The experiment was laid out in Randomized Complete Block Design (factorial) with three replications having net plot size 3x4m=(12m 2). The effect of three sowing dates 25 th October, 10 th November and 25 th November on three hybrid maize varieties Pioneer 1543, Syngenta 4841 and Monsanto DK-6142 was studied. Yield components and grain quality parameters such as plant height, number of cobs per plant, cob length, grains per cob, grain yield, protein, starch and oil content of maize varieties were significantly affected by different sowing dates. It was concluded from the finding of present research work that all quantity and quality traits were promising when the sowing was completed up to 25 th October. Further delay of the sowing had negative effects on the performance of quantity and quality of maize. Hybrid maize variety Pioneer 1543 was promising variety which gave the grain yield more than 8312 kg ha-1 .

The survey on various parameters showed that the degree of orchard infestation fluctuated by time period/seasons, so attack of red palm weevil varied on different months of the year during the study period. It was observed that this insect pest had significantly higher (16%) infestation in the months of June, July and August, during experimental period. The least attack (8%) of the weevil was in the months of January, September, October, November and December in both the years (2007 and 2008). Place of infestation of weevil on date palm stem revealed that the pest infestation was mostly concentrated at the base of trunk (up to 50 cm height) and 75 to 82% of total weevil infestations were located at the base of palm trunk. Spirotetramat insecticide was found most efficient treatment to control red palm weevil infestation/damage, which recovered (43%) damaged date palm trees, followed by Fipronil (33%), Chlorpyrifos (26%) and Methidathion (19%) during the year 2007 and 2008.