Commentary: I want to caution against opposition to all chemical methods

 Albany resident Doug Johnson wrote a commentary on Albany’s opposition to a state pesticide spray program:

“I respect the extensive work put into the resolution to stop the LBAM eradication program, as well as the desire to protect the health of our community. I also believe agencies should take more steps to engage public review for proposed programs like this one.

However, as an environmental professional involved in invasive plant management, I also want to caution against opposition to all chemical methods. Counterintuitive as it may be, in some circumstances, such methods can have the lowest nontarget ecological impact.

We also need to be careful that we understand the full impacts of each pest. LBAM may be a threat to agriculture, but it may also be a threat to native ecosystems. Though it can be tempting to fit a pest like LBAM into the storyline of “industrial agriculture defending its financial interests at the expense of public health,” this may not be the whole story.

Finally, Integrated Pest Management (IPM) is defined as “a sustainable approach to managing pests by combining biological, cultural, physical and chemical tools in a way that minimizes economic, health, and environmental risks.” There is no filter that says, “chemical methods are inherently bad,” even if environmentalists may be inherently skeptical. Many natural resource managers employ herbicides as part of their IPM toolbox when controlling invasive plants, and the environment is better off because of it.

When working to control a pest, there should be full scientific evaluation of risks and benefits of all treatment strategies. Invasive species will continue to have a major impact on our state, and we will be called upon to make decisions on the best ways to prevent—and when necessary—to treat them.  Informed public involvement is essential to engage with the complexities of such issues.”

2 Responses to Commentary: I want to caution against opposition to all chemical methods

  1. Steve Shea says:

    I agree that IPM means that the particulars of each instance of chemical pest control (and of non-chemical pest control) need to be weighed on their merits.

    However, we have a history in this region, at least, of aerial spraying of malathion, which does have deleterious health consequences for humans. We are part of the “nontarget ecological impact,” I guess.

    It was, as I recall, opposition to general spraying of malathion and DDT that helped bring about IPM – based on the interest in uinintended consequences of spraying on humans, and in the case of DDT, on birds and fish.

    One of my concerns, and I’m not a scientist, is whether spraying for LBAM kills off natural predators, resulting in an explosion of LBAM populations (into a wider ecological niche) or the spread of nearby pests (into new ecological niches).

    We learned before, the hard way, that we can only trust officials to look out for us when we hold their feet to the fire. This lay-persons’ challenge is part of that process, and officials need to react with information and openness, not assurances or stonewalling.

    The cost of not reacting that way? Either more nontarget ecological consequences, greater public mistrust, or both.

  2. Catherine Sutton says:

    Dan Harder, respected UC Botanist and director of the UC Santa Cruz Arboretum says he has made extensive study of the light brown apple moth, and believes its current spread through nine counties has likely taken many years to achieve.

    Since CDFA admits there has been no damage to state agriculture by this moth so far, one wonders if it has already found natural predators in the environment.

    The “emergency status” that has been pushed upon us, to accept the mandatory aerial spraying, makes me think something is rotten in the state of California.

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