CN114009435A - Flower thinning agent for apple trees and preparation method thereof - Google Patents

Flower thinning agent for apple trees and preparation method thereof Download PDF

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CN114009435A
CN114009435A CN202111441502.4A CN202111441502A CN114009435A CN 114009435 A CN114009435 A CN 114009435A CN 202111441502 A CN202111441502 A CN 202111441502A CN 114009435 A CN114009435 A CN 114009435A
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flower thinning
thinning agent
starch
flower
calcium formate
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CN114009435B (en
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徐记迪
王钤莹
邹养军
马锋旺
管清美
闫金姣
崔光鑫
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Northwest A&F University
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/02Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00Botany in general
    • A01G7/06Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants

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Abstract

The invention discloses a flower thinning agent for apple trees and a preparation method thereof, belonging to the technical field of flower thinning and fruit thinning of apples.

Description

Flower thinning agent for apple trees and preparation method thereof
Technical Field
The invention relates to the technical field of flower and fruit thinning of apple trees, in particular to a flower thinning agent for apple trees and a preparation method thereof.
Background
The reasonable loading capacity is ensured by thinning flowers and fruits in the apple flower and fruit management, the relationship between growth and fruit is adjusted, the occurrence in large and small years is prevented, the fruit commodity rate is improved, and the income is increased. Traditional flower thinning relies on the manual work to go on, needs a large amount of labours, adopts chemical reagent to thin flower thinning fruit mostly at present, has not only shortened labour time but also can reduction in production cost. Since flower induction occurs simultaneously with strong cell division and initial fruit growth, chemical thinning removes excess flowers and fruits by spraying chemical agents to fruit trees, regulates plant productivity, and thus prevents reduction of fruit size and deterioration of fruit quality due to competition for nutrients among fruits. Mechanical flower thinning and fruit thinning are relatively new technologies, can be used for directly removing redundant flowers and fruits, but are not high in accuracy and can cause mechanical damage to trees, and are currently and rarely applied in China. In foreign orchards, proper chemical flower thinning and fruit thinning are required every year to achieve rationality in terms of flower number, fruit size, fruit quality, fruit tip ratio and prevention of alternate fruit set. At present, chemical flower and fruit thinning is taken as a research focus in China, spraying is carried out according to different chemical reagents at different periods after fruit trees bloom, a proper medicament and a proper spraying period are determined by utilizing load capacity, and technical guidance is provided for production practice.
The flower thinning agents commonly used at present are: dinitrocresol, lime sulfur mixture and calcium chloride, wherein the fruit thinning agent comprises: the method comprises the steps of spraying metamitron, NAA and the like on the whole tree for the first time in the initial stage of full bloom, spraying for the second time after 2-3 days, spraying for the first time when the diameter of a central fruit in the young fruit period is about 0.6cm, and spraying for the second time when the diameter of the central fruit in the young fruit period is about 1 cm. However, the flower and fruit thinning agents commonly used at present have more or less problems. Rainfall in the flowering period and high air humidity, the use of dinitrocresol can cause chemical injury to trees, and dinitrocresol contains heavy metal and can pollute the ecological environment of an orchard. When the lime sulphur is used for thinning flowers, the flowering phase needs to be familiar, an appropriate spraying time node needs to be determined, some spraying devices with iron products can be rusted by the lime sulphur to influence the use of mechanical equipment, and meanwhile, the odor of the lime sulphur can disperse bees to influence the pollination quality of an orchard. Calcium chloride is unstable in effect, has serious phytotoxicity on growing points and young leaves, and is not suitable for direct use. After the flower thinning agent NAA is used, the effect is unstable, leaves grow upwards, dwarfism fruits and the like are sometimes generated, and the over thinning can be caused when the metamitron is used in rainfall. Therefore, a pure natural and pollution-free chemical flower thinning agent is urgently needed at present, the operation is simple, only one-time spraying is needed, and the agent is rain-proof and frost-proof and is not afraid of being in a rainy season in the flowering period.
Disclosure of Invention
In view of the above, the present invention provides a flower thinning agent for apple trees and a preparation method thereof, which solves the problems that the flower thinning agent is unstable in effect and can not be used in rainy days, chemical injury is caused to trees when water flows to trees, pollution is caused when water flows to soil, and multiple spraying is required.
The invention solves the technical problems by the following technical means:
a flower thinning agent for apple trees comprises calcium formate as a main component.
