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Introduction

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643<br />

Field Scouting in Lentils<br />

• Grasshoppers<br />

º When and How to Monitor: Look for when monitoring fields from the early bud stage through pod development.<br />

º Economic Threshold: 2 grasshoppers/m 2 during the flowering and podding stages, especially if two-striped<br />

grasshopper is the dominant species.<br />

• Lygus Bugs<br />

º When and How to Monitor: Look for adult lygus bugs when monitoring lentils during blooming and podding by<br />

using a sweep net, making 25 180° sweeps in at least 5 randomly selected places in a field.<br />

º Economic Threshold: Insecticide treatment is recommended when 10 or more adults are collected per 25 sweeps.<br />

• Pea aphid<br />

º Economic Threshold: 30-40 aphids per 180° sweep of a 38 cm (15 inch) diameter insect net, and few natural<br />

enemies are present, and when aphid numbers do not decline over a 2-day period.<br />

Lentil Insect Management Chart<br />

Insect<br />

Insecticide<br />

(and insecticide group 1 )<br />

Rate/Acre<br />

Preharvest<br />

interval (days)<br />

Belowground and Surface Feeders<br />

Application<br />

(A=aerial;<br />

G=ground)<br />

LD 50<br />

(Mammalian<br />

Toxicity) 2<br />

Wireworms Cruiser Maxx Vibrance<br />

A seed treatment containing Cruiser 5FS and Vibrance Maxx RFC.<br />

Pulses (N)<br />

Cruiser 5FS (N) 17-50 ml / May be applied on-farm or by commercial seed treaters.<br />

100 kg seed<br />

Stress Shield 600 (N)<br />

Seed Treatment<br />

Cutworms Coragen (D) 101 ml 1 A or G >5,000<br />

Decis 5EC/Poleci (P)<br />

80 ml (Decis)<br />

162 ml (Poleci)<br />

30 A or G 395<br />

Matador/Silencer (P) 34 ml 14 (Matador)<br />

21 (Silencer)<br />

A or G 64-110<br />

Pounce/Perm-UP (P)<br />

Ambush (P)<br />

Chlorpyrifos<br />

(for pale western<br />

cutworm only) (OP)<br />

73-158 ml<br />

57-121 ml<br />

Treat prior to<br />

6-leaf stage<br />

G 1030<br />

0.354-0.486 L 21-60 A or G 205-418<br />

Sap and Fluid Feeders<br />

Lygus Bugs Matador/Silencer (P) 34 ml 14 (Matador)<br />

21 (Silencer)<br />

Potato<br />

Leafhopper<br />

Matador/Silencer (P) 34 ml 14 (Matador)<br />

21 (Silencer)<br />

A or G 64-110<br />

A or G 64-110<br />

Pea Aphid Movento 75-111 ml 7 G >2,000<br />

Matador/Silencer (P) 34-94 ml 14 (Matador)<br />

A or G 64-110<br />

21 (Silencer)<br />

Voliam Xpress (D+P) 202 ml 14 A or G 98<br />

Defoliators<br />

Grasshoppers Coragen (D) 51-101 ml 1 A or G >5,000<br />

Decis 5E /Poleci (P) Decis: 40-60 ml<br />

(ground),<br />

60 ml (air)<br />

Poleci: 81-121 ml<br />

(ground), 121 ml (air)<br />

30 A or G 395<br />

Insect Control

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