CN110249835B

CN110249835B - Green and labor-saving flower and fruit thinning method for Wo oranges

Info

Publication number: CN110249835B
Application number: CN201910626971.XA
Authority: CN
Inventors: 洪林; 杨蕾; 李勋兰; 魏召新; 彭芳芳; 程籍; 戴建修; 王振兴
Original assignee: Chongqing Academy of Agricultural Sciences
Current assignee: Chongqing Academy of Agricultural Sciences
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2021-11-19
Anticipated expiration: 2039-07-12
Also published as: CN110249835A

Abstract

The invention belongs to the technical field of fruit tree cultivation, and discloses a green labor-saving flower and fruit thinning method for citrus reticulata.o.f.A flower thinning agent is sprayed 2 days before the full-bloom period of citrus reticulata.o.f.m.; and/or spraying a fruit thinning agent 1-2 days after the flowers are withered by the Or; wherein the flower thinning agent is sodium rosinate or calcium formate; the fruit thinning agent is sodium rosinate or naphthylacetic acid. The invention adopts a chemical flower and fruit thinning method to replace manual flower and fruit thinning to regulate and control the yield of the Or, reasonably reduces the fruit setting rate of the Or, reduces the task amount of manual fruit thinning, and greatly reduces the fruit thinning cost. The invention can not only meet the normal growth of the citrus trees, reduce unnecessary loss of nutrients of the trees, prevent the occurrence of the phenomenon of big and small years, but also control the yield, stabilize the yield, improve the fruit quality and increase the comprehensive income of the orchard.

Description

Green and labor-saving flower and fruit thinning method for Wo oranges

Technical Field

The invention belongs to the technical field of fruit tree cultivation, and particularly relates to a green labor-saving flower and fruit thinning method for citrus reticulata.

Background

The orange is one of the main fruit tree varieties in the world, 135 countries and regions produce the orange globally, more than 40 countries mainly produce the orange, and the world trades annuallyThe amount exceeds 65 × 10⁸Dollars, the third largest trade agricultural product. The latest statistical data shows that China, India and Morocco are countries with the fastest growing citrus planting area in recent years, the citrus industry becomes the regional economic development support industry in China, and the citrus cultivation support industry plays an important supporting role in the implementation process of poverty alleviation and country happiness strategy of rural industry in China. With the relative surplus of the domestic medium-maturing oranges and the over-centralized marketing of products, the late-maturing oranges occupying the neutral gear are deeply pursued by the domestic market, the industrial layout of the production areas of oranges such as Guangxi, Chongqing and the like is gradually adjusted and optimized, and the improved varieties of the late-maturing oranges mainly based on the fertile oranges are greatly popularized.

In recent years, the development of the Or citrus is rapid, and the planting area exceeds 200 ten thousand mu. The newly developed Or production base part is put into production, but the cultivation technical link is obviously weak, the industry is developed vigorously, meanwhile, some key problems restricting the industry development are gradually exposed, the fruit carrying amount is too much, the fruit is small, the quality cannot reach the inherent level, the fruit carrying amount is overloaded, the phenomenon of fruit bearing in the big and small years is easy to occur, in order to improve the phenomenon of fruit bearing in the big and small years, manual flower thinning and fruit thinning are generally adopted, the efficiency is low, the cost is high, in recent years, alternate fruit bearing in every year is adopted, the orchard yield can be kept, the mechanization degree of most orchards is low, the trees are promoted to fruit in every year through repeated pruning, the yield recovery time is too long, and the manual consumption is large. The green ecological flower and fruit thinning agent is widely applied to fruit trees such as apples, pears, longans and the like, and the effect is good, but the action mechanism and the green safety of different kinds of flower and fruit thinning agents are different, and the technical research and the integrated application of the flower and fruit thinning agent on oranges are few.

However, the main problems of flower and fruit thinning of the conventional wogonin are as follows:

the method for manually thinning flowers and fruits has low efficiency, high cost and large labor consumption, and the time for recovering the yield is too long. At present, rural labor resources are in short supply, the phenomenon of aging population is extremely serious, and the cost of temporary hiring workers is continuously increased. Under the normal condition, only about 20 trees can be thinned out by one temporary worker every day, and late-maturing oranges such as wontons with excellent yield are usually thinned out for 5-6 times from 5-9 months in production, so that time and labor are wasted, and yield control measures cannot be timely and effectively implemented.

