Study On Fruit Cracking And Prevention Technology Of Grape Munake

In order to grasp the Munake grape fruit cracking mechanism and scientific prevention and treatment of cracking, with ‘White Munake' grape as the object of study of ‘White Munake' and ‘White Seedless' between six varieties of grape fruit for the differences in the organizational structure, analysis the relationship between moisture content and fruit cracking and cracking test treatment on fruit growth, fruit, fruit quality, the main research results are as follows:?1? The varieties of easily dehiscent fruit were ‘Red Munake', ‘White Munake' and ‘White Seedless', the varieties of not easily dehiscent fruit is ‘Kyoho', ‘Muscat Hamburg' and ‘He tianhong.?2? In the early growth stage of grape?third 102 d after anthesis? fruit cracking, and fruit length and diameter and single grain weight increased rapidly with and enhanced. Spraying CaCl₂ and GA3 can enhance the fruit firmness, improve the ability of crack resistance, and the increase of GA3 treatment on fruit hardness is higher than CaCl₂.?3? In the late stage of fruit development, soluble solids content is high, after rainfall, the fruits will short time rapid water absorption, fruit turgor pressure increases rapidly, prone to cracking. Artificial rainfall and in vitro fruit dipping time and water absorption rate is proportional to, and water absorption rate and fruit cracking were also positively related.?4? The thickness of cuticle cracking Munake grape is significantly less than the normal fruit, cells arranged uneven fracture. Cracking the epidermis, the sub epidermal cells arranged in neat and compact degree is very low. Small fruit pulp cells, peel and flesh with loose, normal fruit bundle should be thick and uniform.?5? Spraying 30 mg/L GA3,0.2% Ca Cl₂ and fluid gold calcium, pericarp thickness, fruit peel and flesh cell size and arrangement close degree increase, can effectively reduce the rate of dehiscent fruit, blue and white ear of woven bags are no dehiscence and fruit quality was excellent, anti cracking effect significantly.