-7- 



has been cr<;atod to supply interested parties with mulberry slips and silk 

 worm eggs,, v/ithout Ciiargc. (The only justification for including this item 

 in Fruit Notes is the fact that the mulberry is a fruit bearing tree as well 

 as a source of food for silk wonns.) 



DO YOU KNOW 



That certain insects are attracted to some colors more than others? 

 Federal entomologists report that Japanese beetle traps painted yellow are 

 definitely superior to those painted green and white, aluminum, white, light 

 yollow, light blue, dark blue, pink, red, orange, reddish orange, and various 

 shades of green. 



That it takes as much as 500 lbs. of water to develop 1 lb. of dry 

 \matter in a plant? A more or less continuous stream of water is taken in by 

 the roots and transpired by the leaves throughout the season. The actual 

 araount of v;ater per pound of dry matter varies with different plants. It 

 also varies with nutritional conditions. A plant well supplied with nitrogen, 

 for example, may use water somewhat more efficiently. 



Thai various fungus diseases of raspberries' are likely to be more 

 troublesome in a dense, drov.'ded planting? There is some evidence to show that 

 a single rov; of canes instead of a wide i.atted rov; will make control of diseases 

 such as spur blight considerably easier. At any rate, the rov; of canes ought 

 not to be wider than a foot or 15 inches at the bottom. 



That the least expensive mulch material which an apple grower may ob- 

 tain is that vjhich groves between the trees. This material involves a minimum 

 of transportation which emphasizes the importance of treating the orchard soil 

 in such way that a hoav;,' -rowth of grasses, clovers, or other vegetation is en- 

 couraged. 



That a simple priroiple of physics may be applied in measuring the 

 influence on cedar runt infection, of red cedar trees at different distances 

 from an apple tree? It is a v/ell known fact that the intensity of light 

 varies inversely as the square of the distance from its source. The spores 

 from the cedar apples might be considered as being disseminated in all direc- 

 tions from the red codar tree in the same way that light spreads in all di- 

 rections from a candle. An area 100 feet away would tend to receive four 

 times as nany spores as a similar area 200 feet away. This emphasizes the 

 importance of eliminating red cedar trees near an orchard of susceptible 

 apple varieties. (A IVealthy tree immediately adjacent to a red cedar tree 

 was recently observed. As might be expected, the Vifealthy leaves were almost 

 entirely covered with rust spots.) 



That the harvest season is an ideal time to evaluate one's pruning 

 methods? The nu:aber and location of small, poorly colorec. apples should remind 

 us which branches or parts of branches need attei..;ion during the pruning season. 

 In older trees, the dovmwar . grov;ing parts of branches are almost always older 

 and are also poorly located from the standpoint of exposure to light. Removal 

 of drooping limbs should receive attention whener-Tir such a tree is pruned. 



