Posts Tagged: Thomas

Fire Recovery and Frost Refresher

University of California Cooperative Extension, USDA Farm Service Agency, California Avocado Commission and California Avocado Society

Fire Recovery and Frost Refresher

Santa Paula Agricultural Museum, 926 Railroad Ave, Santa Paula

January 10, 9 – 11 AM, Wednesday

 

Introduction – Ben Faber, UCCE

Fire Damage to Santa Barbara and Ventura County Agriculture – Henry Gonzales, VC Ag Commissioner

Damage to Avocado Orchards – Ken Melban, CAC

Disaster Resources Available from USDA – Farm Service Agency – Daisy Banda, USDA- FSA

Assessing Fire and Frost Damage and Recovery Practices – Ben Faber

Fire Loss Calculator – Eta Takele, UCCE

Fire Experiences – What Works, What Doesn't and What Might – Grower Panel

 

Representatives from Ventura and Santa Barbara Agriculture Commissions will be present

 

FSA will be present from 8-12 to take Disaster Applications

 

Refreshments will be served.

For information contact: Ben Faber (805)645-1462

The University of California prohibits discrimination against or harassment of any person employed by or seeking employment with the University on the basis of race, color, national origin, religion, sex, physical or mental disability, medical condition (cancer-related or genetic characteristics), ancestry, marital status, age, sexual orientation, citizenship, or status as a covered veteran (special disabled veteran, Vietnam-era veteran or any other veteran who served on active duty during a war or in a campaign or expedition for which a campaign badge has been authorized).

University Policy is intended to be consistent with the provisions of applicable State and Federal laws.

Inquiries regarding the University's nondiscrimination policies may be directed to the Affirmative Action/Staff Personnel Services Director, University of California, Agriculture and Natural Resources, 300 Lakeside Dr., 6th Floor, Oakland, CA 94612-3550 (510) 987-0096.

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USDA Fire Loss Programs

USDA's Farm Service Agency (FSA) offers disaster assistance and low-interest loan programs to assist agricultural producers in their recovery efforts following wildfires or other qualifying natural disasters. Available programs and loans include:

 

• Non-Insured Crop Disaster Assistance Program (NAP)

 

1. - provides financial assistance to producers of non-insurable crops when low yields, loss of inventory, or prevented planting occur due to natural disasters including excessive wind and qualifying drought (includes native grass for grazing). Eligible producers must have purchased NAP coverage for 2017 crops. A notice of loss must be filed within 15 calendar days of when the loss is apparent or 15 calendar days after the normal harvest date.

 

• Livestock Indemnity Program (LIP)

 

1. - offers payments to eligible producers for livestock death losses in excess of normal mortality due to adverse weather. Eligible losses may include those determined by FSA to have been caused by hurricanes, floods, blizzards, wildfires, tropical storms, tornados lightning, extreme heat, and extreme cold. Producers will be required to provide verifiable documentation of death losses resulting from an eligible adverse weather event and must submit a notice of loss to their local FSA office within 30 calendar days of when the loss of livestock is apparent.

 

• Tree Assistance Program (TAP)

 

1. – provides assistance to eligible orchardists and nursery tree growers for qualifying tree, shrub and vine losses due to natural disasters including excessive wind and qualifying drought.
   
   

 

• Emergency Assistance for Livestock, Honeybees, and Farm-Raised Fish Program (ELAP)

 

1. - provides emergency relief for losses due to feed or water shortages, disease, adverse weather, or other conditions, which are not adequately addressed by other disaster programs. ELAP covers physically damaged or destroyed livestock feed that was purchased or mechanically harvested forage or feedstuffs intended for use as feed for the producer's eligible livestock. In order to be considered eligible, harvested forage must be baled; forage that is only cut, raked or windrowed is not eligible. ELAP also covers up to 150 lost grazing days in instances when a producer has been forced to remove livestock from a grazing pasture due to wildfire and for beekeepers, ELAP covers beehive losses (the physical structure) in instances where the hive has been destroyed by a natural disaster including flooding, high winds and tornadoes. Producers must submit a notice of loss to their local FSA office within 30 calendar days of when the loss is apparent.

