Effect of Chaetoptelius vestitus on the chemical compostion of pistachio seed (Pistacia vera) harvested Bechloul (Algeria)

It is noteworthy that in the fruit pistachio orchard Bechloul two types of pistachio fruits are available namely the following healthy tree seed and the second type comes from tree attacked by wood-boring. For this purpose, a comparative study that will focus on the nutritional value of each type of seed on the water con- tent, dry matter content, the determination of crude protein, the rate of crude fat, and the determination of sugars .The total analysis results pistachio seeds infested Chaetoptelius vestitus not reveal solids content with an average of 3.60 plus minus 0.45 per cent. Regarding the dry matter content of seeds from trees infested by xylophagous, it is 3.85 plus minus 0.12 per cent. There was no significant difference between the dry matter after pistachio control seeds and trees infested with wood-boring because the probability Pr 0.05 is greater than 0.228 for a 95 per cent confidence interval. The water rate control of seeds is 7.21 plus minus 0.36 per cent. For pistachio seeds taken from trees infested the percentage of water reached 7.63 plus minus 0. 8 per cent. The analysis of variance on the water content contained in the control trees and pistachio seeds infested by xylophagous shows that there is no significant difference, the probability (Pr) is 0.57, greater than 0.05 for a confidence interval equal to 95 per cent . In this study the average fat content of 47.1 plus minus 1.21 per cent for controls pistachio seeds. It is 45.4 plus minus 2.09 per cent for the seeds of pistachio trees from infested. In this study the analysis of variance of the fat content of the seeds from witnesses pistachio fruit trees and those infested Scolytidae, shows that there is a significant difference because the probability is 0.04 or less than 0.05 for a 95 per cent confidence interval. As for the average rate of sugars, it is 3.9 plus minus 0.49 per cent for the fruit pistachio seed witness. The sugar rate is 5.4 plus minus 0.88 per cent in fruit pistachio seeds harvested from infested trees. The analysis of variance of total sugars between the seeds of the fruit pistachio wit- ness and those of infested trees bud borer shows that there is no significant difference since the probability is therefore 0.50 greater than 0.05 (95 per cent confidence interval). Proteins rate reached 39.5 plus minus 2.88 per cent in the control seeds. One of infested seeds is 21.1 plus minus 6.48 per cent. Analysis of variance between proteins pistachios seeds harvested from control trees and those from trees infested seeds shows that there is a significant difference considering the fact that the probability 0.007 is less than 0.05 for a 95 per cent confidence interval. The total nitrogenous matter is 6.2 plus minus 0.99 per cent in the control pistachio seed. The percentage of total nitrogen matter, it is 4.8 plus minus 0.21 per cent in seeds from trees infested Chaetoptelius vestitus