leaf spot disease ( Leaf Bligh ) .

leaf spot disease ( Leaf Bligh ) .Cause : The fungus Helminthosporium turcicum . Symptoms on leaves appear elongated and irregular patches of yellow and brown color surrounded , spotting develoJasa Pembuatan Makalahps and extends from the leaf tip to the leaf base , the original patches were wet , then change color to yellowish brown , then changed to dark brown . Finally, the entire surface of the leaves turn brown . Control : ( 1 ) crop rotation in order to reduce the spread of the fungus ; ( 2 ) mechanically by adjusting the soil moisture so that the land is not humid conditions ; ( 3 ) with chemical fungicides .
c ) Rust disease ( Rust ) ;Cause : The fungus Puccinia sorghi Schw and Puccinia polypora Underw . Symptoms : the mature plant is the leaves that are old are dotted brownish red stains like rust and there is a brownish yellow powder , powder fungus then develops and extends , eventually rust can turn into a variety of shapes . Control : ( 1 ) regulate the moisture in planting areas ; ( 2 ) planting resistant varieties ; ( 3 ) perform sanitation ( 4 ) use of chemical pesticides such as downy mildew and leaf spot .d ) Disease -footed swelling ( Corn Smut / boil Smut ) ;Cause : The fungus Ustilago maydis ( DC ) Cda , Ustilago zeae ( Schw ) Ung , Uredo zeae Schw , Uredo maydis DC . Symptoms : on the cob is marked by the entry of the fungus into the seed resulting in swelling and release gland ( gall ) , this causes swelling pressed up wrapping and packing gland broken out of the wrapper and spread spores . Control : ( 1 ) regulate moisture corn planting area by means of drying and irrigation ; ( 2 ) cut the plant and then burned ; ( 3 ) seeds to be planted evenly mixed with fungicides .e ) cob rot disease and rotten seed ;Cause : The fungus Fusarium or Gibberella zeae Gibberella include ( Schw ) , Gibberella fujikuroi ( Schw ) , Gibberella moniliforme . Symptoms can be seen after opening the wrapper cob , corn seeds , pink or brownish red then turns into a tan brown color . CoJual Website Murah ntrol : ( 1 ) corn planting improved varieties, cropping rotation is done , adjust spacing , seed treatment ; ( 2 ) spraying with a fungicide after symptom onset was found .7 . HARVEST