| Study on the effect of Cyenopyrafen 30% SC against European red mite (Panonychus ulmi Koch) in apple orchards |
| Paper ID : 1099-IPCA5 (R4) |
| Authors |
|
Masoud Taghizadeh *1, Masoud Arbabi2, Mohammad Saeid Emami3, Maryam Forouzan4 1East azarbaijan Agricultural and Natural Resources Research and Education Center 2Iranian Research Institute of Plant Protection 3Isfahan Agricultural and Natural Resources Research and Education Center 4West Azerbaijan Agricultural And Natural Resources Research Center |
| Abstract |
| European red mite, Panonychus ulmi Koch is one of the most important pests of apple trees in some parts of Iran. This pest feeds on cell sap of apple leaves and is caused the yellowing and falling of leaves also yield reduction. In this study, the efficacy of two doses of Cyenopyrafen 30% SC (starmite®) (0.4 and 0.5 ml/l) was evaluated in comparison to common acarisides including spirodiclofen 24% SC (0.5 ml/l), bifenazate 24% SC (0.5 ml/l), flufenzine 20% SC (0.5 ml/l), propargite 57% EC (1 ml/l) in in apple orchards of East Azarbaijan, West Azarbaijan and Isfahan provinces during 2022. The field trials were conducted in randomized complete block design with 6 treatments and three replications. Each replication was containing of four apple tree. Water spray was used as a control. The samplings were carried out one day before and 3, 7, 14, 28 days after spraying by randomized selection of 30 leaves from middle parts of each apple tree and counting the number of alive mites on both sides of leaves. Mortality of mites was calculated using Henderson – Tilton formula and means were compared by Duncan multiple range test. The results showed that there was significant difference among treatments at 1% level. Cyenopyrafen (in both doses) had the highest effect on European red mite compared to other treatments in all apple orchards and was in the first class. Propargite with the lowest effect on European red mite was in third class and other treatments were in the second class. The average percentage of mite mortality caused by Cyenopyrafen from the third day to 28th days was 92.31% to 87.59% at dose of 0.4 ml/l and 96.68% to 90.95% at dose 0.5ml/l. The maximum and minimum difference in the percentage of efficiency for both doses of Cyenopyrafen was about 5%. therefore, Cyenopyrafen (0.4 ml/l) is recommended for controlling this mite, especially in low mite populations and in lower infestations in apple orchards. |
| Keywords |
| Acaricide, Apple orchards, Control, Cyenopyrafen, Panonychus ulmi |
| Status: Abstract Accepted |
