The effect of some organic soil amendments such as cattle, poultry and sheep manures and four insecticides nudrin 90%, selecron 72%, tracer 24% and vertmik 1.8% and their interaction on sugar beet productivity and the infestation rate of beet fly, P. mixta were carried out at Damanhour and Nubariya regions under field conditions. The results raveled that population density of P. mixta, root yield, top yield, sugar yield and quality parameters were significantly affected by all organic manures and insecticides treatments. Generally, the highest accumulative larvae of P. mixta recorded with poultry manure followed by cattle manure and sheep manure in Damanhour and Nubariya regions. Also, in two locations poultry manure gave remarkable results in suppression in root, top and sugar yields as well as sucrose and purity% compared with cattle and sheep manures. All tested insecticides in the two locations significantly reduced the population density of beet fly, P. mixta on sugar beet plants in comparison with the cheek treatment. Sugar beet plants sprayed by selecron 72% the reduction% of P. mixta population increased with the time elapsed treatment. Selecron 72% was the most effective against P. mixta followed by tracer 24%, vertmic1.8% and nudrin 90%. Also selecron 72% was ranked the first in root and top yield, however, sugar yields gained the highest value by tracer treatment. Top, root and sugar yields, T.S.S.% and purity% were significantly affected by the interaction between tested organic manure, and insecticides. The highest top, root and sugar yields were obtained with (cattle manure x selecron 72%), (poultry manure x tracer 24%) and (cattle manure x tracer 24%) treatments, respectively. However the highest values of T.S.S. and purity% were obtained with (poultry manure x tracer 24%) treatment.

Two field experiments were carried out in km 71 West Alexandria-Cairo desert Road during 2014/15 and 2015/16 seasons to study the response of some multigerm sugar beet varieties i.e., Top, Sultan and Kawemira to foliar spray with compost tea at three levels of (0, 15 and 20 L/fed/300 L water) at 45 and 75 days from sowing. The experimental design was a split plot design with three replicates, foliar spray with compost tea levels were arranged in the main plots and sugar beet varieties were allocated in the sub plots. The results showed that foliar spray with the level of 20 L/fed with compost tea significantly increased root length, diameter, fresh weight/plant, sucrose%, purity%, root and sugar yields/fed in both seasons, while, decreased root mineral contents (α amino N, Na and K %) as compared with zero treatment (control) or 15 L/fed level of compost tea. The Three tested varieties were differed significantly in the root length, diameter, fresh weight/plant, sucrose%, purity%, root and sugar yields/fed and root mineral contents. Kawemira variety surpassed the other two varieties (Sultan and Top) in the most traits in both seasons. Foliar spray with compost tea increased the numbers of two sugar beet insects, beet fly (Pegomya mixta Vill.) and tortoise beetle (Cassida vittata Vill.). Kawemira variety was less attracted by the two previous insects, during two successive seasons. Moreover foliar spray with compost tea at level 20 L/fed recorded the highest values for sucrose %, root and sugar yields/fed in both seasons. Generally, it could be recommended that sown Kawemira, Sultan and Top varieties, respectively and sprayed with 20 L/fed compost tea produced the highest sucrose%, root and sugar yields/fed and yield quality in a sandy soil.

The aim of this investigation was protection the sugarcane breeding varieties from infestation with the pink stem borer , S. cretica Led, at El-Sabahia Station , Alexandria . G 85-37variety (95 borers/100 plants) was more susceptible to infestation with the pink stem borer in two seasons . Moreover G85-39 was the most resistance to this borer (24 borers /100 plants) in the same seasons. There were significantly among varieties value as susceptibility to infestation by S. cretica . The leaves weight of G85-37 variety was the highest recorded (1312 gm ) in weight leaves value in both seasons. On other hand, the Co214 (775gm )was the least one in same character. Stalks weight character was significantly lower among varieties in both seasons. The highest total soluble solid (T.S.S) value was appointed in 1 st season by G85-39 (20.67).While it was low by F153 (16.33)&(16.17) in both season respectively. During the season 2006/2007, the evolution of 4 insecticides and 2bioinsects were done. In the third day the Dipel 2x (B. th. krustaki ) reduced the population of S. cretica by 19.33% in first period time (three leaves stage) and 16.67% in second period (Harvest time ). While reduction % was 0.0 % by B. bassiana ( Bio fly) in both period. Lannate reduction percentage was more toxicity (91%) than Carbaryl (80.67%) in same period . In three leaves stage (1 st period test) the Profenofos was very effective at third day (92.33) . Bio-insecticides were more toxic in last priod(21day) for test at two application periods In addition, Dipel 2x ® is more toxic than (Bio fly ® ) . Organophosphours insecticides increased the sugarcane yield character than another tested insecticides. IT could be concluded that all tested insecticides could be used against S. cretica .Using chemical insecticides gave fast reduction of then Bio-insecticides which are safety and less pollution than chemical insecticides.

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