Table 6. Spittle Bug Control, Eldred, 1952 First brood, sprayed May 23, examined June 9
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Treatment Amount in Spittle masses
100 gallons 800 terminals
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Dieldrin 1 gal. of 18-1/2% 18
Lindane 1 gal. of 20% 27
Check ——— 189
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It will be seen that the reduction over the unsprayed blocks was about 90% with Dieldrin and 85% with Lindane.
For second brood sprays at Eldred materials were increased to about 8 times normal in hopes of getting better results. In this test 10 trees were selected in each block that could be reached moderately well and sprayed separately before the entire block was sprayed. Records were made the day before spraying, 3 days after spraying, and 10 days after spraying. Four materials were available, making five blocks with an unsprayed check. The results of these sprayings are given in Table 7.
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 —————————————————————————————————-