 

• Emergency Loan Program

 

1. – available to producers with agriculture operations located in a county under a primary or contiguous Presidential or Secretarial disaster designation. These low interest loans help producers recover from production and physical losses.

 

• Emergency Conservation Program (ECP)

 

1. - provides emergency funding for farmers and ranchers to rehabilitate land severely damaged by natural disasters; includes fence loss.

 

• HayNet

 

1. - is an Internet-based Hay and Grazing Net Ad Service allowing farmers and ranchers to share ‘Need Hay' ads and ‘Have Hay' ads online. Farmers also can use another feature to post advertisements for grazing land, specifically ads announcing the availability of grazing land or ads requesting a need for land to graze. www.fsa.usda.gov/haynet.
   
   

www.fsa.usda.gov/disaster

For more information on these programs, visit FSA online at www.fsa.usda.gov.

 

To find a local FSA office near you, visit

http://offices.usda.gov.

 

USDA is an equal opportunity lender, provider and employer.

fire NRCS damage

NASA's look at the difference of a few days in the Thomas Fire

What a difference a few days can make in the life cycle of a fire. In this particular case, the Thomas Fire that is ongoing in the Ventura County around (and surrounding) in Southern California. The following images were taken by the Terra and Aqua satellites on Dec. 16, 17, and 19, 2017, and during those times fire conditions improved visibly. A difference in winds, in humidity, in the ability of firefighters to control the fire's perimeter, and in the amount of fuel left for the fire to consume can bring a raging fire to heel. This does not mean the fire cannot gain strength again if conditions worsen, but it is heartening to realize that weather conditions can allow firefighters to get a better handle on events as they have in the last few days.

This the the Thomas Fire on December 16, 2017 as seen by the Terra satellite. There were multiple areas of "hot spots" where the satellite indicates the fire is and where telltale smoke also pinpoints fire spots. These areas are numerous and the clouds of smoke coming off the flames are all consuming.

By December 17, 2017, conditions had obviously changed for the better and the fires were able to be somewhat contained. This image taken by the Aqua satellite on December 17, 2017, shows a much more subdued Thomas Fire. There are still hot spots visible but the number has vastly improved.

By December 19, 2017, hot spots are not showing up via satellite instruments. This does not mean the fire is completely out, but large hot spots are no longer detected by satellites. So, too, the copious smoke that was spewing from the fires is no longer in evidence. This Aqua image shows a much calmer landscape due to improving weather conditions at the time.

Per Inciweb today, the Thomas fire is 60 percent contained at present. At 272,000 acres, the Thomas Fire is now the second largest fire in the recorded history of the state of California. Unfortunately, weather conditions that allowed the fire to be contained to the 60 percent mark are destined to change as weather conditions deteriorate this afternoon. Inciweb reports that a forecasted strong north wind event will bring wind conditions similar to those experienced when the fire made its push into Montecito. With the introduction of these winds, critically dry fuels will be highly receptive to fire spread. During Santa Ana wind events three things happen: the weather warms, winds pick up, and humidity drops precipitously. All of these events promote fire growth. The Thomas Fire has experienced winds exceeding 70 miles per hour, temperatures in the mid 80's and humidity below 10 percent.

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NASA image courtesy NASA Worldview application operated by the NASA/Goddard Space Flight Center Earth Science Data and Information System (ESDIS) project. Caption by Lynn Jenner with information from Inciweb.

Afer the Fire, Replant or Field Graft?

This is from past experience, and is still relevant.  Availability of replant trees is a major issue to consider at this point.

The wildfires in San Diego and Ventura Counties during the fall of 2003 were certainly devastating to many avocado groves adjacent to burning native chaparral. Many of the avocado trees were singed in the canopy without extensive damage to the large scaffold branches; these trees will re-grow new foliage with some relatively minor pruning to clear out smaller dead branches. However, other groves have had extensive damage, complete with charring of the bark in the trunk and boiling of the sap through the bark of the trunk. In these cases, the sap became hot enough to steam the cambium layer (the layer of living cells just beneath the bark), killing the tree above the soil line.

In the latter case, the tree above the soil line is dead, but the roots are still alive. Beginning about the first of March 2004, we have noticed that many of these trees are sending up rootstock suckers near the trunk. If left to grow un-grafted, these suckers will become an avocado tree, but not a known cultivar. The question is: should these burned trees be removed and replanted with a new tree? Or should a sucker be tip-grafted back to a known cultivar?

