Relation of Weather Conditions to Onion Blast.
نویسنده
چکیده
During the recenit period ineluding the years of 1925 to 1940 there have been seven years in which the crops from onion seed suffered a serious leaf injury resulting in low yields. The disease is apparently physiological, for there has not been a single instance in either past or recent investigations that showed the presence of a pathogen when the plants exhibited the first signs of injury. The hypothesis that the causal agent is a certain combination of weather conditions has been substantiated by observation and also by laboratory experiments simulating the environmental factors that approximate the weather conditions prevalent preceding and during the appearance of the injury. Onion blast symptoms
منابع مشابه
تأثیر فاکتورهای آب و هوایی بر اسپورزایی قارچ عامل بیماری بلاست برنج در استان گیلان
A comprehensive study is underway now to determine the predicting factors of rice blast and its loss assessment in Guilan province. In a preliminary study, the effect of climatic factors on spores population and forecasting the disease were considered. So, during cultivation season of 2006 and 2007, some fields were chosen five kilometers away from weather stations in three regions of Guilan, i...
متن کاملتأثیر فاکتورهای آب و هوایی بر اسپورزایی قارچ عامل بیماری بلاست برنج در استان گیلان
A comprehensive study is underway now to determine the predicting factors of rice blast and its loss assessment in Guilan province. In a preliminary study, the effect of climatic factors on spores population and forecasting the disease were considered. So, during cultivation season of 2006 and 2007, some fields were chosen five kilometers away from weather stations in three regions of Guilan, i...
متن کاملExploring the Relation Between Imagery Ability and Performance While Doing Anticipation Tasks in Different Weather Conditions: The Case of Army Student Pilots
Background and Aim: The purpose of this study was to compare the accuracy of military students performing prediction tasks under different weather conditions and also to investigate the relationship between the ability of mental imagery and the ability to predict these students. In addition, in this research, a comparison was made between the ability to predict pilots and other students. Method...
متن کاملInhibitory Effects of Aqueous Onion and Garlic Extracts on Growth and Keratinase Activity in Trichophyton mentagrophytes
The effect of onion and garlic extracts on fungal growth and keratinolytic activity was studied in Trichophyton mentagrophytes as one of the major etiologic agents of human and animal dermatophytosis in Iran and other parts of the world. In order to find out the best keratinase producer for further steps, culture conditions for 30 strains of T. mentagrophytes isolated from human dermatophytosis...
متن کاملOp-enve160090 1115..1122
Onion thrips, Thrips tabaci Lindeman, is a significant pest of onion crops worldwide, but little is known about its patterns of aerial dispersal in the context of abiotic environmental factors. Thrips tabaci adults were passively collected from the air column above onion fields in western New York using clear sticky cards over a series of sampling periods in 2012, 2013, and 2014 while on-site w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Plant physiology
دوره 19 1 شماره
صفحات -
تاریخ انتشار 1944