石硫合剂、敌百虫等药剂对国光苹果花果疏除效应的初步研究

THE PRIMARY STUDY OF THE EFFECT OF APPLYING LIME SULPHUR MIXTURT AND D'lTE REX ON THE THINNING OF THE FLOWERS AND FRUITS OF THE EALL VARIETY APP LES

通过5年不同化学药剂和浓度、不同喷药时期的试验表明,1.0度石硫合剂可以疏除当天开的花。在树体花量过大时,每隔两天喷一次1.0度石硫合剂,能疏除树体中、后期花,有利于节约树体养分和均衡结果。但在易发生苹果花期霜冻的地区,采用疏果比疏花更稳妥。在国光苹果盛花后10天左右,树体喷布敌百虫500倍(加入0.2～0.3%6501型展着剂),能使过多的幼果提前脱落,有利花芽分化,并能提高当年单果重、果实等级和两年平均产量。对化疏不足的树体应辅以人工补充疏果调节。

In five years, usiag different chemicals and different conce ntration, the lime sulptur mixture can be sqrayed once at an interval i-ntoryal of two days, when excessive flowers are grown in tte apple trees, tte flowers of intermediate and later stages can be thined out, in or der t save the nutrient of tte tree and proportionate fruit. But in tte frostbitte area when the apple tree is blosoming thinning fruit is more safe ttan thin-ningolwers. After About ten days, whem Rall variety apple treesaare in full b- loom it cnn be spfayed with dipterex, diluted with water in a propotion, l :500 (adding0.2-0.3% model-6501 spread preapl'ation) the e:ccessive yo-ung fruits will be fall off early. This is advantageous to the flover bud differentiation, it also can promote the weight of each one fruit, the g-rade of the fruit and the average yield of two consecutive years. The tr ?ees had be thined fruit less chemically so that need to thin fruit again, it must be assisted artifitial supplemental thinning fruit as a reguiati-on.