Meanwhile, the application of the flower and fruit thinning agent to oranges is still rare. The yield is the most important in the traditional idea of planting citrus, the fruit quality is often ignored, and the nutrient imbalance of trees, the weak tree vigor and even the dead trees are easily caused when the yield is pursued once, so that the people cannot pay attention to the loss. In recent years, with the change of the concept, more growers pay attention to the continuous stability of the orchard benefit, fruit thinning measures of late-maturing varieties such as citrus aurantium, spring harvest, unknown fire and the like become essential key links for orchard management, but currently, a manual fruit thinning mode is basically adopted. Traditional chemical flower and fruit thinning agents for fruit trees, such as lime sulphur, ferrous sulfate, calcium-containing compounds, edible oil and other chemical preparations, mainly cause damage to stigma, pollen, ovaries and other organs or tissues, so that the fruit setting rate is reduced, but various chemical reagents or formulas have the defects of general flower and fruit thinning effect, high toxicity or large damage range of plant tissues, and the effect is single, so that the chemical flower and fruit thinning agents are applied and popularized less in production, and are particularly applied to citrus yield control rarely.

Therefore, through a large amount of early-stage experimental investigation and data analysis, the types of novel chemical flower and fruit thinning medicaments are screened, the appropriate use time is determined, the medicament proportioning concentration is optimized, and the optimal flower and fruit thinning method for the Or is obtained. The method can reasonably reduce the fruit setting rate of the citrus fruit trees, reduce the task amount of manual fruit thinning, maintain proper yield, meet the normal growth of the citrus trees, reduce unnecessary nutrient loss of the citrus trees, improve the yield and the quality, and achieve the purposes of cost saving and efficiency improvement.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a green and labor-saving flower and fruit thinning method for citrus reticulata.

The invention is realized in such a way, and provides a green and labor-saving flower and fruit thinning method for citrus. According to the green and labor-saving flower and fruit thinning method for the Or citrus, the flower thinning agent or the fruit thinning agent is sprayed on the Or citrus through the appropriate type and the appropriate matching concentration of the novel chemical flower and fruit thinning agent and selecting an appropriate period.

The preparation method of the flower thinning agent comprises the following steps:

weighing a proper amount of sodium rosinate, adding tap water into the sodium rosinate to promote dissolution, and fully and uniformly mixing to obtain a first flower thinning agent sodium rosinate with the concentration of 3-18 g/L; weighing a proper amount of calcium formate and directly adding water, and taking a 15 kg/medicine spraying barrel to be mixed with 0.2 g-0.6 g of calcium formate medicine as a reference to obtain a second flower thinning agent calcium formate with the concentration of 10 mg/L-30 mg/L.

The preparation method of the fruit thinning agent comprises the following steps:

weighing a proper amount of sodium rosinate, adding tap water into the sodium rosinate to promote dissolution, and fully and uniformly mixing to obtain a first fruit thinning agent sodium rosinate with the concentration of 3-18 g/L; weighing appropriate amount of naphthylacetic acid (NAA), adding 0.02g of analytically pure granular NaOH and 10ml of water to promote dissolution, fully and uniformly mixing, and taking 150-450 mg of naphthylacetic acid as a reference by adding 15kg of naphthylacetic acid into a pesticide spraying barrel to obtain a second fruit thinning agent naphthylacetic acid with the concentration of 10-30 mg/L.

Further, selecting a proper period, and spraying the flower thinning agent on the Or tree body comprises the following steps:

a. spraying a first pre-prepared flower thinning agent, namely sodium rosinate, on the citrus thinning tree body needing flower thinning 2 days before the full-bloom period of the whole citrus thinning plant, wherein the citrus thinning tree body is required to be fully and uniformly sprayed from top to bottom when spraying the pesticide until branches and leaves drip;

b. and (3) spraying the prepared second flower thinning agent calcium formate to the citrus woolly trees needing flower thinning 2 days before the full-bloom stage of the whole citrus woolly plants, and fully and uniformly spraying the second flower thinning agent calcium formate from top to bottom until branches and leaves drip water when spraying the pesticide.

