CONSIDERATIONS ON THE PROTECTION OF VINEYARDS AND ORCHARDS AGAINST HOAR AND FROST
No matter how favourable the light and humidity conditions may be, plant growth stops when the air and leaf temperature drops below a certain minimum or exceeds a certain maximum value. When air temperatures drop below 0 °C, susceptible crops can be injured, with significant effects on production. Hoar and late frosts occur differently, there are areas where the number of days in the spring months with critical temperature drops are quite numerous, with a frequency in April and exceptionally during May. The negative effect is all the greater as it is recorded after a warm period which can cause an advance of the period of formation of flower buds and the appearance of flowers. The paper presents a series of considerations on the protection of orchards and vineyards against hoar and late frosts.
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