INSECTICIDAL EFFECT OF SOME INART DUSTS AGAINST THREE OF STORED GRAIN INSECTS AT KAFER EL-SHEIKH GOVERNORATE

Abstract: Laboratory and field studies were conducted to evaluate the effect of three inert dusts , diatomaceous earth , kaolin and katelsous as wheat grain protestants against some stored grain insects ,i.e., Sitophilus oryzae ,Rizopertha dominica and Tribolium confusum . Inert dusts were mixed with wheat grain in the laboratory at different concentrations . Data obtained from the laboratory experiment showed that the LC50, S of diatomaceous earth, kaolin and katelsous were 0. 234 , 0.071 , and 0.235% w/w , 6.033 , 6.306 and 8.938 % w/w and 0.495 0.496 and 103.875 %w/w against S. oryzae R. dominica and T. confusum, respectively one day after treatment . Diatomaceous earth was more effective than the other tested materials where it achieved complete mortality for the three tested insects after two days of treatment at the rate of 0.5%wlw. Results also showed that kaolin and katelsous act slowly on the tested insects were the higher rates of 8% w/w for kaolin and 0.4%w/w for katelsous gave complete mortality after one week post treatment for the field study ( at farmers ,storage ), the higher concentration ( 0.5,8 and0.4 % w/w ) of the three dusts diatomaceous earth , kaolin and katelsous, respectively obtained for laboratory experiment were admixed with wheat grain and stored for 4 months at the farms . For the field experiment , the results showed that diatomaceous earth gave 100% , 91.6 % and 98.2 % mortality against the three tested insects , respectively after 4 months of storage at a concentration of 0.5 % w/w 7 th day of exposure kaolin at 8 % w/w showed that adult mortality deceased from 100 % at zero time of storage after 5 days of exposure to 13.7 % ,27.1 % and 16.9 % at 4 months of storage after the same period of exposure against the three insects , respectively at the same time of exposure . In general the results obtained showed that the diatomaceous earth had the most activity followed by katelsous and kaolin against the three tested insects . Also , the degree of effectiveness decreased with the increasing of storage periods .
Publication year 2010
Organization Name
serial title مجلة وقاية وأمراض النبات
Author(s) from ARC
Agris Categories Protection of plants - General aspects
AGROVOC
TERMS		 Pesticidal properties. Sitophilus oryzae. Tribolium confusum.
Publication Type Journal
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