- Author: Kathy Keatley Garvey
Ladybugs love our Russian sage.
Ladybugs, aka ladybird beetles, eat aphids, which are pests in the garden. The ladybugs are welcome. The aphids are not.
Belonging to the family Coccinellidae, ladybugs look resplendent in their bright red or orange wing covers, dotted with spots. They'd surely be the center of attention at a Bug Ball. Luck be a lady.
We see immature ladybugs going through metamorphosis. Last weekend, we witnessed a pupa sheddding its skin. Exvium is a biological marvel.
If you want to see a ladybug eating an aphid, you'll have to watch the 44-minute film presentation, "Biological Control of Greenhouse Pests with Natural Arthropod Enemies," to be shown at 12:15 p.m., Wednesday, Oct. 15 in 122 Briggs Hall, UC Davis campus. It's the work of professor Urs Wyss of the Institute of Phytopathology, Kiel University, Germany, who will be there to discuss the film. It shows ladybugs stalking, capturing, killing and eating aphids--not necessarily in that order.
What's unique about this film is the amazing photography. "All recordings were made with a special stereomicroscope and camera, magnified to a high degree," Wyss says.
We first saw the film on May 16 at the UC Davis Entomology Club meeting. Michael Parrella, entomology professor and associate dean of the Division of Agricultural Sciences, College of Agricultural and Environmental Sciences, narrated it.
You'll never forget the sucking and slurping noises as predators devour their prey!
- Author: Kathy Keatley Garvey
Pity the poor caterpillar. Here you are, minding your own business, and this tachinid fly comes along and lays eggs in your head.
Good day for the tachinid fly. Bad day for the caterpillar.
The tachinid fly, from the family Tachinidae, is frequently seen buzzing around flowers, like this one (below) in the Storer Gardens at the UC Davis Arboretum. The adults feed on nectar.
"They're parasites," said Lynn Kimsey, chair of the Department of Entomology and director of the Bohart Museum of Entomology. "They often parasitize Lepidoptera caterpillars by laying eggs in them."
They also lay their minute eggs on plants, which caterpillars ingest. The eggs hatch inside the caterpillar, killing it.
"Inside the victims, the larvae breathe free air by perforating the body wall of the host or by a connection to its tracheal system," write Jerry Powell and Charles Hogue in their book, California Insects.
It is not a pretty sight. But then again, tachinid flies aren't pretty--unless you're another tachinid fly.
- Author: Kathy Keatley Garvey
If you've ever visited the Storer Gardens, UC Davis Aboretum, you've probably noticed the honey bees enjoying the cenizo(Leucophyllum frutescens), an evergreen shrub with silvery foliage and bell-shaped pinkish-lavender flowers.
It attracts honey bees and other beneficial insects like kids to a carnival.
It's sometimes called Texas sage, but it isn't a sage. It's in the plantago family and is native to the southwestern United States and Mexico.
Rain drops on the blossoms, bees in the blossoms, and all's right with the world.
If a picture is worth a thousand words, then here we go with three thousand!
- Author: Kathy Keatley Garvey
We often hear of "cream of the crop," but the honey bee is the "queen of the crops."
Honey bees are crucial to
Can you name a fruit or nut crop that absolutely depends on honey-bee pollination? So much so that no commerical crop could be produced without cross pollination? No, not tomatoes! Here are some: almond, avocado, apple (most varieties), apricot (some varieties), cherry, chestnut, lychee fruit, peach (some varieties), pear (some varieties) plum, pomegranate, prune, sunflower, tangelo and tangerine.
- Author: Kathy Keatley Garvey
The praying mantis isn't at all concerned about culinary choices.
It doesn't worry about who's coming to dinner, only that dinner will come.
This aggressive, predatory insect will eat just about anything it can get its claws on, entomologists agree. That includes bees, butterflies, grasshoppers, crickets, moths and flies. It's even been known to catch and feast on small frogs, birds, lizards, mice and snakes--not to mention its own species. During or after mating, the female often bites off her lover's head and eats him. Sexual cannabalism!
The praying mantis (insect order Mantodea) is difficult to spot. It's camouflaged brown, green or yellow to match its surroundings. You may see it on tree bark, foliage, fallen leaves, sticks 'n stones, blades of grass and flowers. A master of ambush, it perches stealthily, its front legs in a "praying position," as it patiently awaits the first course. Then whoosh! It lashes out and grasps its victim with its spiked forelegs. The ending is not pleasant.
Just be glad that the praying mantis is not human-sized.