scholarly journals Evaluation of Foliar Materials to Control Lepidopterous Larvae on Sweet Corn, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 97-97
Author(s):  
Brian A. Nault ◽  
John Speese
Keyword(s):  
Sweet Corn ◽  
Agricultural Research ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Fresh Market ◽  
Untreated Check ◽  
Extension Center

Abstract Sweet corn was planted on 30 May at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25-ft-long row, which was flanked by untreated guard rows, all separated by 3 ft space. There were 9 treatments plus an untreated check arranged in a RCB design with six replications. Two of the treatments were applied on a 5-6 d schedule (18, 25, and 31 Jul), whereas the remainder were applied on a 3-4-d schedule (18, 21, 25, 28, and 31 Jul). Materials were applied with a propane-powered backpack sprayer equipped with a single, hollow-cone nozzle/row calibrated to deliver 41 gal of spray/acre of 40 psi. Sprays were directed at the ears and were initiated when corn was in full silk. On 4 Aug, 15 ripe ears were taken from each plot and rated for damage as follows: fresh market (no damage), processing (no damage + damage only within 1.5 inches from the tip), cull (any damage between the base and 1.5 inches from the tip). The total numbers of live larvae of each species/15 ears were also counted.

scholarly journals Evaluation of New Foliar Materials to Control Insects on Potatoes, 1997

1998 ◽  
Vol 23 (1) ◽  
pp. 128-129
Author(s):  
Brian A. Nault ◽  
John Speese
Keyword(s):  
Agricultural Research ◽  
Visual Estimation ◽  
Eastern Shore ◽  
Bare Ground ◽  
Egg Masses ◽  
Insecticide Application ◽  
Untreated Check ◽  
Extension Center

Abstract Potatoes were planted on 3 Apr at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of four 20-ft-long rows. Plots were separated across rows by 3 ft and within rows by 6 ft of bare ground. The experiment had 5 treatments plus an untreated check arranged in a RCB design replicated 4 times. Insecticide application timings were targeted for control of CPB, not ECB. Initial applications were made on 29 May when small (LI + L2) and large (L3 + L4) CPB larvae were present and many of the egg masses in the field had hatched. One additional application of each treatment was made on 12 Jun. Insecticides were applied using a propane-powered backpack sprayer equipped with 6 flat-fan nozzles/2 rows calibrated to deliver 46 gpa at 40 psi. On 13 Jun and 1 Jul, potato leafhoppers, Empoascafabae, were controlled with Dimethoate 4EC at 0.25 lb (AI)/acre using a tractor-mounted sprayer that deliv-ered 40 gal. of spray/acre at 100 psi. Data were taken weekly from 3 through 30 Jun from the center 2 rows of each plot and included the following: the number of CPB adults, egg masses, small and large larvae/10 randomly selected stems in each plot, the number of ECB damaged stems/20 randomly chosen stems per plot, and a visual estimation of percent defoliation within each plot. The center 2 rows of each plot were harvested on 10 Jul and tubers were graded and weighed.

scholarly journals Comparison of Pymetrozine (Cga 215944) and Imidacloprid (Provado) Foliar Sprays to Control Aphids in Tomatoes, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 185-185
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Test Field ◽  
Single Application ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Potato Aphid ◽  
Single Row ◽  
Foliar Sprays ◽  
Extension Center ◽  
Aphid Populations

Abstract Tomatoes were transplanted on 9 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single row 20 ft X 5 ft, bordered on each side by an untreated guard row. On 1 Oct, heavy potato aphid populations developed in the test field. A pre-count of live aphids on 5 randomly picked compound leaves/plot was taken on this date and followed by a single application of all treatments. Treatments were applied with a backpack sprayer equipped with a 3 hollow cone nozzle boom and delivering 46 gal water/acre at 40 psi. To evaluate efficacy, the plots were sampled as previously described for the pre-count on the dates indicated in the table.

scholarly journals Foliar Sprays to Control Insects in Fall Peppers, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 136-137
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Plant Spacing ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Foliar Sprays ◽  
Marketable Fruit ◽  
Extension Center

