-4-


check, no treatment
Captan 50W, 1953
Captan 75W, 1954
Captan 50W, 1955
Captan 50W, 1956
Zineb
Zineb / Captan 1953
Zineb / Captan 1953
Zineb / Captan 1953


2/100
2/100
2/100
2/100
2/100
2Zzoo
2/ l100
1/1/l00


 Results to date: None of the captain sprays has stimulated
 vegetative vigor or increased fruit-set.

6. Fungicide Trial

 Purpose: to determine the effectiveness of various fungicidal
 spray materials in the control of watennelon diseases.


Date of planting: February 16


Variety: Charleston Gray


Treatments: applications were made at 8-24 day intervals;
ranges O,P, and Q received 3 Ep plications and ranges R,S,
and T received 7 applications, with first application 35
days after planting; sticker-spreader used with all treat-
ments; lindane used as needed; ranges Q and T, treatment
rows inoculated with anthracnose and downy mildew; ranges
0 and S, spreader rows inoculated; ranges P and R, not
inoculated; randomized block design, six replications.


Cu, Mn, Zn (34: 8: 8)
Zineb
Nabam / zinc sulfate
Nabam / Cu Mn Zn (2.5:14:14)
Maneb
Zineb / Cu Mn Zn (2.5:14:14)
Check, no treatment
Crag 658
Tribasic copper sulfate


4/100
2/100
2 qts/1/100
2 qts/: 1 1/8 /100
1I/100
1i/ 9/16 /100

2/100
3/100


Results to date: Most prevalent diseases in the plots are
anthracnose, Cercospora leaf spot, and gummy stem blight;
slight amounts of downy mildew are also present; maneb,
zineb, and nabam plus Cu Mn Zn appear to be slightly superior
in overall leafspot control to nabam plus Zn SOI and much
superior to the copper fungicides (Crag 658, tribasic copper
sulfate,. Cu Mn Zn), which are particularly ineffective against
anthracnose.