NL2030034A - Method for preventing greenhouse loquat fruit from freezing injure at extreme cold temperature and promoting early ripening - Google Patents

Method for preventing greenhouse loquat fruit from freezing injure at extreme cold temperature and promoting early ripening Download PDF

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Publication number
NL2030034A
NL2030034A NL2030034A NL2030034A NL2030034A NL 2030034 A NL2030034 A NL 2030034A NL 2030034 A NL2030034 A NL 2030034A NL 2030034 A NL2030034 A NL 2030034A NL 2030034 A NL2030034 A NL 2030034A
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greenhouse
temperature
shed
foil
film
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NL2030034A
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NL2030034B1 (en
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Xu Hongxia
Wang Qiong
Pei Huimin
Chen Junwei
Wang Li
Li Xiaoying
Yin Yimin
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Zhejiang Acad Agricultural Sci
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
    • A01G17/005—Cultivation methods
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/14—Greenhouses
    • A01G9/1407—Greenhouses of flexible synthetic material
    • A01G9/1415—Greenhouses of flexible synthetic material with double or multiple walls

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Botany (AREA)
  • Greenhouses (AREA)

Abstract

The present disclosure provides a method for preventing greenhouse loguat fruit from freezing injure at extreme cold temperature and promoting early ripening, and belongs to the technical field of facility cultivation of fruit trees. The present disclosure improves snow resistance through facility structure, employs early closing of the shed film and heating at night, so that the temperature in the shed reaches above 0 °C from December to January, and the temperature in the shed reaches above 10 °C from February to March, thereby achieving commercial loguat cultivation in the extreme conditions of low temperature —l4 °C area, the maturity period is from mid—March to early April, which is 40—50 days earlier than the open—field maturity period, and 20—30 days earlier than the ordinary double—film greenhouse without heating, to achieve antifreeze, early maturity and high yield.

Description

P878/NLpd
METHOD FOR PREVENTING GREENHOUSE LOQUAT FRUIT FROM FREEZING INJURE
AT EXTREME COLD TEMPERATURE AND PROMOTING EARLY RIPENING
TECHNICAL FIELD
The present disclosure belongs to the technical field of fa- cility cultivation of fruit trees, and in particular relates to a method for preventing greenhouse loquat fruit from freezing injure at extreme cold temperature and promoting early ripening.
BACKGROUND ART
Loquat is a subtropical evergreen fruit tree, which blooms and sets fruits in autumn and winter, and the flowering and fruit- set period is in the coldest winter of the year.Young fruits of loquat are frozen at -3°C and flowers are frozen at - 6°C. There- fore, the commercial loquat cultivation cannot be carried out in areas where the temperature is lower than - 6°C.Using greenhouse cultivation is an effective measure to prevent freezing in culti- vation of cold area and promote early maturity of loquat. By uti- lizing facilities cultivation, the environment temperature of field can be increased above -3°C, which can protect the young fruit and flower of loguat from freezing. Facilities cultivation not only can expand the loquat planting area to a lower tempera- ture area, but also can acquire a high prices in the market by earlier maturation. However, the current facility of two-layer plastic film can only increase temperature 4-6°C, which still cannot prevent flower from freeze injure in the area at temperature be- low -12°Cand advance fruit maturation further because night temper- ature below 10°C from February to March.The temperature below 10°C cannot meet the requirements of growth and development for the lo- quat fruit. Therefore, in order to make the fruit of loquat mature 40-50 days earlier in facility than that in the open field and survive the fruit and flower from the lower temperature below - 12°C, it is necessary to develop a new method for facility loquat to prevent fruit and flower from extreme low temperature damage and promote early maturity.
SUMMARY
In view of this, the purpose of the present disclosure is to provide a method for preventing greenhouse loquat fruit from freezing injure at extreme cold temperature and promoting early ripening, which can realize commercial cultivation of loguat in the area of extreme low temperature at -14°C, and the maturity pe- riod is from mid-March to early April, which is 40-50 days earlier than that in open field, 20-30 days earlier than that in the ordi- nary double-film greenhouse without heating, and achieves anti- freeze, early maturity and high yield.
