Changes on the Use of Chlorpyrifos

Adapted from Maryland State Horticulture Society Newsletter

After several years of debate in Annapolis to ban the use of this product in Maryland, the final decisions was made to allow the phase out of this product. The manufacturer will discontinue production of this product. Instead of an outright ban, MDA has developed the phase out process which is listed below. This can be found on page 442 of the Maryland Register, Volume 47, Issue 8 dated April 10, 2020.

.02 General Requirements for Applying or Recommending Pesticides.

A.—D. (text unchanged)

  1. Restrictions on Use of Insecticides that Contain Chlorpyrifos.

(1) Aerial Applications Prohibited. A person may not conduct an aerial application of any insecticide containing Chlorpyrifos in the State.

(2) Other Applications Generally Prohibited After December 31, 2020.

(a) Except as provided in §E(2)(b) and (c) of this regulation, after December 31, 2020, a person may not apply an insecticide containing Chlorpyrifos or seeds that have been treated with Chlorpyrifos in the State for any use.

(b) Fruit Trees and Snap Bean Seeds. Until June 30, 2021, a person may use an insecticide containing Chlorpyrifos or seeds that have been treated with Chlorpyrifos in the State to treat snap bean seeds and the trunks and lower limbs of fruit trees. After June 30, 2021, such applications are prohibited unless authorized by the Secretary under §E(2)(c) of this regulation.

(c) Limited Particular Use Authorization. After December 31, 2020, a person may file a written application with the Department requesting authorization to use an insecticide that contains Chlorpyrifos or seeds that have been treated with Chlorpyrifos for a particular use. If the Secretary has determined that there are no effective alternatives for the particular use noted in the application, the Secretary may authorize such use for a specified period of time, which may not extend beyond December 31, 2021.

(3) Establishment of Committee. The Secretary shall establish a committee, with members appointed by the Secretary, to determine alternatives to using Chlorpyrifos or seeds that have been treated with Chlorpyrifos, which shall dissolve on December 31, 2021.

This allows the use of this product as listed above. Please note the important dates. Until June 30, 2021, a person may use an insecticide containing Chlorpyrifos or seeds that have been treated with Chlorpyrifos in the State to treat snap bean seeds and the trunks and lower limbs of fruit trees. After June 30,2021, such applications are prohibited unless authorized by the Secretary under §E(2)(c) of this regulation. Use these products carefully .

 

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