Further, selecting a proper period, and spraying the fruit thinning agent on the Or tree body comprises the following steps:

spraying a pre-prepared sodium rosinate fruit thinning agent on the citrus vorax trees needing fruit thinning 1-2 days after the flowers are withered, repeatedly spraying the same fruit thinning agent at the same concentration once after one week, and spraying the pesticide until branches and leaves drip from top to bottom fully and uniformly; and spraying the prepared second naphthylacetic acid fruit thinning agent aqueous solution on the citrus vorax trees needing fruit thinning 1-2 days after the flowers are withered, repeatedly spraying the same fruit thinning agent with the same concentration once after one week, and spraying the pesticide until branches and leaves drip from top to bottom fully and uniformly.

Further, as a preferred embodiment of the present invention, the concentration of the first flower thinning agent sodium rosinate used is 4.5g/L, and the concentration of the second flower thinning agent calcium formate is 30 mg/L.

Further, as a preferred embodiment of the present invention, the concentration of the first agent, sodium rosinate, is used at 9g/L and the concentration of the second agent, naphthylacetic acid, is 30 mg/L.

Further, as a preferred embodiment of the invention, spraying the flower thinning agents of sodium rosinate and calcium formate 2 days before the full-bloom period; full bloom stage is 50% of blooming.

Further, as a preferred embodiment of the invention, the fruit thinning agents of sodium abietate and naphthylacetic acid are sprayed 1-2 days after the flowers are withered.

The invention also aims to apply the green labor-saving flower and fruit thinning method for the citrus reiliana to the labor-saving production control technology for the citrus reiliana.

In summary, the advantages and positive effects of the invention are:

the invention utilizes the efficient green flower and fruit thinning agent to replace manual flower and fruit thinning to regulate and control the yield of the oranges, does not damage the orange trees, has good flower and fruit thinning effect, saves labor and time, greatly reduces the flower and fruit thinning cost, and has the technology obviously superior to the manual flower and fruit thinning. The method basically solves the problems of excessive flowering amount and high fruit setting rate of the Or trees, effectively reduces the excessive nutrient consumption caused by excessive flowering and fruit carrying, increases the fruit volume and the single fruit quality, improves the fruit quality, and plays a role in cost saving and efficiency improvement through a green way.

Drawings

Fig. 1 is a flow chart of a method for green and labor-saving flower and fruit thinning of an Or citrus provided by the embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to solve the technical problem of flower and fruit thinning of the Or, the invention screens the types of novel chemical flower and fruit thinning medicaments through a large amount of early-stage experimental investigation and data analysis, determines the appropriate use time, and optimizes the medicament proportioning concentration to obtain the optimal flower and fruit thinning method of the Or. The method can reasonably reduce the fruit setting rate of the citrus reticulata blanco, reduce the task amount of manual fruit thinning, meet the normal growth of citrus trees, reduce unnecessary nutrient loss of the trees, control the yield, stabilize the yield, improve the fruit quality, greatly reduce the labor cost and increase the comprehensive economic benefit of an orchard.

The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings.

As shown in fig. 1, the method for green flower thinning and fruit thinning of the wampee citrus provided by the embodiment of the invention comprises the following steps:

s101: preparing a flower thinning agent: weighing a proper amount of sodium rosinate (total effective component 45%), adding tap water into the sodium rosinate to promote dissolution, and fully and uniformly mixing to obtain a first flower thinning agent sodium rosinate with the concentration of 3-18 g/L; weighing a proper amount of calcium formate and directly adding water, and taking a 15 kg/medicine spraying barrel to be mixed with 0.2 g-0.6 g of calcium formate medicine as a reference to obtain a second flower thinning agent calcium formate with the concentration of 10 mg/L-30 mg/L;

s102: preparing a fruit thinning agent: weighing a proper amount of sodium rosinate (total effective component 45%), adding tap water into the sodium rosinate to promote dissolution, and fully and uniformly mixing to obtain a first fruit thinning agent sodium rosinate with the concentration of 3-18 g/L; weighing appropriate amount of naphthylacetic acid (NAA), adding 0.02g of analytically pure granular NaOH and 10ml of water to promote dissolution, fully and uniformly mixing, and taking 150-450 mg of naphthylacetic acid mixed in a 15 kg/pesticide spraying barrel as a reference to obtain a second flower thinning agent naphthylacetic acid with the concentration of 10-30 mg/L;

