The Prevention and Control Techniques of "Peltosis" on the Fruit Surface of Huangguan Pear

First, symptoms and causes

Fruit is onset in the near-mature period. At the early stage of the disease, brownish crescent-like or spot-like textures appear near the lenticels. With the development of symptoms, the lesions are slightly enlarged, the color is deepened, and the lesions are slightly sunken. Multiple lesions occur at different parts of the fruit at the same time. Pear fruit on the surface of the formation of irregular, irregular distribution of dark brown spots, block or texture of lesions or lesions, because of its performance on the fruit surface and the chicken scratching traces similar to the fruit farmers call it

"Chicken paw disease" or "chicken paw disease." Severely diseased multiple lesions can be connected together to form a nearly circular depression around the lenticels.

There are three reasons for the formation of villous leaf spot: imbalance of calcium nutrients after bagging; cracking of the peel of the skin is large and lack of protection of the stratum corneum; enzyme activity is high. The microenvironment of the fruit after bagging is different from that of unbagging, resulting in a decrease in the level of calcium nutrients. The combination of the two results in increased cracking of the pericarp and lack of a stratum corneum, thereby stimulating the enzymatic reaction leading to browning. A dense tissue structure (spots) is formed to protect the diseased part (it can also be said that the formation of lesions is an immune protection mechanism of Huangguan pear itself). Therefore, the lesion does not expand and does not rot. It only affects the commodity value of the fruit.

The factors affecting the occurrence and prevalence of diseases mainly include: bagging (including paper bag type, color, translucency, air permeability, etc.), partial application of nitrogen fertilizer, fruit swelling rate, climate and soil fertilizer status.

Second, comprehensive prevention and control technology

1. Fertilization: Reapply organic fertilizer and pay attention to balanced fertilization. Apply 3 to 5 square cent of organic fertilizer per acre in autumn. Soils with deep soil layers can be deep-swapped after spreading, and sand, sticky, and alkaline soils should be used to dig trenches and fertilize soil. In severe cases, 100 to 200 grams of sodium tetraborate (borax) can be applied before flowering. During the development period, the effect fertilizer is not recovered, and if the tree vigor is weak, the nitrogen and phosphorus compound fertilizer can be applied in the early stage of development (the amount of the tree strain in the fruit period does not exceed 3 kg).

2. Winter shearing and thinning and fruit thinning: The winter shear should pay attention to the reasonable distribution of the branches to ensure the ventilation and light transmission within the crown. The fruit quantity per acre does not exceed 14,000, and the output is controlled at 3500-4000 kg.

3. Young fruit spray calcium: young fruit (before fruit bagging) spray Ryan calcium and other organic calcium salts, spray once every 7 to 10 days, and even spray 2 or 3 times.

4. Bagging: Use a fruit bag with good permeability and light transmission (light transmittance is about 10%), or you can use fruit bags coated with active material in the inner layer. The bagging period is from late May to early June.

5. Watering: The water before flowering and frozen water must be poured. The watering in other periods depends on the fertilization and water requirement, avoid flooding.

In addition, multiple cultivators can increase the temperature of the soil and increase the activity of the root system of the absorption layer, thereby increasing the absorption efficiency of calcium and, to some extent, reducing the incidence.

Road Milk Tanker/Milk Tank truck

Product Description

LEO company is the only supplier use of air suspension technology manufacturing milk transport trailer in China market. We also have 40tons of fresh milk transport trailer special announcement. We strict implementation of LEO enterprise standards which is higher than national standards, and the Ministry of Agriculture through the identification, to ensure product quality, high security factory, allowing user safer and more economical use of the product. The product is widely used in New Hope Dairy, Chongqing Tianyou Dairy, Heilongjiang Wandashan Dairy, Shanghai Bright Dariy, Yili, Mengniu Dairy, Sanyuan Dairy, Bright Dairy, Shenyang Huishan, Beijing Zhongdi, Ningxia Jiujjiajiu milk transportation company(for Ningxia Mengniu, Yili, Chongqing Tianyou) etc.

Features:

1.    semi-trailer classis with air suspension bridge, effectively reduce the chassis weight 2.8 tons, so that the vehicle is running more fuel-effcient and more economical; and the user of the rear axle air suspension make tanker traveling more secure.

2.    Milk receiving and discharge, use electronically controlled pneumatic exhaust valve technology, driver in the cab can operate the process more convenient and more secure.

3.    Manhole Cover with mechanical hard seal, instead of a rubber ring seal, reducing pollutions and avoiding freezing milk in winter times. Manhole cover and eliminating wearing parts.

4.    Thicker insulation layer, insulation materials using polyurethane foam 100 mm, ensuring milk quality in long-distance transportation.

5.    Tank partitions seal head conical seal head, impact resistance more stronger, effectively extending the service life of the tank.

6.    Partition on both sides of the inner tank are large arc transition, which ensuring no cleaning blind angle in side tank. Milk tank body inner seal head with a radius of 30mm special mold spin forming,the interior of the partition using

7.    Tank body polyurethane foam insulation layer by vacuum technology, thermal insulation effect is good, full volume temperature change within 12 hours temperature does not exceed 2℃. Insulation layer can be tailor-made to meet the insulation requirements of different customers.

8.    Trailer type road Milk Tanker can use disc, ABS control system.

9.    The technical requirements for Road milk tanker meet GB1589 triaxial vehicle standards, and to provide all the formalities to meet the requirements to circulated on road. Chassis through the 3C cerification, compliance with motor vehicle licensing regulations.

Milk Tanker Truck

Milk Tanker Truck,Tank Milk Truck,Milk Cooler Tank Truck,Cow Milk Tanker

Henan Leo Husbandry Equipment Science and Technology Co.ltd , https://www.chinaleodairy.com