Study on efficiency of Cryptolaemous montrouzieri Muls. to control of Pulvinaria aurantii Ckll.
2013
Aghajanzadeh, Sirous | Fazel Hallaji Sani, Mohammad | Golamian, Esmail
Orange pulvinaria scale, Pulvinaria aurantii Ckll., is one of the most important pest on citrus in north of Iran. At present, the farmers use chemical control methods to prevent crop losses by the pest. Using effective natural enemies has a special importance in controlling of this pest. The present investigation was conducted to determine the efficacy of coccinelid beetle, Cryptolaemus montrouzieri Muls. (Col.:Coccinellidae), against orange pulvinaria scale in screen house and citrus orchard. The treatments were conducted in three different experiments with a completely randomized design. The result of first experiment revealed that the feeding rate of adult coccinelid beetle (each pair) from egg sac of orange pulvinaria scale was 35 in a month. The results of second and third experiments revealed that the treatments were significantly different from each other (P0.01). The result indicated that the best treatment in these experiments was twice ladybird beetle releases (one pair in the beginning of oviposition and another in the peek of egg sacs) in controlling this pest's population. Key Words: Pulvinaria aurantii, biological control, Citrus, Cryptolaemou montrouzieri : Abstract
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