The Purdue Yard and Garden News has a new article related to the extreme drought we are experiencing (https://ag.purdue.edu/agcomm/Pages/NewsYGarchive.aspx). Highlights are:
- Watch new plantings most for signs of drought injury
- Blossom end rot of tomato has been seen around Gibson County. This is caused by infrequent watering.
- Proper mulching can conserve moisture in the landscape or garden.
- Water by soaking the soil thoroughly in one application. This will likely require a few minutes of water applied to each area, rather than a fast, shallow application.
- Drought can be a primary cause of plant death that appears to be caused by other problems: insects or woodpeckers, namely. Many plant problems that appear to be insect-related only allowed the insects to feed due to the stress of drought conditions.
- The damage that occurs to landscapes now may not manifest itself this season. The bumper crop of fruit on fruit trees this year may be the tree's last attempt to reproduce before dying back significantly or completely next year. Likewise, buds that form this year can affect next year's growth on many landscape plants.
- Dormant yards can become dead grasses if left unwatered too long. Apply 0.5 inches of water every 2 to 4 weeks to keep dormant lawns from becoming dead lawns.
- The best time to water is in the morning, before 8 AM.
- Leftover water from other household activities can be used sparingly as a last resort on non-edible crops. Detergents and soaps can leave a salt buildup in the soil if used too frequently.
Greater than 100 degree Fahrenheit temperatures over the next few days will likely cause drought symptoms to exacerbate, especially with the relatively low humidities we can expect to experience. Provide yourself plenty of water before watering plants, and keep in mind the potential for heat-related illnesses in humans, as well as plants. For the complete article referenced here, go to https://ag.purdue.edu/agcomm/Pages/NewsYGarchive.aspx.
Thoughts, tips, and upcoming events for the citizens of Gibson County, Indiana.
Wednesday, June 27, 2012
Tuesday, June 19, 2012
Drought Information
The newest update of the USDA Drought
Monitor has placed Gibson County in a severe drought status. This means, essentially, that the state
climate office and regional climate center find stream flows, soil moisture,
precipitation, and other indices of available moisture to be between 6 and 10
per cent of normal conditions. Crop losses in yields are now measurable, and
the possibility for hydrologic water shortages is imminent. As of June 7, the Climate Prediction Center
released a prediction of drought persistence for our area through the end of
August. Let us examine some of the
potential outcomes and real outcomes of the severe drought in this area.
Homeowners at the current time should
consider retiring the lawnmower until conditions improve. Causing additional stress by mowing while
grass is dormant will encourage weeds to outcompete the grass for resources once
the drought breaks. For the time being,
irrigated lawns may still be mowed, but those individuals using city water
should ensure that no water use restrictions have been put in place concerning
landscape irrigation. The Indiana
Department of Homeland Security currently does not report a burn ban in place
for Gibson County, but individuals should be using extra caution when
attempting to burn due to the excessively dry conditions. If any landscape features, such as trees,
shrubs, lawns, or flowers, wish to be kept viable throughout the foreseeable
future, irrigation is advisable. With
the exception of trees, non-irrigated plants showing signs of drought stress
should be watered. Trees tend to mask
drought symptoms during a single season and show symptoms in following
years. Therefore, all trees wishing to
be retained should receive supplemental water.
The amount of supplemental water to apply should be 1 to 1.5 inches of
water at the root zone, applied once every two weeks. Turf is the exception to this
recommendation. Aaron Patton, Purdue
Extension Turfgrass Specialist, recommends that dormant, or already brown,
grass be kept dormant but alive with a half-inch of water applied every 2 to 4
weeks. Actively growing grass can be
kept active with at least one inch of water applied each week. Plants should be watered early in the
morning, if possible, to provide ample moisture during the day and minimize
evaporation.
Field crops are responding to the
drought in disheartening ways. The leaf
curl of corn has continued. Bob Nielsen,
Purdue Extension Corn Specialist, states that the crop predicts row number on
the ear of corn to the seventh leaf stage, and the drought can reduce this row
number by 2 to 4 rows. The major impact
of drought on yield may be pollination.
Hot and dry weather during tasseling of the corn plant, likely to occur
in the next week or so in Gibson County, greatly affects pollen viability of
the plant and the need for coinciding silking, or the formation of silks on the
corn ear to receive pollen. Drought can
affect the timing of the production of these reproductive structures, thus
reducing yields by, potentially, 40 to 50 per cent. You may also notice this year that corn
plants are smaller overall, a drought effect that may allow weed pressure later
in the season to have a negative effect on yield.
Soybeans are more resilient in the face
of drought. Much research confirms that
yield losses of soybean crops are generally less, as a percentage, than those
of their corn neighbors when exposed to droughts of the same nature and
length. However, soybean are affected by
drought. Plant height is currently being
impacted, as many earlier planted soybeans are currently in their reproductive
growth stages, despite having only four or five mature leaves. The bean pods of these plants may end up
fewer in number and with fewer soybeans inside the pods than in a wetter
year. Other field crops, including
forages and melons, are experiencing similar effects unless irrigated. Hay availability in the area may become an
issue in the near future with severe drought conditions, as hay-making ability
is reduced while hay demand increases.
More field crop drought information is available at the Chat 'N' Chew Cafe (http://www.agry.purdue.edu/ext/corn/cafe/drought/index.html).
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