118 STATE HORTICULTURAL SOCIETY. 



found at any time. No remedy is known. When once introduced into a 

 field, the whole crop should be burned and no tuber from the field used 

 for seed purposes. The field itself should not be used for potatoes for at 

 least six or seven years and the disease should be reported together with 

 specimens at the first outbreak or suspicion of outbreak to the Depart- 

 ment of Botany, Michigan Agricultural College. 

 Send specimens in a tight mailing-case. 



GENERAL TREATMENT FOR TOMATOES. 



The Leaf Blight {Septoria lycopersici Speg.), caused serious losses 

 in some tomato growing sections last season. This disease can be easily 

 and cheaply controlled by proper spraying and growers should be 

 equipped to do this important work. 



In a test made last season by the Horticultural Department on the 

 farm of Mr. G. C. Raviler at Plymouth, the best results were secured 

 from four sprayings of Bordeaux mixture made with five pounds of 

 copper sulphate, four pounds of stone lime and fifty gallons of water. 

 The first spraying was made about a month after the plants had been 

 set out and repeated evei'y ten days or two weeks so that the new foliage 

 was protected. 



GENERAL TREATMENT FOR MUSKMELONS AND CUCUMBERS. 



To protect these plants from fungous diseases spray with bordeaux 

 mixture made with two pounds of copper sulphate, four pounds of stone 

 lime and fifty gallons of water. 



Begin spraying when the vines have runners a foot long and repeat 

 once a week or every ten days as long as pickings are made. 



Thorough sprayings of muskmelons and cucumbers will undoubtedly 

 be a paying practice in most seasons. 



Several insects interfere with the welfare of cucumber and melon vines. 

 The cucumber beetle (striped) feeds on the leaves, and the young tunnel 

 as grubs in the roots. Plant more seeds than are needed to produce vines 

 and then thin out injured plants and dust with hydrated lime and flour 

 of sulphur, (one of sulphur to five or six of lime) through coarse cloth. 

 Some prefer arsenate of lead powder mixed with nine parts of hydrated 

 lime. About the bases of the vines on the ground throw some tobacco 

 dust to prevent beetles from laying eggs on stems. Paris green is not 

 reliable on these tender vines. 



The cucumber louse usually starts in a few hills and then spreads 

 over the field. Cold, wet weather being favorable to the louse. Some 

 prefer to bury the first few vines attacked to retard spreading. A good 

 spray is Persian insect powder, 1/2 oz. to a gallon of water, spraying up- 

 ward from beneath. The difficulty lies in getting the spray on to the 

 lice. Each louse must be fairly hit to be killed. 