In order to achieve the above-mentioned purpose of the pre- sent disclosure, the present disclosure provides the following technical solutions:
A method for preventing greenhouse loquat fruit from freezing injure at extreme cold temperature and promoting early ripening, wherein it comprises the following steps:
December-January: When the temperature is above 0°C during the day, open shed film for ventilation at 8:00-15:00, close the inner and outer film of the shed from 15:00-8:00; maintain the temperature inside the shed above 0°C at night;
February-March: Open the top film of the inner film and skirt film of the inner film of the greenhouse from 8:00 to 2:00, open the outer film of the top film and skirt film of the outer film of the greenhouse from 9:00 to 9:30, close the outer film during 13:00-14:00, close the inner film during 14:00-15:00; maintain the temperature in the greenhouse above 10°C at night;
April: when the temperature outside the shed is lower than 10°C, close the shed film for preserving heat; when the temperature outside the shed is higher than 10°C, open the inner and outer film of the greenhouse from 7:30 to 15:00, and close the outer film of the greenhouse from 15:00 to 7:30.Compared with the prior art, the present disclosure has the following beneficial effects:
The present disclosure provides a method for preventing greenhouse loquat fruit from freezing injure at extreme cold tem-
perature and promoting early ripening. The structure of the facil- ity is improved to resist snow, and the shed film is closed early and heated at night to make the temperature in the shed reach above 0°C from December to January, reach temperature in the shed above 10°C from February to March. So it can realize the commercial loquat cultivation in the extremely low temperature area of tem- perature at -14°C. The maturity period is from mid-March to early
April, which is 40-50 days earlier than that in the open field, 20-30 days earlier than that in the ordinary unheated double film greenhouse. This method can achieve extremely low temperature re- sistance, early maturity and high yield.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1: Schematic diagram of the transverse cross-section of the greenhouse facility structure of the present disclosure.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The present disclosure provides a method for preventing greenhouse loquat fruit from freezing injure at extreme cold tem- perature and promoting early ripening. In traditional loguat greenhouse cultivation, it has the defects of poor snow re- sistance, poor thermal insulation, and low night temperature. Us- ing structural improvement and reasonable application of the open- ing time of the shed film combined with the use of timely and mod- erate heating, the night temperature in the shed is increased to meet the needs of anti-freezing and promoting the earlier growth of young fruits, so as to realize earlier maturity of loquats in the facilities.
The improvement of the anti-snow structure of the greenhouse:
Two aspects are improved.
On the one hand, the structure is improved to provide the snow resistance. In the present disclosure, the space between the pillars of the greenhouse is 3-3.5m, the space between the arches is 0.6-0.8m, and the gutter thickness is 2.5-3.0mm; further pref- erably, the space between the pillars is 3m, and the space between arches is 0.8m. The gutter thickness is 2.5mm. As an implementable manner, the pillar foundation is composed of concrete with 4 steel bars of length x width x depth=0.4x0.4x0.8. The facility green- house of the present disclosure can resist 40cm thick snow in ex- tremely cold areas.
The second is to increase the height of the shed, increase the distance between the two films, and enhance the thermal insu- lation effect. The preferred facility of the present disclosure has a greenhouse with a span of 7.5-8.5m, a length of 50-60m, a ceiling height of 5.7-6.2m, a top film spacing between the inner and outer films of 1-1.2m, and a skirt film spacing of 0.7-0. 9m; more preferably, the greenhouse has a span of 8m and a length of 60m. The top height is 5.7m, the distance between the top film and the inner film of the inner and outer film is 1m, and the distance between the skirt film is 0.8m.
The present disclosure further preferably hangs an IoT remote temperature and humidity collector at 1.5-2.0m from the ground in the periphery and the middle of the facility greenhouse to observe the temperature in the shed in real time by using the mobile phone
APP; and hang a remote temperature and humidity collector outside the shed to observe the temperature of the open field. To guide the film switch of the shed, more preferably, the distance of the remote temperature and humidity collector from the ground is 2.0m.
As an implementable manner, the structure of the double-film thermal insulation greenhouse of the present disclosure is shown in FIG. 1. FiG. 1 uses the assumed relative elevation, the eleva- tion unit is measured in “m’”, the size unit is measured in “em”, and the specified unit size of the material is measured in “mm”.
