LP2096 | LP937 | LA902 @ 42 DAT| Panicle Formation to Booting Stage

Описание: Booting
During the booting stage of rice growth, the many components of a panicle mature within the protective sheath of the flag leaf. This sheath represents the boot. Three distinct stages of rice booting are defined by how much of the flag leaf sheath is visible above the penultimate leaf’s collar:

Early boot. Starts from the moment a flag leaf’s collar is visible until it’s around 2 inches (5 cm) above the collar of the preceding leaf.
Middle boot. The flag leaf’s collar shows up 2–5 inches (5–13 cm) above the preceding leaf’s collar.
Late boot. The flag leaf’s collar shows up for a minimum of 5 inches (13 cm). As there’s an active growth of panicles by now, the boot swells, earning the name “swollen boot” for this growth stage. Environmental stresses on rice may now diminish grain yields.
During the booting stage of rice growth, apply propiconazole or other triazole fungicides to protect the rice crop from kernel and false smut.

Inflorescence Emergence, Heading
The heading stage of rice growth begins once the panicle commences to emerge from the flag leaf’s bottom. Because tiller maturity varies, the heading of all plants in the field may take up to two weeks. The agronomical term “heading date” typically refers to the moment when half of the panicles have partially risen from the boot. This is not the same as the rice being “headed,” which occurs when all of the panicles have fully emerged. Keep in mind that some panicles may fail to fully exsert.

Long-lasting sunlight deprivation in the three-week period before and after the rice heading stage might reduce panicle emergence and hinder grain filling.
The typical duration between the heading and flowering growth stages is about two days. Variations in solar radiation, temperature, and humidity can cause significant changes in this duration. For example, when there is plenty of sunlight, it can be shortened to just one day. On the other hand, when it’s rainy and cloudy, it can be extended to 5–7 days.