Have a personal or library account? Click to login
The Effects of Adjuvants on Steinernema Carpocapsae Efficacy Against Chrysodeixis Includens and Suspension Stability Cover

The Effects of Adjuvants on Steinernema Carpocapsae Efficacy Against Chrysodeixis Includens and Suspension Stability

Open Access
|Jan 2026

Figures & Tables

Figure 1:

Mean (±SEM) percentage IJs of S. carpocapsae observed at a 2 cm depth following cessation of stirring at set time intervals for treatments of Xanthan & Tween (A) and Barricade & Tween (B) at different concentrations. The same uppercase or lowercase letters indicate no significant differences among concentrations within the same time interval or across time intervals at the same concentration, respectively (Tukey's HSD test, α > 0.05). IJs, infective juveniles.
Mean (±SEM) percentage IJs of S. carpocapsae observed at a 2 cm depth following cessation of stirring at set time intervals for treatments of Xanthan & Tween (A) and Barricade & Tween (B) at different concentrations. The same uppercase or lowercase letters indicate no significant differences among concentrations within the same time interval or across time intervals at the same concentration, respectively (Tukey's HSD test, α > 0.05). IJs, infective juveniles.

Mortality (%±SEM) of fifth instars of C_ includens caused by S_ carpocapsae (all strain) with adjuvants 72 hr post-application under greenhouse conditions_

Trial1234
Temperature (°C)a20 (17–30)18 (13–27)19 (15–28)15 (12–29)
RH (%)a84 (79–99)66 (55–84)71 (67–99)71 (48–85)
Plant stageBeginning podPodingPodingPoding
High (cm)31.238.138.139.4

Sc + X + Tb100.0 ± 0.086.7 ± 3.3 a96.7 ± 3.3 a100.0 ± 0.0 a
Sc + B100.0 ± 0.046.7 ± 6.7 b96.7 ± 3.3 a73.3 ± 8.8 b
Sc100.0 ± 0.040.0 ± 5.8 b96.7 ± 3.3 a56.7 ± 12.0 b
Water0.0 ± 0.00.0 ± 0.0 c0.0 ± 0.0 b0.0 ± 0.0 c

F-value (3, 8) 19.7162.0761.16
P-value 0.0005<0.0001<0.0001

The effect of Barricade optimization on mortality (%±SEM) of C_ includens fifth instars caused by S_ carpocapsae (All strain) 72 hr post-application under greenhouse conditions_

Trial123
Temperature (°C)a20 (13–22)18 (16–36)20 (19–40)
RH (%)a54 (53–88)47 (16–78)53 (25–84)
Plant stageFifth trifoliolateSixth trifoliolateSeventh trifoliolate
High (cm)333646

Sc + 1.0%B + Tb90.0 ± 5.8 a40.0 ± 5.8 a26.7 ± 3.3 a
Sc + 0.3%B + T83.3 ± 6.7 ab36.7 ± 6.7 a44.1 ± 18.1 a
Sc + 1.0%B56.7 ± 3.3 bc10.0 ± 0.0 b10.8 ± 0.8 ab
Sc + 0.3%B36.7 ± 6.7 c6.7 ± 3.3 bc13.7 ± 8.8 ab
Sc63.3 ± 3.3 bc17.8 ± 3.4 ab20.0 ± 0.0 ab
Water0.0 ± 0.0 d0.0 ± 0.0 c0.0 ± 0.0 b

F-value (5, 12)38.6018.735.43
P-value<0.0001<0.00010.0077

Mortality (%±SEM) of fifth instars of C_ includens following 1 hr, 4 hr, 8 hr, or 24 hr of exposure to S_ carpocapsae (all strain) with adjuvants, assessed at 24 hr and 72 hr post-application under laboratory conditions (25°C, 85% RH)_

Exposure (hr)Treatment24 hr mortality72 hr mortality
1Sc + X + Ta48.3 ± 9.8 A, a88.3 ± 3.1 A, b
Sc + B26.7 ± 6.7 AB, b73.3 ± 8.8 AB, b
Sc8.3 ± 1.7 BC, a53.3 ± 6.1 B, b
Water + X + T0.0 ± 0.0 C, a1.7 ± 1.7 C, a
Water + B0.0 ± 0.0 C, a0.0 ± 0.0 C, a
Water0.0 ± 0.0 C, a0.0 ± 0.0 C, a

4Sc + X + T53.3 ± 11.7 A, a100.0 ± 0.0 A, a
Sc + B56.7 ± 3.3 A, a93.3 ± 2.1 A, ab
Sc5.0 ± 2.2 B, a68.3 ± 8.7 B, b
Water + X + T0.0 ± 0.0 B, a0.0 ± 0.0 C, a
Water + B0.0 ± 0.0 B, a0.0 ± 0.0 C, a
Water0.0 ± 0.0 B, a1.7 ± 1.7 C, a

8Sc + X + T56.7 ± 14.3 A, a100.0 ± 0.0 A, a
Sc + B56.7 ± 5.6 A. a96.7 ± 2.1 A, ab
Sc3.3 ± 2.1 B, a76.7 ± 7.1 B, b
Water + X + T0.0 ± 0.0 B, a1.7 ± 1.7 C, a
Water + B0.0 ± 0.0 B, a1.7 ± 1.7 C, a
Water0.0 ± 0.0 B, a0.0 ± 0.0 C, a

24Sc + X + T80.0 ± 11.3 A, a100.0 a ± 0.0 A, a
Sc + B71.7 ± 8.3 A, a98.3 a ± 1.7 A, a
Sc26.7 ± 9.9 B, a96.7 a ± 2.1 A, a
Water + X + T0.0 ± 0.0 C, a0.0 ± 0.0 B, a
Water + B0.0 ± 0.0 C, a0.0 ± 0.0 B, a
Water0.0 ± 0.0 C, a0.0 ± 0.0 B, a
DOI: https://doi.org/10.2478/jofnem-2025-0063 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
Language: English
Submitted on: Sep 19, 2025
|
Published on: Jan 31, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2026 Minling Zhang, Nathan R. Spaulding, Gadi V. P. Reddy, David I. Shapiro-Ilan, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.