Plant Health Plant Diseases and Pests and their Management
مفالات متعلقه
أعفان الكيزان:
تسببه الفطريات Fusarium spp., Aspergillus flavus
أعراض الفيوزاريوم عفن حبوب ذو لون وردي الي بني محمر مغطي احيانا بنموات الفطر القطنية الوردية اللون، بينما يسبب الفطر اسبرجلس عفن اصفر مخضر، وتشع الحبوب المصابة غالبا لون فلورسنتي اذا تعرضت لأشعة فوق بنفسجية ultraviolet light (black light) دليل علي تكون الأفلاتوكسينات السامة، وتساعد الحشرات والجفاف علي انتشار المرض
Corn Ear Rots
(fungi Fusarium spp., Aspergillus flavus)
Fusarium ear and kernel rot causes a pink to reddish-brown discoloration of individual kernels or groups of kernels. A powdery or cottony-pink growth may develop on infected kernels, especially around channels made by insect larvae
Aspergillus flavus causes a greenish-yellow mold growth on the surface of infected grain. Most infected corn characteristically emits a bright blue-greenish-yellow fluorescence when exposed to high intensity, ultraviolet light (black light). However, this does not necessarily mean that the poisonous by-product aflatoxin, has been produced by the fungus. Laboratory assays are required to determine levels of contamination. Field molding and aflatoxin contamination have been associated with production stresses and insect damaged ears.
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