- Author: Jennifer DeDora
The leaves of this unique-looking house plant really do look like the rind of a ripe watermelon. The stems are also reminiscent of the fruit-they are a rich red, just like the edible flesh of a ready-to-eat watermelon. I purchased this houseplant as a gift to myself, and I'm very happy I did. I was strolling through the houseplant section of a Davis store and just had to have it!
In my research on how to care for this plant, I discovered it is a bit like Goldilocks, and it likes everything “just right”. It thrives in soil that is not too wet nor too dry and needs sunlight that is abundant, but not too direct. The temperature of an air-conditioned house is ideal. Interestingly, it prefers to be a bit rootbound rather than in a container with abundant space, so pick a receptacle that is just the right size for the plant right now.
The cream-colored flowers that form during the summer months are simple, straight up and down, and pretty understated. The real attraction of this plant is its foliage. My Peperomia is thriving on my living room coffee table in a cute container I've been trying to fill with just the perfect plant for many years now. This Watermelon plant seems to be the one!
![photos by Jennifer DeDora photos by Jennifer DeDora](/blogs/blogcore/blogfiles/107387.png)
![watermelon peperomia 2 watermelon peperomia 2](/blogs/blogcore/blogfiles/107388.png)
![watermelon peperomia 3 watermelon peperomia 3](/blogs/blogcore/blogfiles/107389.png)
![watermelon peperomia 4 watermelon peperomia 4](/blogs/blogcore/blogfiles/107390.jpg)
![watermelon peperomia 5 watermelon peperomia 5](/blogs/blogcore/blogfiles/107391.jpg)
- Author: Ben A Faber
Hot off the internet, a new edition of Topics in Subtropics, articles from UC subtropical horticulture folks
Topics in Subtropics Volume 25 Spring 2024
Jul 9, 2024
Fatemeh Khodadadi, Editor
Topics in this issue:
- Effectiveness of Asian citrus psyllid management in huanglongbing treatment zones in residential Southern California
- Managed honeybees in a wet year
- Threats to citrus orchards in California by synergistic effects of dry root rot and phytophthora root and crown rot
- Microbial Safety in Avocado Farms
- How Much Fruit is Up there?
- Tiny Troublemakers: How Geminiviruses are affecting California's Crops
- Citrus Leprosis Disease – Staying alert on potential threat to California's citrus industry
Download (3,620KB PDF)
https://ceventura.ucanr.edu/Com_Ag/Subtropical/
AND THERE"S LOTS MORE TO READ FROM THE ARCHIVES
https://ceventura.ucanr.edu/Com_Ag/Subtropical/?newsletterlist=3197
![topics in sub masthead topics in sub masthead](/blogs/blogcore/blogfiles/107742.png)
- Author: Whitney Brim-DeForest
- Author: Luis Espino
- Author: Roberta Firoved
- Editor: Taiyu Guan
- View More...
At our last meeting, we had some questions about the approved uses of pendimethalin in California rice. There are several products labeled for use on rice with pendimethalin as the active ingredient. As of June 2024, pendimethalin registered products (on rice) include Prowl H2O, Prowl 3.3, Harbinger, Satellite Hydrocap, Stealth, Helena Pendimethalin, Pavilion H2O, Pavilion 3.3, and a few others. Please make sure to always check the product label, as not all pendimethalin products allow use for the below-listed timings. Furthermore, labels are updated regularly, so it should not be assumed that the same use pattern applies from season to season. For the most currently-registered products, refer to the California Department of Pesticide Regulation website, product label databases, as well as manufacturers' websites for reference. Please remember the container label is the deciding point for pesticide use enforcement.
The mode of action of pendimethalin is disruption of mitosis (WSSA Resistance Group 3). In California rice, there is no other herbicide registered with this mode of action. The herbicide binds to clay soils, with residual activity of between 1 to 4 months, depending on environmental conditions. Pendimethalin can be readily absorbed by young roots, and thus, weeds are controlled as they germinate. Damage can also occur to rice or other crops as they germinate. Weeds are not controlled by this product once emerged and established.
Labeled controlled weeds are: junglerice, barnyardgrass, and sprangletop. Barnyardgrass and sprangletop are the two most abundant grass weeds in dry- or drill-seeded California rice, also causing the most yield loss. Rotating with pendimethalin can help to manage herbicide-resistance biotypes, as well as preventing the selection of herbicide resistance in these species.
Pendimethalin Rice Timings (product-dependent):
Preflood, preemergence: In drill- or dry-seeded rice, pendimethalin can be applied to the soil surface AFTER rice has been dry-seeded and lightly incorporated or drill-seeded. The product should be tank-mixed with a safener adjuvant. Water should be flushed across the field AFTER herbicide application (within 7 days).
Delayed preemergence: NOT a currently labeled use for any pendimethalin product registered in California.
Early postemergence: Only for dry-seeded rice and into fields with no standing water. Pendimethalin is usually applied with a tank-mix partner. Timing should be based on the leaf stage of the rice or weeds as appropriate for the tank-mix partner. Field should be flooded or flushed within 7 days after application.
Postemergence: For water-seeded rice (California ONLY) between the 4-6 leaf stage. Field must be completely drained with no standing water at time of the pendimethalin application and should be reflooded within 7 days after application.
- Author: Kathy Keatley Garvey
When you venture into your pollinator garden, look for the beauty, color, diversity and the intensity that surrounds you. You will be astounded.
- A honey bee nectaring on lavender in a soft-pastel scenario.
- A katydid nymph crawling (backlit) on a blanketflower, Gaillardia.
