| Show making apples stick apples can be made to stick on the trees instead of falling off prematurely and thereby causing much loss to the by spraying them with dilute solutions of some of the recently discovered growth promoting chemicals it has been discovered by a three man rese research ach team working at the united S tates states de department P art ment of agriculture research at beltsville md most effective efa st station a t ion of the spray materials are naphthalene ace acetic tic acid and naphthalene solutions as weak as per cent caused trees to hang onto M more ore than 98 per cent of their fruit while unsprayed ed control trees lost from 64 to 91 per cent |