A virtual forage and alfalfa field day - our insect pest contribution
This year, the Kearney Research and Extension Center Alfalfa and Forage Field Day went virtual. Attendees did not get the chance to look out over lush fields of alfalfa or towering plantings of sorghum, but they get did an update on ongoing work in alfalfa and other forages. Our team put together a rapid-fire video to discuss what are typically the key insect pests in California alfalfa: summer worms, alfalfa weevils, and aphids.
- Author: Rachael Freeman Long
- Author: Michelle Leinfelder-Miles
- Author: Dan Putnam
We all recognize human health as a goal, but healthy soils is a key goal for farming operations, since healthy soils frequently result in higher yields and economic returns over time. "Health" is often defined with a range of properties including high fertility, good water-holding capacity and drainage, long-term productivity, and sustaining organic matter content.
A joint UC Davis and UC Cooperative Extension research project was recently awarded funding for $250,000 from the
- Author: Nicholas Clark
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Date: September 23, 2020
Time: 8:30 AM - 12:00 PM
Location: Zoom Meeting
Registration: Click here to register.
Registration fee: $9.23
What: UC Cooperative Extension will provide updates on applied research in alfalfa variety, irrigation, and pest management; sorghum and its use in dairy feeding; sugar beets and safflower as winter forages; and personal protective equipment in a time of.../h2>/h2>
- Author: Rachael Long
- Author: Ian Grettenberger
- Author: Daniel H Putnam
Many splotches on your windshield? You are not alone.
Summertime brings various worm pests, including beet armyworm (Spodoptera exigua) and western yellowstriped armyworm (Spodoptera praefica), and alfalfa caterpillars (Colias eurytheme). Armyworms are larvae of moths while alfalfa caterpillars are larvae of the pretty white and yellow butterflies (aka. sulphur butterfly), that we see flying around alfalfa fields. Females tend to be white and males yellow.
Figure 1. Alfalfa Butterfly (AKA sulfur butterfly) adult feeding on flowers. (photo: Kathy Keatley Garvey)
VIDEO SHOWING ALFALFA CATERPILLARS IN THE FIELD...
"The enemy of my enemy is my friend" holds true in entomology as well!
The activity of natural enemies of pests (beneficial insects) is a key component of Integrated Pest Management in alfalfa to prevent pest resurgence and secondary pest outbreaks.
This is especially true for blue alfalfa aphid (BAA), a challenging pest in alfalfa (see companion article on managing BAA). Although BAA is frequently the most damaging and troublesome aphid to control, spotted alfalfa aphid, pea aphid, and cowpea aphid can also be problematic.
In alfalfa, aphids have many natural enemies. Some, like lady beetles, syrphid...