In our November post we covered three pests that can give gardeners winter headaches.  Here are three more you’ll need to worry about.

Many thanks to Cyd Brown, Somervell County Master Gardener, for submitting these articles.

SCORPIONS (order Scorpiones)

Identification and Biology
You may never see scorpions in your garden.  They are mostly nocturnal hiding under debris, rocks, and mulch.  You may be able to spot Scorpions at night with a UV light,

Scorpions are predatory arachnids.  They have four pairs of legs, two pincers or claws for holding prey, and a long tail tipped with a long stinger. The scorpion’s sting delivers a shot of neurotoxins which paralyzes its prey.  Female scorpions can give birth about every two weeks and will carry their young on their back.

The most common species found in Texas is the striped bark scorpion.

Damage
Fortunately scorpions won’t damage your plants.  Unfortunately, scorpions can deliver a very painful, and sometimes serious, sting if they are disturbed.   

Contrary to common lore, most scorpion bites are considered non-lethal to humans.  However, according to Web MD, venom from a bark scorpion can cause symptoms “like fast breaths, high blood pressure, a racing heart, weakness, and muscle twitches.If you think you’ve been stung, don’t take chances. Go to the nearest Emergency Room.  Take the scorpion with you if you can (dropping the scorpion in boiling water will kill it.)

Management
You will likely only have problems with scorpions if you surprise them.  Wearing good work gloves is the best defense.  Scorpions love dark warm place – like shoes.  To prevent toe stings, don’t leave shoes or boots in the garden or greenhouse.

Remove all unnecessary debris and mulch. 

Natural oils can be effective short-term treatments for scorpions. These oils include; clove oil, rosemary oil, and cinnamon.   Use synthetic pesticides like permethrins or carbaryl (Sevin) can deliver more long-term treatment.

 

Thrips (order Thysanoptera)

Identification and Biology
Thrips are tiny, almost microscopic pests measuring about 1/32” long.  Females lay eggs in plant tissues.  After hatching, thrip larvae drop off the plant to pupate in the soil.  This development cycle can take between 8 and 20 days. 

There are about 6500 known Thrip species. Some thrips feed on plants.  Others are predators that hunt insects or other Thrips.  Only a small number of Thrip species threaten plants.

Damage
Plant damage from Thrips can vary depending on Thrip specie.  Like other insects, Thrips can cause damage during feeding creating silver or bronze colored leaf spots. Leaves will eventually fall prematurely.  They can secrete honeydew which will attract ants and form black mold. 

Perhaps the most serious problem caused by Thrips is the insects’ ability to spread plant viruses.  These viruses include spotted wilt virus (tomatoes),  nectrotic spot virus (impatiens), and Silver Mott Virus (melons and potatoes).  NOTE: Thrips are the only known insects that can spread tospoviruses – diseases that can cause serious economic damage.

Monitoring
Thrips are attracted to yellows and blues, so yellow or blue sticky cards can be used to catch them. Blue or white water pan traps can also be used to detect them. To check for thrips, beat flowers or plant leaves above a piece of white paper and look for tiny walking dashes. 

Be aware – Thrips can bite.  Avoid wearing bright colors (especially yellows and blues) in the garden. 

Control
Thrips can be very difficult to control as many species are known to have developed resistance to pesticides.  Products with the active ingredient Spinosad is probably your best bet.

Many experts recommend proven sanitary gardening practices as an effective Thrip control.  Remove infested plants from the garden or greenhouse as soon as possible.   Cleanup debris such as old mulch and dead plants.  Burn garden garbage if possible.  Be careful not to create tiny shelters where Thrips can hide and multiply.

 

Scale Insects (infraorder Coccomorpha)

Identification and Biology
If you see what looks like tiny fish scales slowly moving around on your plants’ leave or stems, you may have a scale insect problem.  The scales you see protect the underlying insect and cover the bug’s head and legs.  Scale insects come in two flavors; soft and hard.

Soft scale insects have a leathery, waxy scale that stays attached to the body.  These species feed on the plant’s vascular tissue (phloem) and will produce a sticky, ant-attracting honeydew.  The hard scale variety has stiffer wax, and feeds directly on the plants’ cells. 

Only immature scale insects move.  At maturity the scales drop off and the insects become immobile.

Damage
Large infestations of scale insects can cause serious plant damage.  Leaves may turn yellow or distorted and fall prematurely. Deposits of honey dew will attract ants (ants protect scale insects from predators) and will eventually begin growing mold.

