Interlaced Influence of Various Water Quantities and Mite Densities on Broccoli (Brassica Oleracea.) Production

Abstract

This study was carried out at Faculty of Agricultural- Suez Canal University which located in north eastern Egypt, within the Governorate of Ismailia. The experiment was conducted to assess the influence of different amounts of water and mite densities (phytophagous & predaceous ) on Broccoli production. Thus; the factor of water amounts comprise into three treatments (Q₁, Q₂ and control ) with average (977.63, 1955.28 and 2371.5 m³/fed.) respectively during period December  2014 to April 2015. The results revealed that The water quantities have a significant influence on Phytophagous and Predacieous mites  where the highest mean value for mites density was observed with ( Q2 ) by (10.5N/in²) and (8.16 N/in²) for Phytophagous and Predacieous mites respectively. On the other hand; the density of Phytophagous mite by ( 1 n/in²) need approximately 167.12, 134.18 and 154.82 heat units under treatment Q1, Q2 and C respectively.  However; Predacieous mite density (1n/in²) needs for 269.38 heat units under Q1 and 172.23 heat units under both Q2 and C treatments. Furthermore; the value of yield under treatment Q2 was the highest value (9.017 ton / fed) comparing with others treatment’s values (7.91 & 5.04 ton/fed) for (Q1 and Control respectively). However; with treatment Q1 recorded a highest Irrigation water use efficiency ( IWUE ) by (7.96 Kg/m³) after obtaining Heat use efficiency (HUE) 5.5 heat unit. Thus; from previous data analysis that best treatment is Q1 (low amount of water) which gain a good value both (IWUE) and (HUE).

Keywords:  water quantities; mite densities; Irrigation water use efficiency and broccoli production.