Baythroid XL(beta-cyfluthrin)

General Information

Baythroid XL has contact and ingestion activity. It is toxic to many kinds of insects with a relatively long duration of impact from residues.This and other pyrethroid insecticides (Group 3) should not be used mid-season because they kill predatory insects that help to keep aphids, psyllids, thrips, and spider mites in check. Baythroid XL is not systemic or translaminar, but residues should persist for 7-14 days. Re-apply if needed to protect new foliage. Make only two consecutive applications before rotating to an insecticide with a different MOA. Similar products with beta-cyfluthrin are available but use rates vary.

Usage for Baythroid XL

---

Stage of Development: Emergence to Row Closure
Pest or Disease	MOA1	Efficacy2	Rate per Acre3	REI4	PHI5	Notes
Aphid (various species)	3	F-P	2.8 fl oz	12 h	0 d	Apply before aphid populations build, but only if it’s before mid-June. Not very effective for aphids.
Armyworms, Cutworms, Loopers (various genera, Lepidoptera)	3	G	1.6 to 2.8 fl oz	12 h	0 d	Apply when small caterpillars are present, but only if it’s before mid-June.
Beet Leafhopper (Circulifer tenellus)	3	G	0.8-1.6 fl oz	12 h	0 d	Apply in May and/or early-to-mid June if BLH populations are building.
Colorado Potato Beetle (Leptinotarsa decemlineata)	3	G	1.6-2.8 fl oz	12 h	0 d	Apply at 50% egg hatch while larvae are small, but only if it’s before mid-June.
Lygus Bugs (Lygus species)	3	G	See Label fl oz	12 h	0 d	Lygus bugs are on the label but not in the potato section. Apply when nymphs are present if it’s before mid-June.
Potato Psyllid (Bactericera cockerelli)	3	G (n+a)	1.6-2.8 fl oz	12 h	0 d	Apply when adult psyllids are migrating into the field and it’s before mid-June. If early nymphs are present, it may not control nymphs on the underside of leaves where the product is not well distributed.

¹Mode of action. NC = not classified..
² Efficacy ratings denote the relative ability of a pesticide to control its target. The ratings are E = excellent, G = good, F = fair/suppression; P = poor, and ND = no data. Efficacy ratings are based on the inherent toxicity of the pesticide against its target, the likelihood that the target will contact or ingest the product as applied, duration of impact on the target, and undesired effects, such as negative impacts on natural enemies that could lead to future pest outbreaks.
³ Rate per acre per application. Refer to the product label for maximum use rate per season.
⁴ Reentry interval.
⁵The minimum pre-harvest interval. Some products do not list PHI.
Note: always read and follow the directions on the pesticide label.

 

Stage of Development: Tuber Bulking
Pest or Disease	MOA1	Efficacy2	Rate per Acre3	REI4	PHI5	Notes
Aphid (various species)	3	P	2.8 fl oz	12 h	0 d	Use of pyrethroid insecticides is not recommended mid-season. Not very effective for aphids. If used, apply before aphid populations build. Monitor for subsequent pest outbreaks.
Armyworms, Cutworms, Loopers (various genera, Lepidoptera)	3	P	1.6 to 2.8 fl oz	12 h	0 d	Pyrethroid insecticides should not be applied mid-season. If used, apply when small caterpillars are present. Monitor for subsequent pest outbreaks.
Colorado Potato Beetle (Leptinotarsa decemlineata)	3	P	1.6-2.8 fl oz	12 h	0 d	Use of pyrethroid insecticides is not recommended mid-season. If used, apply when larvae are small. Monitor for subsequent pest outbreaks.
Lygus Bugs (Lygus species)	3	P	See Label fl oz	12 h	0 d	Lygus bugs are on the label but not in the potato section. Use of pyrethroid insecticides is not recommended mid-season. If used, apply when nymphs are present. Monitor for subsequent pest outbreaks.
Potato Psyllid (Bactericera cockerelli)	3	P	1.6-2.8 fl oz	12 h	0 d	Use of pyrethroid insecticides is not recommended mid-season. If used, apply when psyllids are present. It may not control nymphs on the underside of leaves where the product is not well distributed. Monitor for subsequent pest outbreaks.

¹Mode of action. NC = not classified..
² Efficacy ratings denote the relative ability of a pesticide to control its target. The ratings are E = excellent, G = good, F = fair/suppression; P = poor, and ND = no data. Efficacy ratings are based on the inherent toxicity of the pesticide against its target, the likelihood that the target will contact or ingest the product as applied, duration of impact on the target, and undesired effects, such as negative impacts on natural enemies that could lead to future pest outbreaks.
³ Rate per acre per application. Refer to the product label for maximum use rate per season.
⁴ Reentry interval.
⁵The minimum pre-harvest interval. Some products do not list PHI.
Note: always read and follow the directions on the pesticide label.

 

Stage of Development: Late Tuber Bulking to Harvest
Pest or Disease	MOA1	Efficacy2	Rate per Acre3	REI4	PHI5	Notes
Colorado Potato Beetle (Leptinotarsa decemlineata)	3	G	1.6-2.8 fl oz	12 h	0 d	Apply at 50% egg hatch while larvae are small.
Potato Psyllid (Bactericera cockerelli)	3	G (n+a)	1.6-2.8 fl oz	12 h	0 d	Apply when psyllids are present.
Tuberworm (Phthorimaea operculella)	3	E	1.6-2.8 fl oz	12 h	0 d	Target PTW larvae feeding in the canopy in the weeks prior to vine desiccation or harvest. Baythroid XL has a 0-day PHI.

¹Mode of action. NC = not classified..
² Efficacy ratings denote the relative ability of a pesticide to control its target. The ratings are E = excellent, G = good, F = fair/suppression; P = poor, and ND = no data. Efficacy ratings are based on the inherent toxicity of the pesticide against its target, the likelihood that the target will contact or ingest the product as applied, duration of impact on the target, and undesired effects, such as negative impacts on natural enemies that could lead to future pest outbreaks.
³ Rate per acre per application. Refer to the product label for maximum use rate per season.
⁴ Reentry interval.
⁵The minimum pre-harvest interval. Some products do not list PHI.
Note: always read and follow the directions on the pesticide label.