Currently in the hot season of tomato production, if farmers do not understand the relevant management techniques, blindly relying on subjective awareness for tomato production management will often result in greater losses. Should pay attention to "a drop of two defenses":
1, spray water cooling
When the temperature is high, the edges of the leaves are burned. When the chlorophyll is faded, the entire leaf will dry up. The prevention method is: while using the shade net, sprayer can also be used to spray water to cool down. Especially at 11:00-14:00 noon, note that when the temperature is higher than 35 °C or 40 °C high temperature for 4 hours in a timely manner to take measures to cool down. Prevention of stem and leaf damage and fruit abnormalities.
2, prevent and drop flowers and fruits
If the daytime temperature is too high, exceeds 34°C, stays above 20°C during the night, or continues to heat at 40°C during the day for up to 4 hours, the style elongation is significantly higher than the barrel, causing the ovary to shrink, resulting in failure of normal pollination and fertilization Falling flowers and falling fruit. Prevention methods include:
(1) The use of formula fertilization techniques to prevent the use of nitrogen fertilizer.
(2) The watering should be done with a small amount of water to avoid flooding and ensure the coordination of moisture and temperature.
(3) When the pollination is poor, auxin spray can be used, such as 2,4-D, etc., as required to spray or wipe flowers.
3, to prevent 2,4-D injury
The use of 2,4-D flowers has become a popular method, but often some farmers have poor concentrations and cause crop damage. The concentration ratio is: the temperature after planting is 15-20°C, and the concentration is 10-15 mg/kg (that is, 1 ml of 1.5 % 2,4-D plus 1 kg of water is dubbed 15 mg/kg, plus 1.5 kg of water. To 10 mg/kg). After the temperature rises, it can be reduced to 6-8 mg/kg. Note: When used, prevent direct exposure to tender shoots or leaves; spray is strictly forbidden; if large amount of flowers in the field can be used to prevent spraying 25-40 mg / kg spray.
Mushrooms
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