Further, the flower thinning agent also comprises diatom powder, peach gum, starch, hydroxyethyl-beta-cyclodextrin, sodium hyaluronate, beeswax, borax, sodium hydroxide and potassium permanganate.
Further, the starch is cereal starch, such as corn starch, wheat starch, etc.
Further, the mass ratio of the starch to the calcium formate is 1: (0.4-0.6).
Further, the mass ratio of the starch to the hydroxyethyl-beta-cyclodextrin is (1-2): 0.1.
further, the sodium hydroxide, the potassium permanganate and the borax need to be prepared into solutions for use, and the concentrations are respectively 30%, 5% and 5%.
Further, the mass ratio of the sodium hydroxide solution to the starch is as follows: 0.225: 1, the mass ratio of the potassium permanganate solution to the starch is as follows: 0.01: 1, the mass ratio of the borax solution to the starch is as follows: 0.02: 1.
of course, when the flower thinning agent is actually prepared, the sodium hydroxide, the potassium permanganate and the borax can also be directly used as high-concentration solutions, and water is added for dilution when the high-concentration solutions are used.
Further, the mass ratio of the sodium hyaluronate to the calcium formate is 0.6: 1.
further, the mass ratio of the diatom powder to the calcium formate is 0.05: 1.
further, the mass ratio of the starch to the peach gum is 1: 0.2, the mass ratio of starch to bee wax is 1: 0.02.
the invention also discloses a preparation method of the flower thinning agent for apple trees, which comprises the following steps:
(1) decocting clean peach gum in water for 60-120min, cooling, filtering to obtain filtrate, adding sodium hyaluronate and calcium formate into the filtrate, and stirring to obtain calcium formate gel;
(2) mixing hydroxyethyl-beta-cyclodextrin with starch to obtain mixed starch for later use;
(3) adding 1/2 mass of mixed starch into 30% sodium hydroxide solution, heating to 35-45 ℃, stirring uniformly, adding 5% potassium permanganate with the concentration, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate gel, diatom powder and water, heating to 40-45 ℃, stirring uniformly, adding beeswax when the mixture is hot, and stirring uniformly to obtain the flower thinning agent.
Further, the water adding amount is 9-10 times of the total mass of the starch and hydroxyethyl-beta-cyclodextrin mixed starch.
Further, the flower thinning agent is mixed with water for dilution, and the water addition amount is 1L of water per 0.5-50g of calcium formate. The prepared flower thinning agent is in a sticky state and is mixed with water to be dispersed into suspension, and the specific water addition amount is based on the flower thinning amount in the current year.
Further, the flower thinning agent is sprayed when the central flower of the apple blooms more than or equal to 50%. The spraying time is not limited by rainy days or windy days.
Has the advantages that: the flower thinning agent prepared by the invention has good and stable flower thinning effect, the flower thinning rate can reach 75.6%, the apple can be effectively thinned, and simultaneously, the higher single fruit number and fruit setting rate can be ensured, thus being beneficial to the expansion of planting industry of growers and the improvement of economic benefit. The spraying time of the prepared flower thinning agent is not influenced by weather, the flower thinning agent can be used in rainy days, the spraying frequency is only one time, the operation is simple, and manpower and material resources are saved.
Drawings
FIG. 1: an actual thinning effect graph of the apples sprayed with the thinning agent of the embodiment 1 is adopted;
FIG. 2: and (4) adopting clear water to control the actual thinning effect picture of the sprayed apples.
Detailed Description
The present invention will be described in detail with reference to specific examples below:
example 1: preparation of flower thinning agent
Weighing the following raw materials in parts by weight:
0.4kg of calcium formate, 0.02kg of diatom powder, 0.2kg of peach gum, 1kg of wheat starch, 0.1kg of hydroxyethyl-beta-cyclodextrin, 0.24kg of sodium hyaluronate, 0.02kg of beeswax, 0.02kg of 5% borax, 0.225kg of 30% sodium hydroxide and 0.01kg of 5% potassium permanganate.
The preparation method comprises the following steps:
(1) cleaning peach gum, adding 3L of water, decocting for 60min, keeping slightly boiling in the decocting process, cooling and filtering after the decocting is finished, removing peach gum to obtain filtrate, adding sodium hyaluronate and calcium formate into the filtrate, stirring uniformly, and standing for a period of time to obtain calcium formate gel for later use;
(2) mixing hydroxyethyl-beta-cyclodextrin with starch to obtain mixed starch for later use;
(3) adding 1/2 mass of mixed starch into 30% sodium hydroxide solution, heating to 40 ℃ after stirring uniformly, adding 5% potassium permanganate with concentration, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate gel, diatom powder and 9 times of water of the total mass of the mixed starch, heating to 45 ℃, continuing stirring, adding beeswax when hot, and stirring for about 20min to completely and uniformly mix to obtain the flower thinning agent.
The flower thinning agent prepared after cooling is mixed with 50g of calcium formate and 1L of water for use, 8L of water can be added for water dispersion in the embodiment to obtain the diluted flower thinning agent, and the diluted flower thinning agent can be sprayed on the whole tree for use by a small-sized sprayer.
Example 2: preparation of flower thinning agent
Weighing the following raw materials in parts by weight:
