The Studies On Mechanism And Control Of Apple Watercore

Apple watercore is a physiological disease of apple fruit. Recently apple watercore have spread rapidly in major apple product area. Lead to the quality of apple have droped and the natural capacity of store have reduced. The yield have been affected. Through experiments that spray different fixed calcium trials, utilize different fertilizers in soil , spray different nutritive element and spray calcium different time so to establish inducing reason and comprehensive control methods of apple watercore. The result of trial showed:1,Different variety that the extent of watercore is different. Golden fu' s watercore is most serious in apple. Next is Chang fu 2 and Marshal is lightest.2,The control effects of High Effective Bugaibao and the Amino acid calcium better than of the Ca(NO₃)₂. The investigation showed after having stored in the stable temperature storage for 15 days that the watercore index by spraying Effective Bugaibao, Amino acid calcium and Ca(NO₃)₂ reached 2.2, 4.4 and 6.7, While CK treatment reached 17.8. At the same time, the watercore rate reached 6. 7%, 13. 3% and 20. 0%. The CK treatment reached 52. 0%. The result showed after having stored for 150 days that the watercore index by utilizing three kinds of treatments reached 12. 8, 20. 6 and 34. 4. While the CK treatment reached 48. 2. Likewise, the watercore rate reached 38. 4%, 61. 8% and 66. 8%, the CK treatment reached 95. 4%.3,The result of experiment showed that add to manure in soil can control efficiently apple watercore. The control effect by utilizing full of manure treatment is the best methods and the watercore index, watercore rate reached 4.2, 12.0%, while the CK reached 38.7, 86.0%. Having a significant difference between the CK. The watercore index and rate by utilizing half of manure treatment reached 15. 8 - 21. 6 and 39. 3% - 49. 3%. It have a notable difference or extremely notable difference among the full of manure treatment and the CK treatment.4,The result showed of spraying different nutritive element that after having stored for 30 days that the every handle's watercore index have not notable difference. The watercore rate of spraying B have a extremely notable difference among spraying N and different N/Ca, and have a notable difference between the CK treatment. After the fruit stored for 150 days, the watercore index of spraying B reached 46.7 and spraying N/Ca=20:1 reached 55.6, their watercore index have a extremely notable difference between the handle of spraying N/Ca=5:1, have a notable difference among the handle of spraying N/Ca=10:1 and CK treatment. But their watercore index have not difference among the handle of spraying N,P,K,Ca. The result of analyzing and investigating for watercore rate showed in all handle that spray N/Ca=20:1 is most serious. It' s watercore rate reached 100%, it have a extremely notable difference among the other handle. Between these handle of spraying different nutritive element have not notable difference. Their watercore rate reached 40%-80%.5,The result showed of spraying calcium time that after having stored for 15 days that 5 times and 4 times had sprayed High Effective Bugaibao could control efficiently apple watercore. Their watercore index is 32.60 and 46.67. Three times and two times had sprayed High Effective Bugaibao that watercore index is 80.53 and 83.97. Their watercore index have not notable difference. Between one times had sprayed High Effective Bugaibao and CK have not notable difference, their watercore index are 100.