- A Gulf Fritillary butterfly, Agraulis vanillae, nectaring on Lantana
- A praying mantis, Stagmomantis limbata, perched on a Cosmo
- A yellow-faced bumble bee, Bombus vosnesenskii, exiting a lavender patch.
You're the gardener, and you'll be using your garden tools...pruning shears, spade, trowel, garden fork, hoe, hand rake...
But another good garden tool--and an indispensable one--is the camera. You just never know when a buddy shows up in the garden...
![A honey bee nectars on lavender in a Vacaville garden. The soft pastel colors almost resemble a painting. (Photo by Kathy Keatley Garvey) A honey bee nectars on lavender in a Vacaville garden. The soft pastel colors almost resemble a painting. (Photo by Kathy Keatley Garvey)](/blogs/blogcore/blogfiles/107754.jpg)
![A katydid nymph crawls on a blanketflower, Gaillaria. (Photo by Kathy Keatley Garvey) A katydid nymph crawls on a blanketflower, Gaillaria. (Photo by Kathy Keatley Garvey)](/blogs/blogcore/blogfiles/107755.jpg)
![A Gulf Fritillary butterfly, Agraulis vanillae, nectaring on lantana. (Photo by Kathy Keatley Garvey) A Gulf Fritillary butterfly, Agraulis vanillae, nectaring on lantana. (Photo by Kathy Keatley Garvey)](/blogs/blogcore/blogfiles/107757.jpg)
![A praying mantis, Stagmomantis limbata, perched on a Cosmo and looking for prey. (Photo by Kathy Keatley Garvey) A praying mantis, Stagmomantis limbata, perched on a Cosmo and looking for prey. (Photo by Kathy Keatley Garvey)](/blogs/blogcore/blogfiles/107758.jpg)
![Goodbye! A yellow-faced bumble bee, Bombus vosnesenskii, exits a lavender patch. (Photo by Kathy Keatley Garvey) Goodbye! A yellow-faced bumble bee, Bombus vosnesenskii, exits a lavender patch. (Photo by Kathy Keatley Garvey)](/blogs/blogcore/blogfiles/107759.jpg)
- Author: Ria DeBiase, UC Giannini Foundation
How policies affect emissions, land use, and the prices of fuel and vegetable oils
Over the last two decades, both the federal government and state governments have enacted policies to reduce greenhouse gas (GHG) emissions in the transportation sector. In a new Special Issue of ARE Update, University of California agricultural economists explore how these federal and state renewable fuel policies have affected biofuel production for motor and aviation fuels and consider how these policies have affected land use and food prices. Their research shows that as U.S. demand for renewable diesel began to outpace supply, consumer prices for vegetable oil—which is used as a feedstock for renewable diesel—surged.
The national Renewable Fuel Standard (RFS) and California's Low Carbon Fuel Standard (LCFS), implemented in 2006 and 2011, respectively, have led to an increase in the amount of biofuels consumed and produced in the United States. While the RFS mandates that a minimum volume of renewable fuels be blended into U.S. transportation fuels, the LCFS sets an annually increasing targeted reduction in transportation-related carbon emissions. The LCFS set a 2030 target date to reduce GHG emissions by 20% through the development of a carbon trading program that requires refiners who produce ‘dirtier' fuels to buy credits from those who produce cleaner (e.g., renewable) fuels.
The authors show that after 2020, when LCFS credit prices (i.e., biofuel subsidies) were high, California saw an increasing volume of motor fuel coming from renewable diesel — which previously only made up around 5% of the state's diesel blend. Currently, the retail diesel blend in California is 35% conventional diesel and 65% renewable diesel. By 2023, renewable diesel — which, unlike biodiesel, is a perfect substitute for conventional diesel — was the most consumed renewable fuel in California and also generated the most credits under the LCFS.
The agricultural inputs used to make renewable diesel can be used not only in the production of motor oil, but also in the development of sustainable aviation fuel (SAF). Additional tax credits set forth in the 2021 Inflation Reduction Act aim to bring about a 100-fold increase in the production of these fuels by by the end of decade. However, the authors of the second article show that current incentives to produce SAFs are not large enough to overcome the opportunity cost of instead using these fuels for on-road use.
After the drastic increase in demand for renewable diesel (up 500% over the last five years), a higher percentage now comes from edible vegetable oils. This increased demand almost certainly plays a role in increasing inflationary pressure on foods such as cooking oils.
“From 2018 to 2024, food-at-home inflation was 24%, but over the same period, fats and oils inflation was 83%,” said UC Davis professor and co-author Jens Hilscher.
The increased demand for these oils from the United States has also led to booms in production in countries such as Brazil and Indonesia, and some of the land conversion into these vegetable oil crops could result in deforestation. Greenhouse gas emissions are a global challenge. The authors show that local biofuel mandates often succeed in moving U.S. consumption of these fuels from one product or region to another without necessarily decreasing emissions at the national level. Their research emphasizes the importance of a coordinated effort to target emission reductions with a careful eye to the indirect consequences that inevitably result from ambitious policies.
To learn more about how federal and statewide renewable fuel policies have affected the demand for biofuels, read the full Special Issue of ARE Update 27(5), UC Giannini Foundation of Agricultural Economics, online at https://giannini.ucop.edu/filer/file/1719507310/21010/.
ARE Update is a bimonthly magazine published by the Giannini Foundation of Agricultural Economics to educate policymakers and agribusiness professionals about new research or analysis of important topics in agricultural and resource economics. Articles are written by Giannini Foundation members, including University of California faculty and Cooperative Extension specialists in agricultural and resource economics, and university graduate students. Learn more about the Giannini Foundation and its publications at https://giannini.ucop.edu.
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