Regarding the opening and closing time of the shed film, the present disclosure includes the following steps: December-January: when the temperature is above 0°C during the day, open the shed film for ventilation at 8:00-15:00, and close inner and outer films of the greenhouse at 15:00-8:00; keep the temperature in the greenhouse above 0°C at night; February-March: open the top film of the inner film and the skirt film of the inner film from 8:00 to 2:00, open the outer film of the top film and skirt film of the outer film from 9:00 to 9:30 the outer film is closed at 13:00- 14:00, and the inner film is closed at 14:00-15:00; the tempera-
ture in the greenhouse is maintained at 10°C or more at night; in
April: when the temperature outside the greenhouse is lower than 10°C, close the greenhouse for heat preservation; When the tempera- ture outside the greenhouse is higher than 10°C, open the outer 5 film of the greenhouse from 7:30-15:00, and close the outer film of the greenhouse from 15:00-7:30.
In the present disclosure, when the temperature of the green- house at night is lower than 0°C from December to January, it is heated by a heating facility to maintain the temperature in the greenhouse above 0°C to ensure that all young loguat fruits are not frozen and provide a guarantee for early maturity; February-March
When the temperature in the greenhouse is lower than 10°C at night, use heating facilities to maintain the temperature in the greenhouse above 10°C, so that the young fruit will develop early.
In the present disclosure, it is further preferred that the heat- ing facility is an electric fuel heater. More preferably, when the greenhouse temperature is lower than 0°C at night from December to
January, the setting temperature of the electric fuel heater is 5°C; when the temperature of the greenhouse at night from February to March is lower than 10°C, the setting temperature of the elec- tric fuel heater is 15°C As a possible implementation, the electric fuel heater of the present disclosure is a 50A-F electric power of 150W and an output power of 50KW.
Due to the opening and closing time of the shed film of the present disclosure, the time of film close in the shed is longer than that of the conventional shed, which causes the fruit in the shed to be in an environment with high humidity for a longer time, resulting in fruit diseases such as gray mold, scab, bacterial brown spot, fruit rust, etc. incidence rate increases. If preven- tion is not carried out, the commerciality of the fruits that are warmed to promote early will decrease, which will affect the bene- fits. Therefore, in the present disclosure, it is preferred to use 1000-1500 times solution of 40% pyrimethanil wettable powder and 50% iprodione WP to prevent and control blossom blight from Decem- ber to January; more preferably, use 1300 times solution of bepy- rimethan 40% wettable powder and 50% Iprodione wettable powder to control; more preferably, control once in mid-December and mid-
January. It is preferred to spray 5000-6000 times solution of 30% difenoconazole and 800-1000 times solution of 80% mancozeb from
February to February to prevent and control scab, bacterial brown spot and fruit rust; it is further preferred to control with 5500 times solution of 30% Difenoconazole solution and 900 times solu- tion of 80% mancozeb; more preferably once in mid-February and early March.
The technical solutions provided by the present disclosure will be described in detail below with reference to the embodi- ments, but they should not be understood as limiting the protec- tion scope of the present disclosure.
Comparative example 1
Open field cultivation, the small part of fruit and flowe can survive from freeze injure, and the development of young loquat fruit was lagged due to the low temperature in winter. Entering early April, when the night temperature is above 10 °C, the young loquat fruit grows quickly, and the mature period loguat fruit is from May 20 to June 5.
Comparative example 2 (1) Greenhouse structure: the double-film greenhouse is 8 me- ters in span and 60 meters in length; the roof height is 5.2 me- ters, the space between the inner and outer films of the top film is 0.6 meters, the space between skirt films is 0.6 meters, the space between the pillars of the greenhouse is 4m, and the space between arches is Im. The gutter thickness is 1.5mm. (2) Opening and closing time of the greenhouse film: from De- cember to March from 15:00 to 8:00 at night, the inner and outer films of the greenhouse are closed for heat preservation. Heating in this way; when the temperature outside the shed during the day is above 0°C, open the shed film for ventilation from 8:00-15:00.
There will be no heating at night from February to March.
The greenhouse can only resist 20cm of snow, and the maturity period of loquat is from April 26 to May 10.
Example 1 "Ninghaibai” loquat in double-film insulation facility loquat garden.
(1) Greenhouse structure: the double-film greenhouse is 8 me- ters in span and 60 meters in length; the roof height is 5.7 me- ters, the distance between the inner and outer films of the top film is 1 meter, the distance between skirt films is 0.8 meters, the distance between the pillars of the greenhouse is 3m, and the distance between arches is 0.8m. The gutter thickness is 2.5mm.