Abstract Peppers were transplanted on 31 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25ft long rows with 3ft between row spacing and 1ft between plant spacing. Each plot was bordered on each side by an untreated guard row and replicated 4 times in a RCB design. Treatments were applied on the dates indicated in the table with a backpack sprayer using 3 hollow cone nozzles/row and delivering 60 gal water/acre at 40 psi. Evaluation criteria consisted of hand-harvest of marketable fruit on 10 healthy, uniform-sized plants/row (.00062 acre) and GPA counts on 5 randomly picked leaves/plot on 06 Oct. Harvesting was done in this manner due to uneven stands in some plots due to the drought.

scholarly journals Insecticides to Control Cucumber Beetles in Spring and Fall, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 130-130
Author(s):  
John Speese
Keyword(s):  
Heavy Rainfall ◽  
Agricultural Research ◽  
Evaluation Criteria ◽  
Eastern Shore ◽  
Bare Ground ◽  
Hollow Cone ◽  
Yield Data ◽  
Foliar Sprays ◽  
Extension Center ◽  
Spring Planting

Abstract Cucumbers were planted on 17 Jun and 12 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of 2 rows 25 ft long with 5 ft spacing between rows. Plots were separated from each other by 10 ft of bare ground. Treatments were replicated 4 times in a RCB. Prior to planting, the Admire and Furadan treatments were applied in furrow using a single nozzle boom backpack sprayer. The foliar sprays were applied with a 3 hollow cone nozzle boom backpack sprayer delivering 45 gpa at 40 psi. The Adios AG treatments were broadcast over the appropriate rows using a hand-held shaker on the same dates as the foliar sprays. Application dates were 18 and 24 Jul and 2 Aug for the spring planting and 30 Aug and 9 and 23 Sep for the fall planting. Evaluation criteria were: beetle counts on a 6 ft row section of each plot. Dates with significant differences are recorded in the tables. No attempt was made to obtain yield data, because the growth of the crop across the field was highly variable due to heavy rainfall, especially in the spring planting.

scholarly journals Control of Lepidopterous Pests on Cabbage, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 100-101
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Evaluation Criteria ◽  
Ovicidal Activity ◽  
Feeding Damage ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Extension Center

Abstract Cabbage was transplanted on 10 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25ft row with 3ft spacing between rows. Plots were separated from each other by untreated guard rows. Each treatment was replicated 4 times in a RCB design. Treatments were applied with a backpack sprayer using 3 hollow cone nozzles/row and delivering 60 gal water/acre .at 40 psi. Application dates were 30 Aug; 12, 19, and 26 Sep; 9 and 18 Oct. An additional V71639 application was made on 5 Sep, as early applications of this material are necessary for maximum ovicidal activity. Latron B-1956 was added to each treatment at 8oz/100 gal water. Evaluation criteria consisted of counts of all worm species present on 5 random plants/plot. Dates with high populations for each species are recorded in the table. On 26 Oct, 5 plants/plot were rated for feeding damage according to Greene et al. in J. Econ. Entomol. 62(4): 798-800. A rating greater than 3 is considered unmarketable.

scholarly journals Comparison of Viral, Bacteriological, and Standard Insecticides for Control of the Fruitworm Complex in Fall Tomatoes, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 189-190
Author(s):  
John Speese
Keyword(s):  
Disease Control ◽  
Agricultural Research ◽  
Row Spacing ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Extension Center

Abstract Tomatoes were transplanted into two fields on 27 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25ft row with 5ft between row spacing. Plots were replicated 3 times in a RCB design and separated from each other by untreated guard rows. The design in both fields was the same except for the number of treatments. Treatments were applied with a backpack sprayer using 3 hollow cone nozzles/row and delivering 45 gal waterlacre at 40 psi. Application dates for each field are indicated in the tables. Bravo 720 at 1.5pVacre was added to each treatment and the checks on 26 Sep and 02 Oct for disease control. On 9 Oct (Field I) and 16 Oct (Field 11). 25 green fruits were randomly picked from each plot and examined for worm damage.

