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Paper Information

Journal:   PAJOUHESH-VA-SAZANDEGI   FALL 2007 , Volume 20 , Number 3 (76 IN AGRONOMY AND HORTICULTURE); Page(s) 25 To 31.
 
Paper: 

EFFECTIVENESS OF 12 PESTICIDES AGAINST TWO INFESTATION LEVELS OF BEAN FIELDS BY TETRANYCHUS URTICAE KOCH IN LORDEGAN, CHAHARMAHAL AND BAKHTIARI PROVINCE

 
 
Author(s):  SAEIDI Z.*, ARBABI MASOUD
 
* PLANT PROTECTION DEPT., AGRICULTURAL AND NATURAL RESOURCES RESEARCH CENTER, CHAHARMAHAL AND BAKHTIARI PROVINCE, SHAHRE KORD, IRAN
 
Abstract: 

Tetranychus urticae reported as a major pest of bean in Lordeghan (Chaharmahal and Bakhtiari province) and other bean growing area in Iran and world. Spider mites cause noticeable damage on quality and quantity of bean. In these study effects of 12 pesticides (acaricides/insecticides) on T. urticae, a major pest of bean in Lordegan, was evaluated under field conditions. Two ovicides (Tetrandifon EC 18.5%, Clofentezine, SC 50%), one acaricide which controlled immature stages of the mite (Etoxazole SC10%) and nine acaricides/insecticides which were effective on both immature and adult stages of the mite (Amitraz EC 20%, Propargite EC 57% and 570 EW, Fenpropathrin EC 10% and FL 10%, Fenazaquin SC 20%, Hexythiazox EC 10%, Fenpyroximate SC 5% and Bromopropylate EC 25% were evaluated during 2002-2003. Split plot experiment was used for the field trail. Spraying time was selected as the main factor with two levels of mite infestation (20% and 40% of leaves infestation). Sampling was done one day before, 3, 7 and 14 days after pesticides application. Fourthy five leaves of each treatment (15 leaves of each replication) were sampled. Number of alive mites was counted in two squares centimeter on abaxial leaf surface of bean using Stereo binocular microscope. Statistical analysis was done on mortality percent obtained by Henderson-Tilton formula showed that, there was significant difference between two levels of infestations. Mortality percent at 20% was found significantly higher than the other level of infestation. Effects of pesticides applied significantly were found different at sampling intervals. Etoxazole and Hexythiazox caused higher mite mortality than the others fourteen days after application. Where as effects of Fenazaquin, Bromopropylate, Amitraz, Clofentezine, Tetrandifon, Propargite old and new, Fenpropathrin old and new formulas, Fenpyroximate on T. urticae observed after them respectively. Using proper doses of pesticides and proper time of application in bean fields infested by spider mite, will considerably reduce amount and cost of pesticides application and keep agro -ecosystem away from further pollution.

 
Keyword(s): ACARICIDES, TETRANYCHUS URTICAE, BEAN, INFESTATION LEVEL, LORDEGHAN, CHAHARMAHAL AND BAKHTIARI PROVINCE
 
References: 
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  Persian Abstract Yearly Visit 54
 
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