Hang an IoT remote temperature and humidity collector (model S10A) at a height of 2m above the ground around the greenhouse to ob- serve the temperature in the greenhouse in real time by the mobile phone APP. A remote temperature and humidity collector is also hung outside the shed to observe the temperature outside the shed. (2) From December to January during the low temperature peri- od, the greenhouse is heated and antifreeze: from 15:00 to 8:00 at night, the inner and outer films of the greenhouse are sealed for insulation; when the temperature outside the shed during the day is above 0°C, open the shed film for ventilation from 8:00 to 15:00. Heating is performed when the temperature in the shed at night drops to 0°C. The heating equipment uses a 50A-F electric power of 150W and an output power of L0KW electric fuel heater.
The heating temperature is set to 5°C. Stop heating when the tem- perature outside the shed is at 0°C in the morning, keep the tem- perature in the shed above 0°C to ensure that all the young fruits of the loquat are not injured by frozen. (3) From February to March in early spring, warming in the greenhouse promotes early development of young fruits: 8:00 open the top film and skirt film of the inner film, 9:00-9:30 open the top film and skirt film of the outer film; 14:00 in the afterncon close the outer film and close the inner film at 15:00; heating at night: heating is performed when the temperature in the shed at night drops below 10°C, and the heating temperature is set at 15°°C. (4) Start greenhouse management during the maturity period in
April: when the temperature is higher than 10°C, the inner and out- er films will open at 7:30-15:00, and the outer film will be closed at 15:00-7:30; if the temperature is lower than 10°C, close both of inner and outer films.
(5) Disease prevention and control technology for heating, antifreezing and accelerating early: In mid-December and mid-
January, 1300 times pyrimethanil 40% wettable powder and 50% iprodione wettable powder were used to control blossom blight re- spectively; Spray 30% difenoconazole 5500 times and 80% mancozeb 900 times respectively in mid-February and early March to control scab, bacterial brown spot and fruit rust. (6) Effect: The maturity period of the facility loquat is from late March to mid-April, which is 40-50 days earlier than the open field maturity period, and 20-30 days earlier than the ordi- nary double-film facility cultivation.
Example 2 "Ninghaibai" loguat double-film insulation facility loquat garden. (1) Greenhouse structure: the double-film greenhouse has a span of 7.5 meters and a length of 50 meters; the roof height of the greenhouse is © meters, the space between the inner and outer films of the roof is 1.1 meters, the space between skirt films is 0.7 meters, the space between the pillars of the greenhouse is 3.2m, and the space between arches is 0.6m. The gutter thickness is 3.0mm. Hang an IoT remote temperature and humidity collector (model S10A) at a height of 1.5m from the ground around the green- house to monitor the temperature in the shed in real time from the mobile phone APP. A remote temperature and humidity collector is also hung outside the shed to observe the temperature outside the shed. (2) From December to January during the low temperature peri- od, the greenhouse is heated for antifreeze: from 15:00 to 8:00 at night, the inner and outer films of the greenhouse are sealed for insulation; when the temperature outside the shed during the day is above 0°C, open the shed film for ventilation from 8:00 to 15:00. Heating is performed when the temperature in the shed at night drops to 0°C. The heating equipment uses a 50A-F electric power of 150W and an output power of 50KW electric fuel heater.
The heating temperature is set to 5°C. Stop heating when the tem- perature outside the shed is at 0°C in the morning and keep the temperature in the shed above 0°C to ensure that all the young fruits of the loquat are not frozen. (3) From February to March in early spring, warming in the greenhouse promotes the early development of young fruits: 8:00 open the top film and skirt film of the inner film, , 2:00-9:30 open the top film and skirt film of the outer film; 14:00 in the afternoon close the outer film and close the inner film at 15:00; heating at night: heating is performed when the temperature in the shed at night drops below 10°C, and the heating temperature is set at 15°C. (4) Start greenhouse management during the maturity period in
April: when the temperature is higher than 10°C, the inner and out- er films will open at 7:30-15:00, and the outer film will be closed at 15:00-7:30; if the temperature is lower than 10°C, close both films. (5) Disease prevention and control technology for heating, antifreezing and accelerating early: In mid-December and mid-
January, respectively, use 1000 times solution of pyrimethanil 40% wettable powder and 50% iprodione wettable powder to control blos- som blight in mid-December and mid-January; Spray 30% difenocona- zole 5000 times and 80% mancozeb 800 times solution respectively in mid-February and early March to control scab, bacterial brown spot and fruit rust. (6) Effect: The maturity period of the facility loquat is from late March to mid-April, which is 40-50 days earlier than that in the open field maturity period, and 20-30 days earlier than that in the ordinary double-film facility cultivation.