s103: selecting a proper period, and spraying a flower thinning agent on the Or tree body: a. spraying a first flower thinning agent sodium rosinate prepared in advance according to the step one on the Wo citrus trees needing flower thinning 2 days before the full-bloom period (about 50% of flowers blossoming) of the Wo citrus plants, wherein the Wo citrus trees are required to be fully and uniformly sprayed from top to bottom when spraying the flower thinning agent sodium rosinate until branches and leaves drip; b. spraying the second flower thinning agent calcium formate prepared in the step one on the Wo citrus trees needing flower thinning 2 days before full-plant full-bloom period (about 50% of flowers), wherein the second flower thinning agent calcium formate is required to be fully and uniformly sprayed on the Wo citrus trees from top to bottom when spraying is carried out until branches and leaves drip;

s104: selecting a proper period, and spraying a fruit thinning agent on the Or tree body: 1-2 days after the flowers are withered, spraying the sodium rosinate fruit thinning agent prepared in advance in the second step on the citrus vorax trees needing fruit thinning, repeatedly spraying the same fruit thinning agent at the same concentration once after one week, and spraying the pesticide until the branches and leaves drip from top to bottom fully and uniformly; and (3) spraying the second naphthylacetic acid fruit thinning agent aqueous solution prepared in the second step on the citrus vorax trees needing fruit thinning 1-2 days after the flowers are withered, repeatedly spraying the same fruit thinning agent with the same concentration once after one week, and spraying the pesticide until the branches and leaves drip from top to bottom fully and uniformly.

Further, as a preferred embodiment of the present invention, the concentration of the first flower thinning agent sodium rosinate used in the first step is 4.5g/L, and the concentration of the second flower thinning agent calcium formate is 30 mg/L.

As a preferred embodiment of the present invention, the concentration of the first agent, i.e., sodium rosinate, used in step two is 9g/L, and the concentration of the second agent, i.e., naphthylacetic acid, is 30 mg/L.

The invention is further described with reference to specific examples.

The method aims at solving the problems that the manual flower and fruit thinning method in the prior art is low in efficiency, high in cost, large in labor consumption, too long in time spent on recovering yield, and few in application of the flower and fruit thinning agent to oranges. The invention adopts the novel safe green flower and fruit thinning agent to replace manual flower and fruit thinning to regulate the output of the oranges, scientifically screens the proportion of flower and fruit thinning substances and the using time, greatly reduces the fruit thinning cost, controls the output, improves the quality of the oranges, prevents the occurrence of year-to-year phenomenon, has no process of yield recovery, and increases the comprehensive income of orchards.

Example 1:

according to the formula of the Wo citrus chemical flower thinning agent, 135g to 800g of sodium rosinate is weighed according to the formula (total effective component is 45%) of the first flower thinning agent, clear water is directly added into the sodium rosinate, the first flower thinning agent is fully dissolved and uniformly mixed to obtain the flower thinning agent sodium rosinate with the concentration of 3g/L to 18g/L, and the second flower thinning agent is calcium formate with the concentration of 10mg/L to 30 mg/L. In 2017, in 4 months, a thinning effect test is carried out on a Wai citrus standardized orchard of Wai citrus agriculture limited company in Xinzhu town osmanthus fragrans village, Zhongqing city, the altitude of the orchard is 410m, and the management level is good. The test citrus reishi tree is a four-year old high-yield citrus reishi tree, the intermediate stock of the parent tree is 21-year old Hamlin sweet orange, the base stock is Citrus aurantium, the crown width of the high-yield citrus reishi tree is about 4.1m multiplied by 3.7m, and the plant-row spacing is 4m multiplied by 3.5 m. Selecting tree vigor with basically consistent size, selecting 3 trees for each treatment, repeating for three times, selecting 4 big branch brands in four different directions of east, south, west and north in the middle of the tree body before spraying the pesticide, and facilitating the treatment and then carrying out data investigation and statistics. The flower thinning agent sodium abietate is used for 1 time 2 days before the full bloom period of the Or and the concentration is 3 g/L-18 g/L, and the spraying is repeated after 2 days. Or spraying the flower thinning agent calcium formate solution with the concentration of 10 mg/L-30 mg/L2 days before the full-bloom period of the Or citrus reissue, and repeatedly spraying the solution 2 days later. The spraying time is selected as far as possible in the morning of a fine day, the leaves have no dew basically, and the spraying is fully and uniformly carried out on the Wo citrus trees from top to bottom until the water drops appear on the branches and tips and the leaves. And (4) taking spraying clear water as a control, investigating and counting the flower falling rate and the fruit setting rate of the spraying agent 7 days, 20 days and 30 days after spraying. In the mature period of the Wo citrus fruits in the next year (3 months in 2018), 4 fruits are randomly picked from four directions of the test tree, namely south, west and north, and 30 fruits are picked for quality analysis and yield measurement in each test treatment. Measuring the quality of single fruit with electronic balance with one percent precision, measuring soluble solid with PAL 1 digital display saccharimeter, measuring titratable acid content of fruit with NaOH neutralization titration method, measuring total sugar content of fruit with film reagent method