Control
Heavily pruning infested plants is the best defense.  For houseplants, wash leaves and stems with a soft toothbrush or cotton swab dipped in soapy water or isopropyl alcohol. Horticultural oil, insecticidal soap, or neem oil can also be used. 

Be sure to remove honeydew spots and control ants. 

In colder months, apply dormant oil to the woody plant parts. This will help control over wintering scale insects.

Fighting insects never stops. Here are three bad bugs you may see in your garden or greenhouse most anytime of the year.

Many thanks to Cyd Brown, Somervell County Master Gardener, for submitting these articles. 

Fungus Gnat (Bradysia spp)

IDENTIFICATION AND BIOLOGY
Fungus gnats are one of the most common types of gnats found in Texas.  Adults are 1/8 inch long, delicate-looking blackflies with slender legs and thread-like antennae. They are attracted to light and you may see them “dancing” above the soil surface or flying around windows and lights.

Larvae live in the soil and are clear to white, about 2mm (0.08inch) long with shiney black head
capsules.

DAMAGE
Adult fungus gnats are considered a nuisance as they feed on plant liquids.   Larvae feed on organic matter by burrowing into the plant or feeding on root hairs causing wilting, even when watering is satisfactory. Extreme infestations of Fungus Gnat larvae can stunt or kill young plants.

MONITORING
The use of sticky traps can aid in monitoring for fungus gnat adults. Best results are obtained by using small pieces of sticky trap laid horizontally on top of the soil. Peeled potato chunks, 1” by ½” will attract larvae when placed on the soil surface. When you see larvae in the potato, sometimes in as little as 4 hours, throw away and replace.

MANAGEMENT
Cleanliness is key when battling Fungus Gnats in the greenhouse. Remove plant, debris, old potting mix diseased plants and other organic trash.
Light infestations may be controlled with the sticky traps and potato chunks. Large infestations may be treated with biological control agents like Steinernema nematodes or Hypoaspis predatory mites. The biological insecticide Bacillus thuringienses subspecies israelensis (Bti) may provide fast-acting, temporary control.

Mealey Bugs (Pseudococcidae spp)

IDENTIFICATION AND BIOLOGY
Mature male mealybugs are soft, wax-covered, insects of many genera. Adult females are wingless with oval bodies covered in a white mealy wax. Mealybugs can produce both sexually and asexually, so populations of these insects can rise dramatically in a short period of time. Most species of Mealybugs lay eggs in a white cottony sac.

Mealybugs suck plant sap and may produce sticky honeydew that leads to sooty mold growth on leaves which can impede photosynthesis.

DAMAGE
Mealy bugs can cause a condition called “Soft Scale” – large lumps and white fluff on leaves.  Soft Scale is caused by mealy bugs as well as other large sap sucking pests causing stunting, leaf. yellowing and deformation of plant parts.

MONITORING
The best method for monitoring is visual inspection. Mealybugs like to live in protected plant spots, like in the crown, in branch crotches, or on stems near the soil; so, check the plant very carefully. Some mealybugs may be found around the drainage holes of pots. To detect some underground infestations, you may have to remove the root-ball from the pot.

MANAGEMENT
Prevention is always the best. Before purchasing plants, check them over carefully for Mealy Bugs and other pests.

Soaps and oil sprays may provide some control for light infestation. Several applications may be needed. Systemic insecticides like imidacloprid or dinotefuran can be applied as soil drench. Be sure to read the product label and follow all instructions. 

Whiteflies (Aleyrodidae spp)

 

IDENTIFICATION AND BIOLOGY
Whitefly adults are small (approximately 1/16 – 1/8 inch), 4-winged, moth-like, and covered with white, waxy powder. Immatures are flat, oval, glassy to opaque, yellow or green-ish, and may have a fringe of wax filaments.

DAMAGE
Whiteflies feed on leaves, sucking juices from the plant. Damaged leaves become yellow, appear to be dry and may fall from the plant. Like Mealy Bugs, Whiteflies can produce honeydew which leads to Sooty mold fungus.

MONITORING
Check the undersides of plant leaves looking for all stages of whiteflies. A few individuals can produce thousands of young in a very short time, so inspect often. You can also use yellow sticky traps, hung just above the plant leaf canopy.