Example 3 "Ninghaibai" loguat double-film insulation facility loquat garden. (1) Greenhouse structure: the double-film greenhouse has a span of 8.5 meters and a length of 55 meters; the roof height of the greenhouse is 6.2 meters, the space between the inner and out- er films of the roof film is 1.2 meters, the space between skirt films is 0.9 meters, the space between the pillars of the green- house is 3.5m, and the space between arches is 0.7m. The gutter thickness is 2.7mm. Hang an IoT remote temperature and humidity collector (model S10A) at a height of 1.8m from the ground around the greenhouse to observe the temperature in the shed in real time by the mobile phone APP. A remote temperature and humidity collec- tor is also hung outside the shed to observe the temperature out- side the shed. (2) From December to January during the low temperature peri- od, the greenhouse is heated for antifreeze: from 15:00 to 8:00 at night, the inner and outer films of the greenhouse are sealed for insulation; when the temperature outside the shed during the day is above 0°C, open the shed film for ventilation from 8:00 to 15:00. Heating is performed when the temperature in the shed at night drops to 0°C. The heating equipment uses a 50A-F electric power of 150W and an output power of L0KW electric fuel heater.
The heating temperature is set to 5°C. Stop heating when the tem- perature outside the shed is at 0°C in the morning and keep the temperature in the shed above 0°C to ensure that all the young fruits of the loquat are not frozen. (3) From February to March in early spring, warming in the greenhouse promotes the early development of young fruits: 8:00 open the top film and skirt film of the inner film, 9:00-9:30 open the top film and skirt film of the outer film,; 14:00 in the af- ternoon close the outer film and close the inner film at 15:00; heating at night: heating is performed when the temperature in the shed at night drops below 10°C, and the heating temperature is set at 15°C. {4) Start greenhouse management during the maturity period in
April: when the temperature is higher than 10°C, the inner and out- er films open at 7:30-15:00, and close the outer film at 15:00- 7:30; if the temperature is lower than 10°C, close both of films. (5) Disease prevention and control technology for heating, antifreezing and accelerating early: In mid-December and mid-
January, 1500 times pyrimethanil 40% wettable powder and 50% iprodione wettable powder were used to control blossom blight re- spectively; Spray 30% difenoconazole 6000 times and 80% mancozeb 1000 times respectively in mid-February and early March to control scab, bacterial brown spot and fruit rust. (6) Effect: The maturity period of the facility loquat is from late March to mid-April, which is 40-50 days earlier than the open field maturity period, and 20-30 days earlier than the ordi- nary double-film facility cultivation.
