Common Broom

Brooms are a group of evergreen, semi-evergreen, and deciduous shrubs in the subfamily Faboideae of the legume family Fabaceae, mainly in the two genera Cytisus and Genista, but also in five other small genera (see box, right). All genera in this group are from the tribe Cytiseae. These genera are all closely related and share similar characters of dense, slender green stems and very small leaves, adaptations to dry growing conditions. Most of the species have yellow flowers, but a few have white, orange, r ...

Read more here: » Broom shrub: Encyclopedia - Broom shrub

GDD are calculated by taking the average of the daily high and low temperature each day compared to a baseline (usually 10 °C). As an equation; GDD=(((High+Low)/2)-Baseline) GDDs are typically measured from the winter low. For example, a day with a high of 23 °C and a low of 12 °C would contribute 7.5 GDDs. Any temperature below the baseline is set to the baseline before calculating the average. For example, a day with a high of 13 °C and a low of 7 °C would still contribute 1.5 GDDs. Likewise, the maximum temperature is usually ...

See also:

Growing degree day, Growing degree day - GDD calculation, Growing degree day - Plant development, Growing degree day - Insect development and pest control, Growing degree day - Baselines

Read more here: » Growing degree day: Encyclopedia II - Growing degree day - GDD calculation

Growing degree days are also used by some farmers to time their use of pest controls so they are applying the treatment at the point that the pest is most vulnerable. For example: Black cutworm larvae have grown large enough to start causing economic damage at 165 GDD Azalea Lace Bug emerges at about 130 GDD Boxwood leaf miner emerges at about 250 GDD Several beekeepers are now resea ...

See also:

Growing degree day, Growing degree day - GDD calculation, Growing degree day - Plant development, Growing degree day - Insect development and pest control, Growing degree day - Baselines

Read more here: » Growing degree day: Encyclopedia II - Growing degree day - Insect development and pest control

10 °C is the most common base for GDD calculations, however, the optimal base is often determined experimentally based on the lifecycle of the plant or insect in question. 5.5 °C wheat, barley, rye, oats, flaxseed, lettuce, asparagus 6 °C stalk borer moth 7 °C Corn Rootworm 8 °C sunflower, potato 9 °C Alfalfa weevil 10 °C maize (including sweet corn), sorghum, rice, soybeans, tomato, Black cutworm, European Corn Borer, standard baseline for insect and mite pests of woody plants ...

See also:

Growing degree day, Growing degree day - GDD calculation, Growing degree day - Plant development, Growing degree day - Insect development and pest control, Growing degree day - Baselines

Read more here: » Growing degree day: Encyclopedia II - Growing degree day - Baselines