Efficacy of some foliar fertilizers and alternative chemical on the spiny bollworm, earias insulana, boisd. larvae, lepidoptera: noctuidae
2009
El-Naggar, A.Z.
The present study was carried out on cotton variety Giza 70 during two consecutive seasons of 2006 and 2007 in the Experimental Farm of the regional research station, Alexandria, Egypt. The study was to evaluate two foliar nutrients, a plant growth promotor (PGP) and two alternative chemical compounds in addition to a standard insecticide (Chlorpyrifos). All was done to determine the possible use of the above compounds in a program of Integrated Pest Management (IPM) of the spiny bollworm, Earias insulana (Boisd.) beside the effect of each on larval DNA structure and on cotton yield The obtained results indicated that the highest efficacy of the following foliar treatment with Easterna Aminofert / Greenzit S.P,100 / Spinosad have decreased the incidence of spiny bollworm, E. insulana infestation in cotton season 2006. The foliar treatments of Easterna. / Greenzit S P100 with Spinosad or / and Chlorpyrifos were also high efficient in reducing the level of spiny bollworm infestation in season 2007. The application of Easterna followed by Super Biovert and Spinosad in respect increased the cotton yield compared to the untreated control in both seasons of 2006 and 2007. Meanwhile, sprays of Eastern / Greenzit SP100 / Spinosad only increased cotton yield in season 2007. The consequent treatment of Easterna /GreenzitSP100 / Methaxyfenozide and / or Easterna. /Super Biofert / Methoxyfenozide, severely affected the DNA structure of Earias insulana larvae in both seasons.
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