The above are only the preferred embodiments of the present disclosure. It should be pointed out that for those of ordinary skill in the art, improvements and modifications can be made with- out departing from the principle of the present disclosure, and these improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims (7)

CONCLUSIESCONCLUSIONS 1. Werkwijze om te voorkomen dat loquat-fruit uit de kas vries- schade ontwikkelt bij extreem lage temperaturen en om vroege rij- ping te bevorderen, waarbij deze de volgende stappen omvat: december tot januari: wanneer de temperatuur overdag boven 0 °C is, het openen van de kasfolie voor ventilatie om 8:00 tot 15:00, het sluiten van de binnen- en buitenfolie van de kas van 15:00 tot 8:00; het houden van de temperatuur in de schuur 's nachts boven 0 °c; februari tot maart: het openen van de bovenfolie en wandfolie van de binnenfolie van de kas van 8:00 tot 9:00 uur, het openen van de bovenfolie en wandfolie van de buitenfolie van de kas van 9:00 tot 9:30 uur, het sluiten van de buitenfolie tussen 13:00 tot 14:00 uur, het sluiten van de binnenfolie tussen 14:00 tot 15:00 uur; het houden van de temperatuur in de kas 's nachts boven de 10 °C; april: de temperatuur buiten de schuur is lager dan 10 °C en de schuur is gesloten voor isolatie; wanneer de temperatuur buiten de schuur hoger is dan 10 °C, het openen van de binnen- en buitenfo- lie van de kas van 7:30 tot 15:00 uur, en het sluiten van de bui- tenfolie van de kas van 15:00 tot 7:30 uur.1. Method to prevent greenhouse loquat fruit from developing freeze damage at extremely low temperatures and to promote early ripening, comprising the following steps: December to January: when the daytime temperature is above 0 °C , opening the greenhouse foil for ventilation at 8:00 AM to 3:00 PM, closing the inner and outer foil of the greenhouse from 3:00 PM to 8:00 AM; keeping the temperature in the shed above 0 °C at night; February to March: opening the top foil and wall foil of the inner foil of the greenhouse from 8:00 AM to 9:00 AM, opening the top foil and wall foil of the outer foil of the greenhouse from 9:00 AM to 9:30 AM, closing the outer foil between 13:00 and 14:00, closing the inner foil between 14:00 and 15:00; keeping the temperature in the greenhouse above 10 °C at night; April: the temperature outside the shed is below 10 °C and the shed is closed for insulation; when the temperature outside the shed exceeds 10 °C, opening the inner and outer foil of the greenhouse from 7:30 am to 3:00 pm, and closing the outer foil of the greenhouse from 3:00 pm: 00 to 7:30 am. 2. Werkwijze volgens conclusie 1, waarbij wanneer de temperatuur van de kas 's nachts van december tot januari lager is dan 0 °C, verwarming door verwarmingsinrichtingen om de temperatuur in de kas boven 0 °C te houden.A method according to claim 1, wherein when the temperature of the greenhouse is lower than 0°C at night from December to January, heating by heating devices to keep the temperature in the greenhouse above 0°C. 3. Werkwijze volgens conclusie 1, waarbij wanneer de temperatuur van de kas 's nachts van februari tot maart lager is dan 10 °C, verwarming door een verwarmingsinrichting om de temperatuur in de kas boven 10 °C te houden.The method according to claim 1, wherein when the temperature of the greenhouse is lower than 10°C at night from February to March, heating by a heating device to keep the temperature in the greenhouse above 10°C. 4. Werkwijze volgens conclusie 2 of 3, waarbij de verwarmingsin- richting een elektrische brandstofverwarmer is.A method according to claim 2 or 3, wherein the heating device is an electric fuel heater. 5. Werkwijze volgens conclusie 1, waarbij de kas een overspanning heeft van 7,5 - 8,5 m, een lengte van 50 - 60 m, een tophoogte van 5,7 - 6,2 m, een bovenste folieruimte van de binnen- en buitenfo- lies 1 - 1,2 m is, en een wandfolieruimte 0,7 - 0,92 m is.A method according to claim 1, wherein the greenhouse has a span of 7.5 - 8.5 m, a length of 50 - 60 m, a top height of 5.7 - 6.2 m, an upper foil space of the inner and outer foils is 1 - 1.2 m, and a wall foil space is 0.7 - 0.92 m. 6. Werkwijze volgens conclusie 1 of conclusie 5, waarbij een ruim- te tussen de pilaren van de kas 3 - 3,5 m is, een ruimte tussen bogen 0,6 - 0,8 m is en een gootdikte 2,5 - 3,0 mm is.A method according to claim 1 or claim 5, wherein a space between the pillars of the greenhouse is 3 - 3.5 m, a space between arches is 0.6 - 0.8 m and a gutter thickness is 2.5 - 3 .0 mm. 7. Werkwijze volgens conclusie 1, waarbij deze verder het gebruik omvat van 1000 - 1500 maal pyrimethanil 40% bevochtigbaar poeder en 50% iprodion bevochtigbaar poeder om bloemoor grauwe schimmel te bestrijden van december tot januari.The method of claim 1, further comprising using 1000-1500 times pyrimethanil 40% wettable powder and 50% iprodione wettable powder to control flower ear gray mold from December to January.
NL2030034A 2021-12-03 2021-12-03 Method for preventing greenhouse loquat fruit from freezing injure at extreme cold temperature and promoting early ripening NL2030034B1 (en)

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