Do pear trees need cross pollination? What temperature is the temperature for pear blossoms to polli

Pear trees need cross-pollination, and pear trees belong to cross-pollinating plants, which are pollinated within species.

For varieties with low self-flowering and seed setting rate, it is necessary to configure pollination trees, and if the pollination varieties are not configured, artificial pollination, artificial pollination should be collected 2-3 days before pollination of varieties suitable for pollination, fully expanded flower buds or just opened flowers on adult trees of varieties suitable for pollination, anthers should be taken, dried and pollinated, and manpower should be concentrated on manual teaching at the beginning of the flowering period.

Pear is a cross-pollinating plant, and the pollination and fruit setting rate within the variety is very low or even no fruit set. The planting of pollinated varieties can promote the pollination and fruiting of pear trees, and the ratio of pollinated trees to original trees is 1 3.

Or: Artificial pollination.

1. Artificially assisted pollination method: select varieties with strong affinity and large pollen amount as pollination varieties, collect flowers that are about to open or have just opened, remove the anthers, put them in a pot, and after 24 hours under 25 warm air conditioning, the anthers will crack and collect pollen. Then artificial pollination is carried out, the pollen is packed in a small bowl during pollination, a small rubber tube is wrapped in a toothpick to dip the pollen, and the stigma of the pollinated tree is gently rubbed, and more than 10 flowers can be given each dip.

2. Selection of pollination varieties: under normal circumstances, early new water + emerald crown, emerald crown + fragrance or snow pear pollen (purchased by Zhejiang Yalin), snow green + fragrance, crisp green + fragrance, snow green, etc., yellow flower + green crown, fragrance, snow green, etc.

3. Precautions: 1) If the pollinated variety is a small fruit type, it should be pollinated with a large fruit type variety to make the fruit larger. 2) If it is cultivated in the open field, it is also recommended to adopt artificial assisted pollination to improve the fruit setting rate of pear trees, make the fruit shape correct and increase the fruit.

Pear trees are widely distributed in our country, there are pear trees from south to north, the pear trees in the southern region generally, the flowering time is mostly in March, the western part of our country generally blooms around mid-March, and the pear trees in the northern region of our country bloom mostly around mid-April, and end in early May. The flowering of pear trees is greatly affected by temperature, high temperature, early flowering, and low temperature, then flowering is delayed. Generally, the suitable temperature for pear tree flowering is about 14 degrees, and the temperature is higher than 30 degrees Celsius, or lower than 8 degrees, which is not conducive to flowering and pollination.

How to manage the pear tree during the flowering period to minimize the adverse effects of the spring cold and improve the fruit setting rate of the pear tree?

1. Reasonable matching of pollinating trees, pear trees during flowering, we see a full tree of pear blossoms, I believe that many people think that so many flowers will definitely set more and better fruits, and some friends plant pear trees, more flowers, less fruit set, which is related to the unreasonable pollination of pear trees. The self-pollination rate of pear trees is very low, there must be different tree species, cross-pollination, which is of great help to improve the fruit setting rate, generally pear trees are planted in an orchard at the same time to pollinate each other, in order to improve the fruit setting rate, in accordance with the word "product" when planting, when the flowers open, the release of bees to help pollination, can greatly improve the fruit setting rate.

2. Spraying pesticides during the flowering period, the flowering period of pear trees is generally about 5 7 days, and the time of concentrated opening can reach about 80% of the pollination success in 1 3 days. Pear trees are generally self-pollinating and the seed setting rate is relatively low, after being equipped with interpollination tree species, it is necessary to carry out appropriate spraying of borax + Tianda 2116, spraying in the early stage of flower buds, spraying pesticides in the full flowering period of pear trees, which is easy to cause pear trees to reduce fruit setting rate due to poor pollination.

3, apply phosphate fertilizer before flowering, before the flowering period of the pear tree, carry out the flushing of potassium dihydrogen phosphate, each pear tree is filled with potassium dihydrogen phosphate + a variety of trace elements amino acid fertilizer dilution, each plant is about 100 kg of water solution, after the pear tree sets fruit, it will usher in the first physiological fruit drop period, in order to reduce fruit drop, increase the ability to keep flowers and fruits, after the fruit sits, you can use soluble potassium sulfate + borax + brassinolide to spray the whole plant, which has the effect of reducing fruit drop.

4. The use of base fertilizer, pear trees use fully rotted farmhouse fertilizer before planting, and in the fruit-setting growth period of pear trees, a certain amount of fully rotted farmhouse fertilizer should be applied every year, or beneficial microbial organic fertilizer, etc., to increase the nutrient content in the soil, so that the root system of the pear tree is in a better soil growth space and improve stress resistance. The moisture in the soil can be kept at about 55%, not too much, to prevent diseases, but it is not conducive to improving the fruit setting rate of pear trees.

The best time for pollination of pear blossoms is between 8 a.m. and 4 p.m., and the best pollination temperature is above 15-20 degrees. When the maximum temperature of the day is 30 degrees, pollination should be carried out in the morning or evening to avoid scorching stigma. If the weather is bad during the flowering period, it is best to pollinate twice, which can greatly improve the pollination rate.

