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A Natural Solution for California's Herds: African Catfish Peptides

California's cattle producers and agricultural communities are all too familiar with the rising challenge of antibiotic resistance, making common bacterial infections harder to treat in livestock. But imagine a future where we could tackle these infections with a natural, powerful alternative. Our research points to just that: antimicrobial peptides (AMPs) found in African catfish.

We're really excited about these peptides because African catfish thrive in pathogen-rich freshwater, naturally producing these robust immune compounds in their skin mucus as a defense. This natural origin makes them highly appealing alternatives to synthetic drugs.

Predicted Safety and Potent Action

One of the most compelling aspects of these AMPs is their predicted safety for mammals. Our initial computer analyses suggest that various catfish AMPs are generally recognized as safe (GRAS). We predict they'll be absorbed in the human intestine without causing liver, brain, or heart toxicity. Furthermore, lab tests on a promising peptide, NACAP-II, confirmed it was non-hemolytic, meaning it didn't damage rabbit red blood cells—a strong indicator of its potential safety for mammalian cells.

Beyond safety, these peptides demonstrate effectiveness against problematic bacteria. One study revealed NACAP-II's strong activity against Extended-Spectrum Beta-Lactamase (ESBL)-producing Escherichia coli—a critical concern for both animal and human health due to its resistance to many common antibiotics. Another peptide, ACAP-IV, also showed antibacterial activity against E. coli and Staphylococcus aureus. We believe these AMPs work by directly disrupting bacterial cell membranes, a mechanism that makes it harder for bacteria to develop resistance compared to how they resist traditional antibiotics.

Cooperative Extension Ventura County: Page

Pests, Viruses, and Diseases Menu

Aphids on Citrus Black Fly Botrytis Brown Rot Cabbage Looper California Red Scale Codling Moth Fig Rust Fireblight Honeydew and Sooty Mold Late Blight on Tomatoes Omnivorous Leafroller Orange Worms Peach Leaf Curl Powdery Mildew Pumpkin Viruses Root Know Nematode Scale on Citrus Squash Virus Tomato...

Cooperative Extension Ventura County: Page

Aphids on Citrus

There are several species of aphids that will infest citrus on the Central Coast. The cotton/melon aphid, Aphis gossypii feed on the underside of young leaves, causing curling and distortion. To control infestations of aphids, spray the infested foliage (no need to spray the whole tree).

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Black Fly

Black flies, Buffalo gnats or Turkey gnats are true flies not a bee, wasp or ant. They are very small one to five millimeters long and usually black to gray in color. Black flies tend to bite where clothing fits tightly against the body.

Cooperative Extension Ventura County: Page

Botrytis

With the late and often heavy spring rains, Botrytis gray mold has been an unusually severe problem. Rose flowers have in many instances been severely blighted. Jasmine, geranium plus other garden flowers and vegetables have also been affected.

Cooperative Extension Ventura County: Page

Brown Rot

Brown rot of apricots and other stone fruits (plums, peaches, prunes, cherries, and nectarines) can be a serious problem for Central Coast gardeners. Brown rot is caused by a fungus which can attack all parts of the tree. Buds, twigs, and fruit are the primary infection sites, however.

Cooperative Extension Ventura County: Page

Cabbage Looper

The cabbage looper may be more familiar to you under the name inch worm. The adult cabbage looper is a dull brownish-gray moth.

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California Red Scale

California Red Scale is a very important pest on California citrus. Lemon is most susceptible, followed by grapefruit, Valencia orange, navel orange, and Mandarin orange. Grapes, holly, olives, roses, eucalyptus, mulberry, and walnuts can also be attacked.

Cooperative Extension Ventura County: Page

Codling Moth

The first phase of codling moth control I recommend is to thin the apple crop. Apples produce fruit in clusters. When the small apples are from dime to quarter size, thin the fruit to one per cluster. If the crop is very light, leave two apples per cluster.

Cooperative Extension Ventura County: Page

Fig Rust

Fig rust is a fungus-caused disease, and the literature I have indicates that fig rust is rare in California. Control of rust on figs is going to be difficult. Very few good fungicides are registered for use on figs. In fact, my references list only two.

Cooperative Extension Ventura County: Page

Fireblight

Fireblight symptoms usually occur in the spring, right after a rain or even a fog drizzle. Fireblight is a disease caused by a bacterium. The bacterium, Erwinia amylovora, survives from year-to-year in the tree. It becomes active in the spring when new foliage and blossoms are developing.