MANAGEMENT
Before purchase check plants for mealy bugs and other pests. Keep growing areas free of weeds. Cut out infested plant parts.  Remove and destroy heavily infested plants. High pressure water sprays to the underside of leaves may dislodge adults and nymphs (once a week for a least three weeks) and will also wash off honeydew and sooty mold. Insecticidal soaps and oil may kill whiteflies on contact but be sure to thoroughly cover the undersides of leaves. Multiple applications may be needed. 

Whiteflies have developed resistance to many pesticides. Recommended insecticides for Whiteflies include Azadirachtin, Bifenthrin, and Imidacloprid. Check the product label and follow all instructions.

Arbor Day in Texas is the first Friday in November.  This means it’s tree planting time in North Central Texas.  If new trees are in your future, follow these tips from the Texas A&M Forest Service.

TREE PLANTING ADVICE FROM TAMU

Here are top planting recommendations from TAMU biologist Robert Edmondson.

1.  Between Halloween and Thanksgiving is generally the best time to plant trees in North Texas.
2. Dig the planting hole twice as big as the tree’s root ball.
3. Fill the planting hole with water and check the drainage. If it takes longer than 24 hours to drain, choose another location.
4. Remove all foreign materials from the tree. This includes wires, tapes, burlap, and supports.
5. Trim sparingly. Only remove dead and diseased branches
6. Set the tree in the hole with the root collar flush or slightly above the natural grade. Planting too deep is a leading cause of newly planted tree mortality.
7. Once the tree is placed, gently backfill the planting hole with the same soil that came out of the hole.
8. When planting, never lift the tree by the trunk.
9. Stake a newly planted tree, only if necessary. Stakes should not be left in place longer than one year.
10. Mulch the tree out to the drip line. Mulch should be 2-3 inches deep, but not touch the trunk.
11. Protect the tree from animals and humans. Deer, livestock, weed whackers, and mowers are all bad news from young trees.  A staked, wire mesh cage at least 3 feet in diameter and 4 feet tall works well.

WATERING YOUR NEW TREE

Watering your new tree is critical – but not too much.  Here are watering tips and recommendations from TAMU:

When watering, pour water over the root ball.  Do not squirt water at the trunk.  Do not overwater.  Use 2-4 gallons of water for each inch of trunk diameter (use higher number is summer and lower number in winter. 

How much water?  Here are TAMU’s “Rules of Thumb” for watering newly planted trees.

Month 1 – Water 3X per week

                                                Month 2 – Water 2X per week

                                                Month 3 – Water 1X per week

                                                Months 4-12 – Water 1X-2X per month

                                                Beyond Year 1 – Water in absence of rain

For these and more tips for new trees see.

https://tfsweb.tamu.edu/arborday/plantingsteps/

Arbor Day – a day dedicated to planting trees – is celebrated across the United States and around the world.  Your Somervell County Master Gardeners Chapter has an exciting Arbor Day celebration planned for November 2 at Heritage Park in Glen Rose.  See https://txmg.org/somervell/ for more information.  Since November is still a ways away, here’s a little Arbor Day background.  It all started in Nebraska.

J.S. MORTON AND CAROLINE Young Julius Sterling Morton and his new wife, Caroline, settled in the Nebraska Territory in 1854.  He had two passions; publishing and nature.  The Mortons settled in, and Julius began his career as the editor of the Nebraska News in Nebraska City. Morton eventually threw his hat in the political ring, and was soon was appointed Nebraska’s territorial Secretary of State from 1858-1861 and was also the acting territorial governor from 1858-1859.

Julian and Caroline Morton

NEBRASKA AND THE GREAT AMERICAN DESERT
During the 19th century Nebraska was part of what U.S. Army engineers and surveyors called “The Great American Desert” – a term used to describe lands East of the Rocky Mountains.  In those days “Desert” was commonly used to describe uninhabited, treeless lands.   One geographer of the day described the area as “… almost wholly unfit for cultivation, and of course, uninhabitable by a people…”  Others compared it to the “the sandy deserts of Africa.” 

HE BELIEVED IN NEBRASKA
Nebraska – A Desert!!!!  Julius Morton wasn’t having any of it. Morton – a strong believer in Nebraska and it’s people – dropped out of politics so he could better support agriculture in his state. He promoted scientific farming methods as well as water conservation initiatives.

In 1872, Morton made a bold proposal to the Nebraska State Board of Agriculture.  Create a day devoted to planting trees.  His idea was adopted, and Arbor Day was born.

