Soil:

Hecla sandy loam, and Embden sandy loam; pH=7.2; 2.9% organic matter; soil-P and soil-K were very high; soil-S was low.

Previous crops:

2001 - soybean; 2000 - potato; 1999 - carrot.

Seedbed

preparation:

Coulter chiseled 15 inches deep on April 18. Multiweeded (field cultivated) on May 16 to smooth the seedbed.

Planting:

Pumpkin seeds planted 1 ft apart in rows on 8 ft centers on May 16. On June 12, thinned to an in-row spacing of one plant every 3 ft.

Plots:

Plots were 20 ft long by 8 ft (one row) wide. The study had 4 reps.

Fertilizer:

On April 18, broadcast 18 lbs N/acre and 20 lbs S/acre as 21-0-0-24. Side dressed 50 lbs N/acre as urea on June 13.

Irrigation:

Surface drip irrigation as needed.

Pest

control:

Weed control treatments are given in Table 50. Because of no rain after planting, the area was lightly cultivated on May 22 to activate the herbicides. Sprayed Asana (8 oz/acre on June 10, 18, 25, and July 2) and Ambush (8 oz/acre on July 11 and 30) to control cucumber beetle.

Harvest:

Hand harvested on Sept 17 and 18.

Herbicide

Rates

July 8 weed ratings

Yield

Number of fruit

Head size

Rrpw¹

Colq¹

Hns¹

Ebns¹

----------------------- 0 to 10² ------------------------

tons/acre

1000s/acre

lbs/fruit

Authority

3 oz

7.5 c

7.8 b

6.3 b

8.3 b

7.9 c

1.4 c

11.8

Outlook

1 pt

 9.0 ab

 7.3 b

 5.8 b

 9.8 a

 9.1 c

1.8 bc

10.2

Raptor

5 oz

 7.2 c

 6.6 b

 5.4 b

 9.0 ab

12.8 ab

2.4 ab

11.1

Authority + Raptor

2 oz + 4 oz

 8.3 bc

 7.8 b

 7.0 b

 9.5 a

10.7 bc

2.0 abc

10.8

Outlook + Raptor

1 pt + 4 oz

 9.8 a

 6.8 b

 7.8 b

10.0 a

13.0 ab

2.4 ab

10.9

Hand weed

10.0 a

10.0 a

10.0 a

10.0 a

15.8 a

2.7 a

12.0

Probability

0.004

0.02

0.007

0.04

0.0013

0.047

0.73

C.V. (%)

11

16

20

8

18

25

16