Sucker grafting in avocado is a well-known practice and has been used extensively in the industry when a grower desired to change cultivars. Generally, the tree is cut down leaving a threefoot stump, which is used as a stake for the new tree. A strong sucker growing from the base of the tree is selected (the sucker should be about 3/4 to 1" in diameter and stiff, not rubbery), and the other smaller suckers should be removed. The sucker is cut with a horizontal cut about 6-8" above the soil line, a 2”vertical slit is made down through the center of the sucker, and 3" to 4" long piece of budwood, cut like an arrowhead at the bottom end, is slipped into the slit, matching the cambium layers together on at least one side, and preferably on both sides. The graft is wrapped tightly with grafting tape, and the entire budstick is wrapped with Parafilm to prevent moisture loss, and grafting tape is used to tie the new grafted sucker to the stump (used as a stake).

Advantages from sucker grafting (as opposed to planting a new tree).

• Sucker grafting is cheaper. As recently quoted by a grafter in Fallbrook, sucker grafting usually costs about $2 per tree after the tree has been cut down to a 3 foot stump. If the grafter supplies the budwood and grafting tape, the price will probably be $2.50 per tree. If the grafter has to travel away from Fallbrook, the price will be higher according to the distance traveled. A new replacement tree will cost about $14 on a seedling rootstock, or $19-22 on a clonal rootstock. The labor cost for planting the new tree would be about $2.00 per tree. These costs do not include cutting down the older burned tree, or follow-up care for the young tree.
• The older, burned avocado tree has an extensive root system with a lot of stored energy. When the sucker graft begins to grow it usually grows very rapidly, much faster than a young replant tree. The sucker grafted tree should start to set fruit two years after grafting.

Disadvantages from sucker grafting.

• We are assuming that the sucker-grafted tree is healthy and does not have root rot or some other disease. If the older tree has root rot, it would be better to remove the old tree and replant with a new tree grown on one of the newer root-rot tolerant clonal rootstocks.
• In the system described above, the trunk is used as a stake. When the new tree grows enough to be selfsupporting, the old stump should be cut down close to the ground. The stump should be slightly sloped to drain water away from the new tree. This takes some careful chainsaw work.
• Suckers. Until the new tree gains strength and starts to shade the old stump, there will be other suckers emerging. These must be removed or they will take over and shade the grafted sucker.

avocado suckers

Assessing Fire Damaged Avocado Trees

The destruction after a fire can be pretty gruesome and sad. Many times, though the fire moves through the orchard so fast that, even though the canopy has turned brown, there is a good chance the trees can come back. It all depends on how much damage has been done to the trunk. If the fire has substantially damaged the base of the trunk, it is unlikely to come back, even if the canopy is still green. That is the saddest thing, because you think you've dodged the bullet, but if the trunk is too damage, the canopy collapses gradually over a few weeks. However, the canopy may look a goner, but if the trunk is still intact, the tree will come back and may still be as productive as before.

The thing to look for at the base of the trunk is the discoloration. If it's black, it's probably not coming back. However, it can come back if after a few weeks you don't see the pencil-sized cankers that indicate that the sap has bubbled to the surface (see photo 1 below). If after a few weeks, the trunk is still clear of those bubbles (photo 2), even though the canopy looks gone, it is quite likely to come back.

It's also possible that the trunk may be damage in just one part of the trunk and not on the rest. In this case, it can also come back. The problem with these ones, is that they may come back and given enough time will be good trees again. But if they haven't recovered enough and there's a sudden heat spell, they may go down suddenly as if they had been burned again. That's the way they will look, like they have been burned again. Given enough time, though the avocado will grow from good areas to cover the poor areas and the tree may be productive again.

Avocados are amazing in their ability to recover.  Eucalyptus can do it.  But you singe the trunk of a lemon, and good-bye lemon.

Fire Information:

http://ceventura.ucanr.edu/Agricultural_Threats/Fire_Information/

Photo 1. Trunk damage with "boils" appearing indicating damaged green tissue below.

Photo 2. Heat damaged canopy but clear trunk with no damage.

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fire 2

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