| Popis: |
A study was initiated to develop a method to monitor seasonal emergence of pecan phylloxera, Phylloxera devastatrix Pergande, in Louisiana and Oklahoma. The method used 2.54 cm wide strips of white cloth tape coated with a narrow bead of Tangle-Trap ® that was applied to smooth-barked limbs on the trees. The method proved effective in capturing emerging P. devastatrix. Observations made on emergence indicated an infestation period in both states of about 45–50 d. Emergence started and peaked about 12–14 d earlier in Louisiana than in Oklahoma. In Louisiana, significant differences occurred in the number of P. devastatrix captured by year and tree, and no significant differences were observed in the number captured on a specific cultivar. In Oklahoma, significant differences were observed in the number of P. devastatrix captured across cultivars and between years. No significant differences were observed in the number captured by specific trees. In both states fewer P. devastatrix were captured in 2001 than in 2000. |