TABLE 1 statistical table of the effect of chemical flower thinning agent on fruit setting rate of Or

As can be seen from Table 1, compared with a clear water control group, the two flower thinning agents, namely the sodium rosinate and the calcium formate, have obvious effects on the Wo citrus, the flower thinning rate of all treatment concentrations is lower than that of the control group, and the sodium rosinate 18g/L and 9g/L cause large damage to leaves and flower organs, so that the use of the sodium rosinate is not recommended. In all treatments, the flower thinning effect of the flower thinning agent with the sodium rosinate of 4.5g/L is the best in a comprehensive view, the total flower falling rate reaches 73.33% after 7 days of spraying, the flower (fruit) thinning rate can reach 77.84% after 20 days of spraying, and the flower (fruit) thinning rate exceeds 81% after 30 days of spraying. Whereas the control showed a flower-fall rate of 63.22% after 30 days.

TABLE 2 statistical table of the effect of chemical flower thinning agent on fruit quality and plant yield of Or

As can be seen from Table 2, compared with the clear water control group, the two flower thinning agents with different concentrations do not affect the internal quality of the fruits, and after the flowers are thinned by using the sodium rosinate and the calcium formate, the yield control purpose is achieved, meanwhile, the nutrient competition caused by excessive fruit setting is reduced, the single fruit weight is obviously improved, and the effect of improving the fruit quality is good. The formula of the flower thinning agent with the sodium rosinate content of 4.5g/L is good in flower thinning effect by integrating fruit quality and average plant yield.

Example 2:

according to the formula of the Wo citrus chemical fruit thinning agent, 135g to 800g of sodium rosinate is weighed according to the formula (total effective component is 45%) of the first fruit thinning agent, clear water is directly added into the sodium rosinate, the first fruit thinning agent is fully dissolved and uniformly mixed to obtain the flower thinning agent sodium rosinate with the concentration of 3g/L to 18g/L, and the second fruit thinning agent is naphthylacetic acid with the concentration of 10mg/L to 30 mg/L. In year 2017, in 4 months, a thinning effect test is carried out in a Wakan standardized orchard of Wakan agriculture limited company in Xinliqing Osmanthus village county, Chongqing city, wherein the Wakan test tree is a four-year-old Gaoshan tree, the intermediate stock of a Gaoshan mother tree is 21-year-old Hamlin sweet orange, the base stock is Citrus aurantium, the crown width of the Gaoshan orange tree is about 4.1m × 3.7m, and the row spacing is 4m × 3.5 m. Selecting tree vigor with basically consistent size, selecting 3 trees for each treatment, repeating for three times, selecting 4 big branch brands in four different directions of east, south, west and north in the middle of the tree body before spraying the pesticide, and facilitating the treatment and then carrying out data investigation and statistics. The fruit thinning agent sodium rosinate is used for 1 time and 2 days after flowers are faded in the oranges, the concentration of the fruit thinning agent sodium rosinate is 3 g/L-18 g/L, and the fruit thinning agent sodium rosinate is repeatedly sprayed for one time after 2 days. Or spraying a fruit thinning agent naphthylacetic acid solution with the concentration of 10 mg/L-30 mg/L1-2 days after the flowers are withered by the Or spraying the solution once again after 2 days. The spraying time is selected as far as possible in the morning of a fine day, the leaves have no dew basically, and the spraying is fully and uniformly carried out on the Wo citrus trees from top to bottom until the water drops appear on the branches and tips and the leaves. And (5) taking spraying clear water as a control, spraying for 20 days and spraying for 30 days, investigating and counting the fruit setting rate of the spraying agent. In the mature period of the Wo citrus fruits in the next year (3 months at the end of 2018), 4 fruits are randomly picked from four directions of the test tree, namely south, west and north, and 30 fruits are picked for quality analysis and yield measurement in each test treatment. The quality of a single fruit is measured by an electronic balance with one percent of precision, a PAL 1 digital display saccharimeter measures soluble solid, a NaOH neutralization titration method measures titratable acid content of the fruit, and a film reagent method measures total sugar content of the fruit.