The first Arbor Day celebration in Nebraska took place on April 10, 1872.  It was a huge success.  Counties and individuals were awarded prizes for planting trees. Communities dedicated newly planted trees to prominent citizens.  All in all, it is estimated one million trees were planted.  Julius Sterling Morton lived to see his dream fulfilled.

ARBOR DAY TODAY
Every state in America recognizes Arbor Day.  Arbor Day celebration dates vary from state-to-state and usually are scheduled to coincide with the best dates for planting trees.  For example, Arbor Day in Texas is the first Friday in November while Arbor Day in Michigan happens on the last Friday in April.  The Arbor Day Foundation, a nonprofit organization dedicated to fighting climate change through reforestation, estimates they have helped plant over 500 million trees.

November will be here before you know it. If you love trees (and who doesn’t?), be part of this historic celebration in Glen Rose.  Plan to bring the family to the Somervell County Master Gardeners’ Arbor Day Event on November 2.

For more information please plan to attend our Open House on October 16th.

Ancient Egyptians treated scorpion stings with basil, while the Chinese used basil to treat stomach spasms and kidney ailments. In West Africa Basil teas were used to break fevers. English in the 16th century treated toothaches with basil.
 

THE SCIENCE OF BASIL

Ancient cultures may have used Basil, but only recently have investigators been unlocking the secrets of this amazing plant.  Here are some amazing things scientists are learning about Basil – Queen of Herbs.

Basil and Fungus
While restoring an ancient Portuguese mural, artists hit a snag – black, furry fungus spots.  Removing fungus from priceless art can be tricky business.  If concentrations of chemical biocides are too weak, the fungus won’t die.  On the other hand, the art is damaged if the chemical concentrations are too strong.  The restorers tried a few anti-fungal solvents, then had an idea – try oil of Basil.  It worked!!  Essential oil of basil.  Basil oil beat out two leading commercial biocides without marring the art.

Basil and Your Okra
Many vegetable gardeners faithfully plant Basil as a companion plant with their tomatoes as a natural pesticide.  Researchers in Africa tested interplanting Basil with Okra as a pest control.  The results yielded a 23% reduction in harmful pests when compared to Okra not planted with Basil.

Basil for Your Breath
Using extract of Basil leaves, researchers in Indonesia have created an edible film and are testing several formulations.   Test groups are reporting a pleasant taste as well as and effective mouth freshener.  Basil Breath Mints – Coming Soon.

Basil Seeds – Tiny Miracles
For many years, Basil greenery has been widely studied for health and medicinal benefits.  Scientists have just recently begun to investigate Basil seeds and their health and healthcare potential.  Results are nothing short of remarkable.   A few of the beneficial properties of Basil Seeds include antioxidant; anti-asthmatic; anti-inflammatory; anti-arthritic; and anti-microbial.  Many scientists believe we will soon see important medicines and treatments derived from the tiny Basil seed.
 

 TYPES OF BASIL

     

Browse your favorite seed catalogue and the varieties of basil might surprise you.  Plant experts can’t seem to agree on how many varieties of basil exists; some say 60-65 types exists; others say up to 150.  Here are a few types of Basil that will do well in your garden.

Holy Basil (Ocimum tenuiflorum)
Also known as Tulsi, Holy Basil has been revered by Hindu cultures for centuries, and is used in cooking, Ayurvedic medicine, and religious ceremonies.  Holy Basil is much loved for its spicy taste.

Genovese Basil (Ocimum basilicum ‘Genovese’)
Genovese Basil is probably the most common Basil used in Western cooking (especially Pesto).  This Basil is easy to grow, and does well in pots.

Sweet Basil (Ocimum basilicum)
Sweet Basil and Genovese Basil are often confused, but they are two distinct Basil varieties.  The taste of Sweet Basil is said to have a hint of licorice.

Osmin Purple Basil (Ocimum basilicum ‘Osmin purple’)
There are many varieties of purple Basil.  Osmin Purple is the most common. It’s raw leaves are commonly used to add color and a hint of clove to your favorite tossed salad

Lemon Basil (Ocimum basilicum citriodorum)
Lemon Basil is common in Thai cooking.  It has a slight lemony flavor.

 

 

Plant some basil today and you’ll have the Taste of Italy at your fingertips.  Plant some Basil tomorrow, and you may have a cornucopia of medicines just outside your back door.