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Agronomy Guide

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Figure 2.1-1. Percentage of alfalfa fields with above-threshold weevil infestation in Maryland, 1983 to 1989, and Pennsylvania, 1986 to 1989.

Figure 2.1-2. Percentage of fields with threshold levels of alfalfa weevil across locations in New York in 1988.

Figure 2.1-3. Relationship between the economic injury level and the economic threshold with changing economic and biological conditions.

Figure 2.2-1. Key periods of corn insect pests

Figure 2.2-2. Conversion of row applied (T-band or infurrow) soil insecticides expressed in ounces per 1,000 feet of row to pounds per acre formulated material for any row spacing

Figure2.4-1. Key periods of soybean insect pests in Pennsylvania

Figure 2.5-1. Growth stages in cereals when herbicides may be applied

Figure 2.5-2. Key periods of small grain insect pests in Pennsylvania

Figure 2.6-1. Key periods of forage insect pests in Pennsylvania

Spray nozzle selection calculation

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