Table 7. Spittle Bug Control, Eldred, 1952 Second brood, sprayed July 18 ============================================================ Treatment Amounts in In 200 terminals 100 gallons July 17 July 21 July 28 ------------------------------------------------------------ Lindane 6 qts. of 20% 123 24 2 BHC 10 qts. of 11.7% 98 11 0 Dieldrin 6 qts. of 18-1/2% 130 19 9 Toxaphene 8 qts. of 58% 107 16 3 Check ------ 99 98 47 ------------------------------------------------------------ Due to the natural reduction in the check by July 28 most attention probably should be given to the July 21 examination. This table shows approximately 92% reduction from Lindane, 87% with BHC, 85% from Dieldrin, and 85% from Toxaphene on July 21. At Anna trees are all very big, from 50 to 75 feet high. They are planted in rows. A regular orchard sprayer was used with 600 pounds pressure using one gun and sprayed from the top of the rig. Approximately 25 gallons was used per tree. As will be noted the dosage was much smaller than at Eldred, and for ordinary use these are probably the proper dosages. Table 8 gives the results of these tests. Table 8. Pecan Spittle Bug Control, Anna, 1952 ================================================================== Treatment Amounts in In 200 terminals 100 gallons July 10 July 14 July 22 ------------------------------------------------------------------ Lindane 1 lb. of 25% 214 1 1 BHC 2-1/2 lbs. of 10% 244 5 9 Dieldrin 1 and 1/3 pints of 18-1/2% 148 3 5 Toxaphene 1 qt. of 31% 146 22 21 Check 61 47 20 ------------------------------------------------------------------- The reduction in the check block July 14 may be due to proximity to the sprayed block which was not true in Eldred. This check was small. Table 8 shows on July 14 an approximate reduction of Lindane 99%, BHC 98%, Dieldrin 98%, and Toxaphene 85%. From these tests in both places it appears that we have a choice of three very good materials, Lindane, Benzene hexachloride called BHC and Dieldrin, and for that reason we can ignore the less efficient material, toxaphene.