and usage amount is to plant The 0.3% of sub- weight；

S4. the sowing time is determined：Sowing time is 20 ~ June 4 May；

S5. application rate is determined：Every mu is sowed 25 ~ 320,000 plants, and the every mu of amount of broadcasting is 9 ~ 10 kilograms；

S6. sow：With 26 ~ 30cm of line-spacing, 3 ~ 5cm of depth is sowed, and after planting needs suppression in time；

S7. field management：Take weeding to the jointing stage after emerging, aphid prophylactic measures of going out；Take and chase after to heading stage after jointing Fertilizer, preventing and treating mythimna separata measure；After neat fringe foliage top dressing measure is taken to the maturity period.

2. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that the soil in step S1 is also Meet following index：Contain full nitrogen more than 0.15%, more than instant nitrogenousfertilizer 80PPm, rapid available phosphorus more than 20PPm, pH value 7-8 in soil.

3. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that variety selection in step S2 Standard be that the naked oats kind of the soil of medium fertility selection plantation is dam oats 1 or white swallow No. 2, high fertility soil, Po Liang The naked oats kind that the regional and irrigated land selection that cools is planted opens oats 2 for Ji.

4. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that in step S4, dam oats 1 When naked oats is planted in two cloudy beaches and slope beam, sowed 20~May 25 May, No. 2 naked oatses of Bai Yan are in May 25 ~June 4 was sowed, Ji No. 2 naked oatses of oats water and slope beam cool area's plantation when, carried out 20~May 25 May Sowing.

5. a kind of high yield naked oats cultural method according to claim 4, it is characterised in that No. 2 naked oatses of Bai Yan exist When being planted with preceding Mountain area sandyly, sowed 30 ~ June 4 May, other soils are broadcast 25 ~ May 30 May Kind.

6. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that in step S5, planting soil Ground be nonirrigated farmland when, every mu sow 25 ~ 300,000 plants, plantation soil be water when, every mu sow 30 ~ 320,000 plants.

7. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that 1 year autumn on soil Do not spread in the case of applying farm manure, spring, every mu of soil need to add 2000 kilograms of farm manures, and every mu of soil also needs to add 30 ~ 50 public affairs Jin calcium superphosphate or the ammonium of 3.5 ~ 5 kg of phosphoric acid two.

8. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that weeding described in step S7 Measure is implemented twice altogether, when growing to three leaves wholeheartedly for the first time for wheat seeding, when growing to five leaves wholeheartedly for the second time for wheat seeding；It is described When aphid prophylactic measures of going out action opportunity is that the strain of wheatland aphid reaches 50%, using the decis or 40% Rogor 600 of 800 times of liquid The spray of times liquid is controlled, and every mu sprays 40 kilograms of decoction.

9. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that in step S7, described When there is fertilizer deficiency phenomenon into heading stage after jointing, take advantage of rain and topdress 1 time, every mu of paving applies 10 kilograms of urea；The preventing and treating sticking When opportunity is that wheatland mythimna separata egg hatching rate reaches more than 80%, controlled using 50% ddvp emulsion, 800~1000 times of liquid sprays, every mu of spray 40~50 kilograms of dispenser liquid.

10. a kind of high yield naked oats cultural method according to claim 1, it is characterised in that in step S7, described The time of the outer material that topdresses is the flowering pustulation period, and every mu uses 100 grams of potassium dihydrogen phosphate, adds water 50~70 kilograms, under selection fine day Sprayed after 5 points of noon or when the cloudy day is without rain.