Could you please tell me exactly what applying dormant oil in the spring does for my fruit trees? Thanks.
Asked by Nicky Marrapodi 2 years ago.
Dormant oil is also called horticultural oil. Horticultural oils are lightweight oils, either petroleum or vegetable based. They are used in both horticulture and agriculture, where they are applied as a dilute spray on plant surfaces to control insects and mites. They are also sometimes included in tank mixes as a surfactant. The oils provide control by smothering(suffocting by cutting off the oxygen or air supply) the target pests, and are only effective if applied directly to the pest, and provide no residual controls. Oils are generally considered suitable for 'organic pest control', with most oils permitted under the US National Organic Program.( organic pest control means control of the pests with out using harmful chemicals that are potentially hazardous to man ) 1)Dormant Oils are oils used on deciduous plants during abscission. (The meaning of abscission is -- The act of cutting off. OR in Botany== The shedding of leaves, flowers, or fruits following the formation of the abscission zone.) 2)Summer oils are also referred to as foliar oils, a name which alludes to their use on plants when the foliage is present on the tree or plant . Answered by Candace Tavolieri 2 years ago.
it suffocates the insect eggs that were left there last yr. it is one of the most important sprays of the yr Answered by Tasia Liggins 2 years ago.
i don't know, ask jeeves Answered by Delphia Luy 2 years ago.
Why don't evergreen trees go dormant?
I know that deciduous trees go dormant in the winter to conserve energy or water, but why do evergreens not have to go dormant in the winter.
Asked by Mabel Schoelman 2 years ago.
They do go dormant just without the drama of complete canopy loss. Temperate climate plants, even evergreens, need a dormant or rest period that is activated by decreasing period of day length & cooler temperatures. Trees enter dormancy when the whole tree carbon balance shifts. They can no longer make enough food from photosynthesis to support active growth in all parts. Also if the area gets freezing temperatures they have to protect themselves from ice crystals rupturing their cells. When a plant cell freezes, it does what a frozen water pipe does: it bursts. For growth to continue there must be more daylight to generate photosynthate (carbohydrate) than the plant requires to support its basic metabolism (growth below ground and in the stems or woody parts plus reserves for spring bud break). With less light and a decrease in temperature to between 5 & 10 C (40-50 F) the tree struggles to support foliage. So there is a break-even point between available light energy and temperature that predicts actual canopy shut down but the plant continues to live and respiration continues to support this minimal function. Evergreens shut down for winter dormancy but mostly do not shed their leaves (needles). Instead they set up to continue these most basic metabolic functions and yet prevent possible damage from periodic freezing; the plants super-cool. Water in the cells is chemically maintained in a liquid state below 0° C (32F) but above the homogeneous nucleation point at -38.1° C. (-37F) So these plants avoid cold damage by not freezing. This is like adding antifreeze to the car's radiator water. However if the temperature goes below -38.1° C they will freeze. So this first antifreeze method is only good for zones 3 or higher. They go through further steps in colder areas to prevent freeze damage. however all evergreens are at risk of desiccating. Trees in a dormant condition, even without leaves, lose water. They lose water through lenticels on twigs, branches, roots, and stems so those retaining leaves (needles) when dormant suffer greater water loss. Answered by Venus Echave 2 years ago.
When Do Trees Go Dormant Answered by Norma Lingberg 2 years ago.
What is the example of a dormant seed?
an example of a dormant seed---------??
Asked by Berna Moricle 2 years ago.
A dormant seed is one which is alive, but does not germinate when provided with ample water, good aeration and a suitable temperature (i.e. the normal requirements for plant growth). Virtually all tree seeds are dormant: •Some are described as deeply dormant - they are completely unable to germinate until pretreated. •Some are described as shallowly dormant - they only germinate slowly and over a narrow range of conditions until pretreated. •Some are described as hard-seeded - they do not germinate until their impermeable seed coat has been pretreated. More in link. Answered by Donovan Teteak 2 years ago.
A dormant seed is just one that has not germinated yet because the conditions are not right. Seeds you buy at the store to grow later are an example of dormant seeds. Answered by Marilee Baugus 2 years ago.
A seed that has not germinated is dormant seed. All pulses are dormant seeds. Answered by Liberty Rottenberg 2 years ago.
Examples Of Dormancy Answered by Aubrey Molla 2 years ago.