200g of calcium formate, 10g of diatom powder, 100g of peach gum, 500g of corn starch, 50g of hydroxyethyl-beta-cyclodextrin, 120g of sodium hyaluronate, 10g of beeswax, 10g of 5% borax, 112.5g of 30% sodium hydroxide and 5g of 5% potassium permanganate.
The preparation method comprises the following steps:
(1) cleaning peach gum, adding 1L of water, decocting for 120min, keeping slightly boiling in the decocting process, cooling and filtering after the decocting is finished, removing peach gum to obtain filtrate, adding sodium hyaluronate and calcium formate into the filtrate, stirring uniformly, and standing for a period of time to obtain calcium formate gel for later use;
(2) mixing hydroxyethyl-beta-cyclodextrin with starch to obtain mixed starch for later use;
(3) adding 1/2 mass of mixed starch into 30% sodium hydroxide solution, stirring uniformly, heating to 40 ℃, adding 5% potassium permanganate with concentration, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate gel, diatom powder and 10 times of water of the total mass of the mixed starch, heating to 45 ℃, stirring continuously, adding beeswax when hot, and stirring for about 20min to completely mix the materials.
Example 3: preparation of flower thinning agent
Weighing the following raw materials in parts by weight:
480g of calcium formate, 24g of diatom powder, 160g of peach gum, 800g of corn starch, 40g of hydroxyethyl-beta-cyclodextrin, 288g of sodium hyaluronate, 16g of beeswax, 16g of 5% of borax, 180g of 30% of sodium hydroxide and 8g of 5% of potassium permanganate.
The preparation method comprises the following steps:
(1) cleaning peach gum, adding 1L of water, decocting for 120min, keeping slightly boiling in the decocting process, cooling and filtering after the decocting is finished, removing peach gum to obtain filtrate, adding sodium hyaluronate and calcium formate into the filtrate, stirring uniformly, and standing for a period of time to obtain calcium formate gel for later use;
(2) mixing hydroxyethyl-beta-cyclodextrin with starch to obtain mixed starch for later use;
(3) adding 1/2 mass of mixed starch into 30% sodium hydroxide solution, stirring uniformly, heating to 40 ℃, adding 5% potassium permanganate with concentration, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate gel, diatom powder and 10 times of water of the total mass of the mixed starch, heating to 45 ℃, stirring continuously, adding beeswax when hot, and stirring for about 20min to completely mix the materials.
Experiment 1:
the experiment is carried out in the test station of Shaanxi Luochuan apple in 2020, and the variety is Changfu No. two. 2019 and 2020 are warmer in winter, and enter the full bloom stage about 4 middle ten days in Luochuan area, so that the flower thinning experiment can be carried out.
The variety to be tested is Fuji, the tree age is 6 years, the vigor of the selected fruit tree is mediocre, the row spacing of the selected fruit tree is 4m multiplied by 5m, the height of the selected fruit tree is 2.5m, the crown width is 1.8m, grass grows between rows, and the field management measures are consistent.
Reagent: the flower thinning agent, lime sulphur, vegetable oil, wisdom flower prepared in example 1;
the 4 different flower thinning agents or fruit thinning agents are selected as experimental objects, and the influence of the different flower thinning agents or fruit thinning agents on the apple thinning effect is investigated.
Treatment and concentration:
and (3) processing I: the flower thinning agent prepared in the embodiment 1 is sprayed when the central flower of the apple blooms for 50%, and is only sprayed once, specifically, flower thinning is carried out in 19 days in 4 months, and the weather is as follows: light rain.
And (4) treatment II: the lime sulphur is sprayed for the first time when the lime sulphur is 0.5 Baume degree and the central flowers of the plants are about 75% open, and is sprayed for the second time after 2 days. Particularly, flower thinning is carried out on 21 days after 4 months, and the weather is as follows: cloudy.
Treatment III: 5% olive oil, 20% of the flowers of the whole tree were sprayed 2 times continuously on days 2 and 4 when they were opened. Particularly, flower thinning is carried out on 15 days in 4 months, and the weather is as follows: cloudy.
And (4) treatment IV: 5 percent of the flower is good for intelligence, about 30 percent of the whole tree flower is sprayed for the first time, and 75 percent of the whole tree flower is sprayed for the second time. In particular, flower thinning is carried out on 17 days in 4 months, and the weather is as follows: cloudy.
And (5) treatment V: 5g/L calcium formate soluble agent, and a flower thinning agent is sprayed when the central flower of the apple blooms about 50%, and is sprayed for the first time and the second time when the whole tree blooms about 80%. Particularly, flower thinning is carried out on 18 days in 4 months, and the weather is as follows: and (4) yin.
All treatments were performed in single plots, repeated three times, and the entire tree was carefully sprayed with a small sprayer, and the control was sprayed with clear water.
The results obtained are shown in table 1:
Figure BDA0003383578560000061
as can be seen from Table 1, all the treatments of example 1, lime sulphur, olive oil, Zhishuyou flower and calcium formate have a certain thinning effect on the Changfu No. two apples and are better than the control treatment, but the thinning effect is obviously different among the treatments.
