Ever wanted to raise praying mantids, butterflies, silkworm moths and other insects? Or arachnids...
Like to learn how to raise silkworm moths? Silkworm moth expert İsmail Şeker will show his new video about the silkworm moth life cycle at 3 p.m. at the Bohart Museum of Entomology open house. (Photo courtesy of İsmail Şeker)
Madagascar hissing cockroaches are a popular insect to rear. (Photo by Kathy Keatley Garvey)
A praying mantis, Stagmomantis limbata, depositing an egg case, an ootheca. (Photo by Kathy Keatley Garvey)
From Deakin University in Australia... ************* Hi, I currently have three industry funded...
The very fact that avocados can be grown in hard to get to places means that the trees are also in areas that are subject to wildfire damage. Recently several hundred acres of avocado burned in the foothills. The fire was fanned by high winds and low humidity.
Every year there are avocado trees that burn, either through careless attention to early morning fires that pickers build, wildfires or car accidents. A grower needs to be patient and observant to bring the trees back into production.
Although injury to foliage and young growth is visible within a few days of the fire, the full extent of the damage may not be known for several months or possibly the next growing season. In the case of severe injury, die-back may continue to occur for several months after the fire. New growth that occurs after the fire may suddenly collapse the following year when the growth is tested by Santa Ana conditions.
The important rule to follow after a fire is to do nothing - don't prune, don't fertilize and maybe don't water. Or rather, water very carefully. Dry winds may have sucked the water out of the ground and may need to be replenished. The fire may have burned the irrigation lines and need to be replaced.
The need to immediately replace irrigation systems will depend on the time of year, the extent of damage, the soil moisture after the fire, the weather forecast, labor availability and many other considerations. It is not terribly expensive to replace hoses, but if PVC sub mains have burned, it will be a big job and it may not be necessary to jump on their replacement. Check the soil and the tree status before rushing to replace an irrigation system. It is on the list of things to do, but maybe not tomorrow.
In the meantime, if the tree has been defoliated by the fire, it has lost its ability to transpire water. Watering a tree with no leaves will set up those conditions that are conducive to root rot. Until the tree begins to leaf out, watch soil moisture to decide how much water the trees are pulling out of the soil. The emitters should be capped or plugged on some leafless trees. Then as the tree puts on new growth, shallow, infrequent irrigations should start. This may mean replacing the 10 gph microsprinkler with a 1 gph dripper if only a portion of the orchard has been burned and the rest of the trees need their usual amounts and frequency of water.
The avocado has a tremendous ability to come back from fire and frost damage. However, the tree will tell you where it is coming back. It will start pushing growth where the tree is still healthy. It may take 3 to 6 months for this growth to occur.
Delay pruning until the tree clearly shows where it is going to regrow. By waiting, you save the expense of having to return sometime later to remove more wood and also will be able to save the maximum about of tree.
An activity the grower can perform is whitewashing. The defoliated tree can be further damaged by sunburn after it has lost its protective cover of leaves. The upper surface of horizontal limbs and the south sides of exposed trunks are the most affected. The whitewash can delay the appearance of new growth, but it does not affect total growth. There is usually no value in applying the whitewash to small limbs.
There are various commercial whitewashes on the market. The easiest to prepare is the cheapest white latex paint on the market mixed with water to the extent that it will go through a sprayer.
Avocado trees have a great ability to recover after fire damage. Even trees killed below the bud union will frequently develop into good trees if they are rebudded and given good care. Trees which do not put out vigorous sprouts should be removed. Interplanting avocados would rarely be advisable because of their rapid recovery.
For another version of fire recovery, go to: https://www.californiaavocadogrowers.com/cultural-management-library/post-fire-grove-recovery
Photos from Kevin Ball, firefighter/farmer
slow burn through orchard
watching the fire clear weeds
other side of the moon
water on the ashes
The emerald ash borer, a wood-boring beetle native to northeastern Asia and now invasive in much of...
Wright State biology professor Don Cipollini earlier discovered that the emerald green ash borer targets the white fringetree, Chionanthus virginicus, native to the savannas and lowlands of the southeastern United States. Later he and fellow researchers discovered it also infests an olive tree species. (Photo by Chris Snyder)
Larva of the emerald ash borer, Agrilus planipennis. (Photo courtesy of Pennsylvania Department of Conservation and Natural Resources)
California's working landscape and the industries associated with agriculture and natural resources contribute significantly to the state's economy, according to a new study by the California Community Colleges Centers of Excellence for Labor Market Research, California Economic Summit and the University of California's Division of Agriculture and Natural Resources.
“When people think of California's economy, they think of entertainment, information technology and other industries. They may not think of working landscape,” said Glenda Humiston, University of California vice president, agriculture and natural resources. “People may be surprised to learn that California's working landscape accounts for 6.4% of the state's economy, supports more than 1.5 million jobs and generates $333 billion in sales.”
To measure the economic impact of the working landscape, researchers from the Centers of Excellence, California Economic Summit and UC Agriculture and Natural Resources analyzed federal data associated with employment, earnings and sales income of the nine segments that are essential to the working landscape: agricultural distribution, agricultural production, agricultural processing, agricultural support, fishing, forestry, mining, outdoor recreation and renewable energy.
Their analysis of 2018 data from the North American Industry Classification System showed the value of the working landscape in California comes in ahead of the health care, real estate, retail and construction industries. The top five economic drivers were government (21.9%), manufacturing (10.2%), information (9.3%), professional, scientific and technical services (7.5%), and finance and insurance (6.4%).
The researchers found the nearly 70,000 businesses associated with the working landscape paid $85 billion to workers in 2018 and generated $333 billion in sales income. In terms of job numbers, earnings, sales income and number of establishments, four segments dominate: agricultural distribution, agricultural production, agricultural processing and agricultural support.
Agricultural production provides the greatest number of jobs, more than 325,000, and generates the second highest sales income, $61 billion in 2018. Although agriculture accounts for 79% of working landscape sales income, it is important to note that other working landscape segments are still sizeable when compared to the rest of the nation.
In addition to evaluating the contribution of the industries to the state's economy, the researchers measured the importance and impact of the nine working landscape segments by region. For example, some segments, although relatively small in terms of employment or sales income, are cornerstones of local economies and play a critical role in the livelihoods of communities.
The Los Angeles/Orange County region, the San Francisco Bay Area, and San Joaquin Valley have the greatest concentration of jobs for agricultural distribution, agricultural processing, agricultural support, mining and renewable energy. The San Joaquin Valley leads in agricultural production, followed by the Central Coast. Los Angeles/Orange County has the most forestry, fishing and outdoor recreation jobs.
This report does not include economic values for ecosystem services provided by California's working landscape such as clean water, nutritious food and a livable climate, or intangible goods that contribute to human well-being, such as recreation, aesthetic inspiration and cultural
To read the report “California's Working Landscape: A Key Contributor to the State's Economic Vitality,” visit http://ucanr.edu/WorkingLandscape. A one-page executive summary is available at http://bit.ly/2WTA7Vz.