Re: CULT: iris haircuts
- Subject: Re: [iris-talk] CULT: iris haircuts
- From: d*@aol.com
- Date: Mon, 2 Jul 2001 18:58:40 EDT
In a message dated 7/1/2001 1:22:12 PM Mountain Daylight Time,
donald@eastland.net writes:
> Plus, since the grasshoppers eat the leaves off in great chunks, many which
>
> Hi Donald:
> I battled grasshoppers in Arkansas for several years until I researched
> and found Nosema locusta. I bought one pound of the bait, followed the
> instructions to the letter and saw a reduction in the population within a
> reasonable time but the following year and for three years afterward, the
> reduction was incredible.
> I didn't notice that the damage done by the grasshoppers affected the
>
Keeping the grass/weeds mowed from the borders of your garden/beds is
necessary, as per the instructions. . .
>
Natural Enemies
There are a number of organisms which feed on grasshoppers and some can be
used as biological control organisms.
Protozoans - The best known is Nosema locusta, a sporazoan. This is a
disease-causing organism which occurs naturally but usually does not cause
the kind of epidemics in the wild that would control grasshopper populations.
When N. locusta is applied to bran baits and targeted against early occurring
nymphs, the rates of infection can be dramatically increased. In addition,
because grasshoppers will cannibalize when populations get high enough, even
higher infection rates are brought about by healthy older stages consuming
younger nymphs dying of the disease. N. locusta can also be transmitted
through the egg to he nymphs, impacting next year’s population.
Unfortunately, like any other disease, N. locusta takes time to control
populations and crop protection does not start until a sufficient proportion
of the population has been infected.
Hope this helps you. .
Doris Elevier, El Paso, TX Zone 7, AHS 9-10 Hot, dry, AND windy.
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