After the flowers are treated by the method in example 1, the fruit setting rate of inflorescences is lower than that of other treatment values, namely 63.4%, 65.3% and 60.2%; however, the air table rates of the Zhishuyouhua and the calcium formate are higher than other treatment values, namely 36.4 percent and 40.0 percent respectively, and only 10.7 percent is obtained in example 1; the treatments with lower fruit setting rate of flowers among the treatments are calcium formate and lime sulphur and the treatment of example 1, which are respectively 30.0 percent, 32.6 percent and 24.4 percent; the treatments with higher single fruit rate among the treatments are calcium formate treatment and Zhishuyou flower treatment, which are 47.1 percent and 46.9 percent respectively. Compared with the control treatment, calcium formate has certain thinning effect in comprehensive view of the indexes of the flower fruit setting rate, the inflorescence fruit setting rate, the single-fruit inflorescence proportion and the like, but compared with the calcium formate treatment in example 1, the calcium formate treatment finds that the inflorescence fruit setting rate and the flower fruit setting rate in example 1 are lower than those of the calcium formate treatment, the single-fruit inflorescence proportion and the higher level thinning rate have the same level as those of the calcium formate treatment, and the result of example 1 is remarkable in thinning effect and few flowers which do not bear fruits are remained.
Experiment 2:
the above experiment is directed to the comparison of the effect of example 1 with the prior art flower thinning agent, and in addition, a comparative example was prepared for comparison.
The specific proportion and the preparation method of the comparative example are as follows:
comparative example 1:
raw materials: 0.4kg of calcium formate, 0.2kg of peach gum, 0.24kg of sodium hyaluronate and 0.02kg of bee wax.
Preparation: cleaning peach gum, adding 3L of water, decocting for 60min, keeping slightly boiling in the decocting process, cooling and filtering after the decocting is finished, removing peach gum to obtain filtrate, adding sodium hyaluronate, calcium formate and melted bee wax into the filtrate, uniformly stirring, standing for a period of time, and adding water with the mass of 10 times of calcium formate to obtain the flower thinning agent 1.
Comparative example 2:
raw materials: 0.4kg of calcium formate, 1kg of wheat starch, 0.1kg of hydroxyethyl-beta-cyclodextrin, 0.02kg of 5% of borax, 0.225kg of 30% of sodium hydroxide and 0.01kg of 5% of potassium permanganate.
Preparation: mixing hydroxyethyl-beta-cyclodextrin with starch to obtain mixed starch; adding 1/2 mass of mixed starch into 30% sodium hydroxide solution, stirring uniformly, heating to 40 ℃, adding 5% potassium permanganate, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate and 9 times of water of the total mass of the mixed starch, heating to 45 ℃, and stirring uniformly to obtain the flower thinning agent.
Comparative example 3:
raw materials: 0.4kg of calcium formate, 1kg of wheat starch, 0.02kg of beeswax, 0.02kg of 5% borax, 0.225kg of 30% sodium hydroxide and 0.01kg of 5% potassium permanganate.
Preparation: adding 1/2 mass of starch into 30% sodium hydroxide solution, stirring uniformly, heating to 40 ℃, adding 5% potassium permanganate with the concentration, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate and 9 times of water of the total mass of the mixed starch, heating to 45 ℃, continuing stirring, adding beeswax while hot, and stirring for about 20min to completely and uniformly mix to obtain the flower thinning agent.
The flower-thinning agent prepared in comparative examples 1-3 was still used by mixing 50g of calcium formate with 1L of water, and 8L of water was added to disperse the mixture to obtain a diluted flower-thinning agent, which was sprayed on the whole tree using a small sprayer. The specific experimental method and spraying time are the same as those of experiment 1 treatment I.
The results obtained are shown in table 2:
Figure BDA0003383578560000081
from the results shown in table 2, it is understood that the removal rates of comparative examples 1 to 3 are all lower than that of example 1, and lower than the two-time spraying effect of the calcium formate soluble agent, so the effect of the flower thinning agent prepared by the preparation methods of comparative examples 1 to 3 is poor. The flower thinning agent of the comparative example 1 is prepared by mixing calcium formate with peach gum, sodium hyaluronate and bee wax, and although the effective component calcium formate can achieve the flower thinning effect, the flower thinning agent of the comparative example 1 has poor viscosity and cannot be attached to apple flowers, and the effective component is partially lost through rainwater or dew washing, so that the flower thinning effect is reduced. The flower thinning agent in the comparative example 2 is prepared from calcium formate, starch, hydroxyethyl-beta-cyclodextrin, beeswax, borax and the like, and has a poor flower thinning effect, and the flower thinning rate only reaches 59.7%, because the flower thinning agent prepared in the comparative example 2 wraps the calcium formate too tightly, the calcium formate cannot be released well to act on stigmas, and the flower thinning rate is low. The flower thinning agent of the comparative example 3 is prepared by adopting calcium formate, starch, beeswax, borax and other raw materials, the flower thinning rate reaches 84.8%, and the flower thinning rate is too high, because the viscosity of the flower thinning agent is too high and is adhered to apple flowers for a long time, the head of the apple flowers is burnt too much, the flower thinning rate is too high, and the too high flower thinning rate does not accord with the economic benefit of the apple planting industry.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.