TABLE 3 statistical Table of the effect of chemical thinning agent on Wo citrus thinning effect

As can be seen from Table 3, compared with the control group with clear water, the young fruit thinning rate of the chemical fruit thinning agent is over 67%, the control group is under 60%, 2 fruit thinning agents with different concentrations have better fruit thinning effect, and the fruit setting amount of the Or citrus trees is effectively reduced. With the increase of the spraying concentration of the sodium rosinate and the naphthylacetic acid, the fruit thinning effect gradually becomes better to be optimal, but the phenomenon that the pesticide damage is caused to leaves or young fruits of trees due to overhigh concentration of the pesticide is prevented. The fruit thinning effect of the fruit thinning agent with 9g/L of sodium rosinate is the best, the fruit setting rate is only 15.62 percent after spraying for 30 days, the young fruit thinning rate is 84.38 percent, and the fruit thinning agent has better effect compared with the naphthylacetic acid with 30 mg/L. By using the fruit thinning agent, partial fruits are effectively thinned, the nutrient loss in the young fruit period is reduced, and the growth and development of the reserved fruits are promoted.

TABLE 4 statistical Table of the effect of chemical flower thinning agent on fruit quality and plant yield of Or

As can be seen from Table 4, compared with the clear water control group, the two thinning agents with different concentrations have no side effect on the internal quality of the Or fruit, but on the contrary, the quality of a single fruit is improved after the thinning agent is used, the good and positive promotion effect on improving the fruit quality is also achieved, and meanwhile, the yield control purpose of the Or fruit is efficiently realized. The fruit thinning agent has the advantages that the fruit thinning effect is good due to the fact that the fruit quality and the average plant yield are integrated, the formula is the sodium rosinate 9g/L fruit thinning agent, the single plant yield of the Or can be controlled within a reasonable range of about 40 kg-50 kg, the tree vigor can be kept, the appearance in the year and the year is prevented, and the orchard benefit is stabilized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The green flower and fruit thinning method is characterized in that a proper period is selected through proper novel chemical flower and fruit thinning medicament types and medicament proportioning concentrations, and flower thinning agents or fruit thinning agents are sprayed on the citrus wowen trees;

weighing a proper amount of sodium rosinate, adding tap water into the sodium rosinate to promote dissolution, and fully and uniformly mixing to obtain a flower thinning agent sodium rosinate with the concentration of 3-18 g/L;

weighing a proper amount of sodium rosinate, adding tap water into the sodium rosinate to promote dissolution, and fully and uniformly mixing to obtain a fruit thinning agent sodium rosinate with the concentration of 3-18 g/L;

selecting a proper period, and spraying the flower thinning agent on the Or tree body comprises the following steps:

spraying a prepared flower thinning agent sodium rosinate 2 days before the full-bloom period of the whole Wo citrus plant on Wo citrus trees needing flower thinning, wherein the Wo citrus trees are required to be fully and uniformly sprayed from top to bottom during spraying until branches and leaves drip;

selecting a proper period, and spraying the fruit thinning agent on the Or tree body comprises the following steps:

spraying a pre-prepared sodium rosinate fruit thinning agent on the citrus vorax trees needing fruit thinning 1-2 days after the flowers are withered, repeatedly spraying the same fruit thinning agent at the same concentration once after one week, and fully and uniformly spraying the citrus vorax trees from top to bottom until branches and leaves drip when spraying the pesticide.

2. The method for green, labor-saving flower and fruit thinning of claim 1, wherein the concentration of the flower thinning agent sodium rosinate is 4.5 g/L.

3. The method of claim 1, wherein the concentration of the sodium rosinate is 9 g/L.