scholarly journals Comparison of Various Classes of Foliar Insecticides for Worm Control in Fall Cabbage, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 79-79
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Evaluation Criteria ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Plot Sampling ◽  
Randomized Complete Block Design ◽  
Worm Control ◽  
Extension Center

Abstract Cabbage was transplanted in two fields on 10 Aug at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. In both fields, each plot consisted of a single 25 ft × 3 ft row, replicated four times in a randomized, complete block design. Plots were separated by untreated guard rows. Sprays were applied on the dates indicated in the tables using a 3 hollow cone nozzle boom backpack sprayer delivering 60 gal water/acre at 40 psi. Evaluation criteria consisted of counts of all worm species present and final market ratings on 5 randomly chosen plants/plot. Sampling dates for each field are indicated in the tables. Market ratings were estimated according to Greene et al. in J. Econ. Entomol. 62(4): 798-800. A rating greater than 3 is considered unmarketable.

scholarly journals Azadirachtin (Align) to Control CPB on Potatoes, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 126-126
Author(s):  
John Speese
Keyword(s):  
First Generation ◽  
Agricultural Research ◽  
Block Design ◽  
Evaluation Criteria ◽  
Row Spacing ◽  
Life Stages ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Extension Center

Abstract Potatoes were planted on 11 April at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of two 25 ft rows on 3 ft row spacing, replicated four times in a randomized, complete block design. An untreated guard row separated each plot. Admire 2F was applied in furrow preplanting using a single hollow cone nozzle boom backpack sprayer. Foliar sprays were applied on the dates indicated in the table using a 3 hollow cone nozzle boom backpack sprayer delivering 60 gal water/acre at 40 psi. On 21 and 23 Jun, the entire test was sprayed out with Vydate L at 0.50 lb(AI)/acre and Furadan 4F at 1.00 lb (AI)/acre to control first generation CPB adults. Evaluation criteria and spray decisions were based on weekly counts of all CPB life stages present on 10 random stems/plot. Sprays were applied if the following thresholds were exceeded: 4 small larvae, 1.5 large larvae, or 0.5 adults/stem. Percent defoliation for each plot was rated on 16 Jun and both rows of each plot were harvested and graded on 20 Jul to determine yields.

scholarly journals Use of Pymetrozine (CGA-215 944) to Control Cabbage Aphids in Collards, 1994

1995 ◽  
Vol 20 (1) ◽  
pp. 83-83
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Randomized Complete Block Design ◽  
Extension Center ◽  
Cabbage Aphids

Abstract This study was conducted in a commercial collards field planted on 17 Aug near the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25 ft × 3 ft row, bordered on each side by an untreated guard row, and replicated four times in a randomized, complete block design. Treatments were applied 15 Sep with a single hollow cone nozzle boom backpack sprayer delivering 60 gal water/acre at 40 psi and the total number of cabbage aphids was counted 20 and 28 Sep on 10 randomly picked leaves/plot.

scholarly journals Comparison of Biological and Standard Materials to Control Insects in Fall Tomatoes, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 188-189
Author(s):  
John Speese
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Evaluation Criteria ◽  
Eastern Shore ◽  
Hollow Cone ◽  
Ripe Fruit ◽  
Green Fruit ◽  
Randomized Complete Block Design ◽  
Control Disease ◽  
Extension Center

Abstract Tomatoes were transplanted on 27 Jul at the Eastern Shore Agricultural Research and Extension Center, Painter, VA. Each plot consisted of a single 25ft row with 5ft spacing between rows. An untreated guard row separated each plot. Treatments were replicated 4 times in a randomized, complete block design. Sprays were applied with a backpack sprayer using 3 hollow cone nozzles/row and delivering 45 gal water/acre at 40 psi. Applications were madeweekly from 12 Sep until 18 Oct with a total of 6 applications. Bravo 720 at 1.5pt/acre was added to the treatments and the check on 26 Sep and 2 and 9 Oct to control disease. Evaluation criteria consisted of counts of the number of worm damaged fruit per 25 random fruit/plot, and counts of PA numbers on 5 random compound leaves/plot. Sample dates are indicated in the table. Green fruit was picked on 9 Oct and mature green and ripe fruit was picked on 24 Oct.

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