Claims (9)

1. The flower thinning agent for apple trees is characterized in that the main component of the flower thinning agent is calcium formate.
2. The flower thinning agent for apple trees according to claim 1, wherein the flower thinning agent further comprises diatom powder, peach gum, starch, hydroxyethyl-beta-cyclodextrin, sodium hyaluronate, beeswax, borax, sodium hydroxide, potassium permanganate.
3. The flower thinning agent for apple trees according to claim 2, wherein the mass ratio of starch to calcium formate is 1: (0.4-0.6).
4. The flower thinning agent for apple trees according to claim 3, wherein the mass ratio of starch to hydroxyethyl-beta-cyclodextrin is (1-2): 0.1.
5. the flower thinning agent for apple trees according to claim 4, wherein the sodium hydroxide, the potassium permanganate and the borax are prepared into solutions with the concentrations of 30%, 5% and 5%, respectively, and the mass ratio of the sodium hydroxide solution to the starch is as follows: 0.225: 1, the mass ratio of the potassium permanganate solution to the starch is as follows: 0.01: 1, the mass ratio of the borax solution to the starch is as follows: 0.02: 1.
6. the flower thinning agent for apple trees according to claim 5, wherein the mass ratio of sodium hyaluronate to calcium formate is 0.6: 1.
7. the preparation method of the flower thinning agent for apple trees according to claim 6, wherein the preparation method of the flower thinning agent is as follows:
(1) decocting clean peach gum in water for 60-120min, cooling, filtering to obtain filtrate, adding sodium hyaluronate and calcium formate into the filtrate, and stirring to obtain calcium formate gel;
(2) mixing hydroxyethyl-beta-cyclodextrin with starch to obtain mixed starch for later use;
(3) adding 1/2 mass of mixed starch into 30% sodium hydroxide solution, heating to 35-45 ℃, stirring uniformly, adding 5% potassium permanganate with the concentration, stirring uniformly, adding the rest mixed starch, 5% borax solution, calcium formate gel, diatom powder and water, heating to 40-45 ℃, stirring uniformly, adding beeswax when the mixture is hot, and stirring uniformly to obtain the flower thinning agent.
8. The method of claim 7, wherein the flower thinning agent is mixed with water in an amount of 1L per 0.5-50g calcium formate.
9. The flower thinning agent for apple trees according to claim 8, wherein the flower thinning agent is sprayed when the central flower of an apple is more than or equal to 50% bloomed.
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US20100313620A1 (en) * 2006-11-14 2010-12-16 Lanxess Deutschland Gmbh Calcium formiate fertiliser
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CN115067100A (en) * 2022-06-29 2022-09-20 广西壮族自治区农业科学院 Citrus flower thinning and fruit retention device and citrus management method
CN115067100B (en) * 2022-06-29 2024-02-23 广西壮族自治区农业科学院 Method for managing oranges by using orange flower thinning and fruit preserving device

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