When the temperature reaches 12 degrees, the pear blossom is able to pollinate, because if the temperature is too low, the pollination will not be successful.

I think the best temperature for pear pollination is above 15 degrees and below 30 degrees.

<>Happy Burning Mold] Hello friends, spraying pesticides during the peak flowering period of pear trees may have a certain impact on pollination. Some common insecticides and fungicides, especially broad-spectrum insecticides and fungicides, can destroy the pollen and anthers on the pear tree, resulting in the pollen not being released normally, thereby reducing the pollination efficiency of the pear tree. Therefore, when spraying pesticides during the full flowering period of pear trees, the following points need to be noted:

1.Try to choose pesticides that have less effect on pollen and anthers, and use them correctly according to the instructions for use. 2.

Spray pear trees before or after flowering. 3.In cases where spraying must be carried out during the full flowering period of the pear tree, agents that target specific pests or diseases can be used, and spraying the agent should be carried out between the source of lead in the morning or in the evening to reduce the impact on the pollen and anthers of the pear tree.

In summary, the correct selection and use of pesticides and the avoidance of spraying during the flowering period of the pear tree can minimize the impact of pesticides on the pollination of pear trees and ensure the normal growth and development of pear trees.

The methods of artificial pollination of pear trees include pear orchard bee release, manual point teaching, pollen bag teaching, instrument pollination, liquid pollination, etc.

1. Put bees in the pear orchard.

The pollination efficiency and adaptability of ordinary bees are relatively weak, so the pollination of wall bees is mostly used in the production of pear orchards. The wall bee belongs to the family of bees, and is an excellent pollinator of apples, pears, peaches, cherries, apricots and plums, such as roses, fruit trees and kiwifruit.

2. Manual teaching.

Manual teaching refers to the use of a homemade pollinator (paper stick, eraser head, brush, etc.) to dip pollen into the pollen at the time of flowering. Generally, 1-2 side flowers can be given for each inflorescence.

3. Pollen bag teaching.

Pollination in pollen bags is the same as manual pollination, and it is also very simple to manipulate Shimin, just mix the pollen with 50 times the talcum powder filler, put it into a two-layer gauze bag, tie it to a bamboo pole, and then gently shake the pollen bag above the canopy to make the powder evenly sprinkled on the flower stigma.

4. Instrument pollination.

There are generally two types of instrument pollination, one is a pistol pollinator and the other is a hand-pressure balloon precision pollinator. Other commonly used pollination tools are feather dusters, mountain branches, powder guns, etc. However, these methods are less used in production due to the large amount of pollen, low work efficiency, and very high labor costs.

5. Liquid powder spraying.

Use a sprayer to spray the pollen liquid onto the flowers during the full flowering period, but it is not advisable to spray until the flowers are dripping. The pollen liquid is prepared as: 10 kg of water + 10-20 grams of pollen + kg of sugar + 50-100 grams of borax.

Hello, the pear tree varieties that do not need artificial pollination are the golden autumn honey pear, the golden autumn honey pear is a new pear tree variety with short branches and dense planting type fruiting, and the golden autumn honey pear, also known as the columnar pear, is a new pear tree variety with short branches and fruits, which has the advantages of early flowering, early fruiting, long fruiting period, and storage resistance. The flowering period of the golden autumn honey pear does not need artificial pollination, relying on natural bees, butterflies, wind congchang, etc., pollination can be completed, and the variety is also a self-pollinating variety, which does not need to be matched with pollinating trees, and is a new variety of pear trees that is very labor-saving and labor-saving. At the same time, there are rainbow pears, Danxia red pears and other varieties that do not need to be pollinated manually.

Summary. Pear trees are self-pollinating and not fruit-bearing (self-incompatible and incompatible) fruit trees, and pear orchards must be reasonably configured with pear pollination varieties or artificially assisted pollination during flowering period to ensure high yield, stable yield and high quality and beauty.

Pear tree flowers are monoecious, so why can't they be pollinated with a flower but cross-pollinated?

Pear trees are self-pollinating fruit trees that do not bear fruit in spring (self-incompatible and slow), and pear orchards must be reasonably configured with pear pollination varieties or artificially assisted pollination during flowering to ensure high yield, stable yield and high-quality and beautiful appearance.

As a fruit tree with self-pollination and non-fruiting, the self-pollination and seed setting rate of pear tree is very low, which has a serious impact on the yield of orchards and the quality of pears, so as to restrict the development of pear tree industry in China. Based on this, when cultivating pear trees, fruit farmers must configure appropriate pollination trees in the orchard, and combine appropriate auxiliary pollination methods to complete the pollination and fertilization process of pear trees more smoothly, so as to achieve the purpose of high yield, stable yield and high quality in the orchard. At present, in the cultivation and management of pear trees, the most frequently used assisted pollination methods are mainly manual assisted pollination, bee pollination and liquid pollination or absolute pollination.

Shirt late posture.