บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Pre-harvest sprays and post-harvest fruit dips influence fruit drop, harvest quality, and cold storage of apples and peaches

R.E. Byers, D.H. Carbaugh and L.D. Combs

Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. Abstract S09-P-18. pp. 232.

2002

บทคัดย่อ

Pre-Harvest Sprays and Post-Harvest Fruit Dips Influence Fruit Drop, Harvest Quality, and Cold Storage of Apples and Peaches

Aminoethoxyvinylglycing (AVG) sprays inhibited ‘Arlet’ fruit drop, increased pull force, and delayed the loss of fruitfirmness, starch, fruit shriveling, and red color.1-Methylcyclopropene (MCP), applied as a gas or spray, did not affect fruit drop or pull force.The combination of AVG + MCP (spray or gas) provided better control of fruit drop, loss of fruit firmness, starch degradation, and loss of pull force than AVG alone.Thirtyfive days past the optimum harvest date, fruit from trees sprayed with AVG + MCP was maintained at 74 neutons firmness compared to 61 neutons for the control.Eventually,treated fruit increased 2.5 cm in fruit diameter in the 35 days after the optimum harvest date. NAA, dicamba, floroxypyr, cyclanilide, and AVG inhibited fruit drop of ‘Law Rome’ , ‘Redspur Delicious’ , and ‘Golden Delicious’ , but cyclanilide or MCP did not.Dicamba + AVG + MCP provided the best control of fruit drop.Treatment combinations containing AVG inhibited the loss of firmness, starch, and percentage of fruit and the amount of red vascular bleeding into the cortex.When stored at 210C for 2 to 6 weeks,‘NuRed Rome 262’ dipped in Mertect did not affect fruit firmness, starch, % rots, but increased soluble solids.MCP (gas or dip), MCP (gas or dip) + Mertect, or AVG + Mertect inhibited loss of fruit firmness and starch and reduced fruit rots, but cyclanilide + Mertect did not.Approximately 60 days after harvest, fruit dipped in AVG + MCP + Mertect on Sept 26 were still 92 neutons firmness on Nov 11; whereas, untreated fruit were only 53 neutons.When stored at 210C for 10 days ‘Cresthaven’ peach fruit dipped in Scholar fungicide, MCP did not affect fruit firmness or soluble solids.Fruit dipped in AVG, AVG + Scholar, or AVG + MCP + Scholar substantially inhibited loss of fruit firmness (Control = 9 neutons vs. AVG + MCP + Scholar = 45 neutons).