EFFECT OF N P K AND THEIR COMBINATIONS AS SOIL FERTILIZERS ON TOMATO INFESTATION WITH CERTAIN INSECTS. | ||
| Egyptian Journal of Agricultural Research | ||
| Volume 71, Issue 1, March 1993, Pages 195-205 PDF (2.38 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1993.455765 | ||
| Authors | ||
| HAFEZ I. H. OMAR; MOHAMED F. HAYDAR; FERIAL M. L. AFIFI | ||
| Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||
| Abstract | ||
| The effect of the major plant nutrients, NPK and their combinations on tomato infestation caused by Myzus persicae Sulz., and Thrips tabaci Lind., was studied in field experiments in Etay El-Baroud Agricultural Research Station, El Beheira Governorate. An obvious increase of these pests was observed on plants treated with superphosphate ( 16% P2 05, 300 kg/f) either alone or in mixtures with potasisum sulfate (48% K20, 100kg/f) and ammonium sulfate (21%, N,300 kg/f). The corresponding levels of infestation with potassium sulfate and ammonium sulfate whether alone or in mixtures were less pronounced. The use of P fertilizer had improved the development of the tomato plants , thus encouraging the aphids and thrips migration and subsequently reducing leaf deformation. | ||
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