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English grain ahidgramineous crop pest
If you are a member of JADAM, you must know what Banker plant is. Banker plant includes Bird Cherry-oat Aphid, Corn Leaf aphid, English Grain Aphid and extra. Their hosts is rice. I am going to explain about how to attract or prevent the natural enemy with these species. First, let see one of the internet article. "Plants which Protect the Natural Enemy" (http://www.rwn.co.kr/news/articleView.html?idxno=10671) is written by a researcher, Manyoung Choi. 
 
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winged-Engligh grain aphid adult 
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non-winged English grain aphid adult
Englih grain aphid
Hemisphere aphids


О Scientific name : Sitobion(Macrosiphumavenae Fabricius
О English name : English grain aphid
О Size : The body length of winged-one is 2.9mm
О Hosts: Barley, Rice, Rye, Wheat, Sorgho, Crabgrass, Clematis and more.
О Distribution: Korea, Japan, China, Taiwan and North America and more.         


The body length of winged-English grain aphid is around 2.9mm. The body color is dark green and the pattern on its body is reddish brown or brown. Its head is dark brown, stomach is dark green and cornicle is lustrous black. The body length of non-winged one is similar with winged one. Non-winged insect's cornicle is 0.75mm which is cylindrical shape and there is edge.
 
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late-instar English grain aphid nymph
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early-instar English grain aphid nymph
The host plants are Barley, Rice, Rye, Wheat, Sorgho and extra. English grain aphid stay over the coldest season as eggs. Its adult and nymph suck juice from the behind of leaf in the beginning of growth and development of barley. Therefore, when the ear of plant comes out, the density goes up sharply. After the ear of plant grows, adult and nymph parasite and give the plant damage that it cannot take root and if it is worse, it will withered.

The below pictures are the type of enemy insects that can be easily observed around English grain aphid. Generally, I have a theory that "Let use the nature of enemy for free" (individual blog series). We should protect the nature of enemy as much as possible and use them. In other word, we should buy only when harmful insects outbreak. We need to try natural control to reduce cost.. 
 
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ladybug nymph
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aphidiu ervi mummy
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early-instar allpgrapta balteata nymph (it iis molting)

 Translated by Sunyoung Cho

Other articles by Teokgi ParkInterviewed on : 2016.06.01 01:16

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#Hempitera#aphids#homoptera#gramineae

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