Long-term study on the evaluation of yield and economic losses caused by Prays oleae Bern. in the olive crop of Granada (southern Spain)
نویسنده
چکیده
A 28-year study (1970-1997) of olive trees grown in Granada (southern Spain) has revealed the levels of attack by the olive moth (Prays oleae Bern.), as well as the beneficial action of oophagous predators (Chrysopidae). On the basis of the results, the damage caused by the moth has been divided into three categories, and the yield and economic losses have been evaluated. When the final attack is ‘high’ (more than 40% fruit fall), which occurs approximately one in every three years, the necessity of control methods against the pest should be considered.
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