Effect of Imidacloprid Tree Treatments on the Occurrence of Formosan Subterranean Termites, <I>Coptotermes formosanus</I> Shiraki (Isoptera: Rhinotermitidae), in Independent Monitors

Abstract

Periodic sampling of 87 independent monitors, initially active with the Formosan subterranean termite, Coptotermes formosanus Shiraki, was conducted. Monitors, located in eight sectors adjacent to seven buildings, were various distances (1-46 m) from 57 trees treated with 0.1% imidacloprid foam. Termites collected from six of the eight sectors showed latent mortality attributed to imidacloprid intoxication at all monitor-tree distances. Approximately 6 mo after treatment, termite populations had recovered in these sectors. Another sector showed termite population suppression for approximately 15 mo, followed by recovery. Imidacloprid tree treatments did not control C. formosanus populations in independent monitors adjacent to the treatments.

Effects of plant latex based anti-termite formulations on Indian white termite &lt;i&gt;Odontotermes obesus&lt;/i&gt; (Isoptera: Odontotermitidae) in sub-tropical high infestation areas

“…All such insecticidal actions of latex are due to presence of different bio-chemicals of diverse biological activity [5]. Similarly, natural amides such as nootkatone [70], valencenoid derivatives [71], imidacloprid [72] deter feeding in termites and suppress adult survival [73]. Moreover, larch wood flavonoids [74] and stilbene rich compounds such as piceid (3,4,5-trihydroxystilbene glucoside), isorhapontin (3-methoxy-3,4,5 trihydroxystilbene-3-d-glucoside) and astringin (3,3,4,5-tetrahydroxystilbene-3-d-glucoside) isolated from bark of Picea glehnii also deter termites at a very low concentration 0.63 to 2.5 µmol/disc [75].…”

A Review of the Evolution of Termite Control: A Continuum of Alternatives to Termiticides in the United States with Emphasis on Efficacy Testing Requirements for Product Registration

“…There is evidence of toxicant transfer with nonrepellent termiticides and resulting effects on behavior [90][91][92][93], but the degree of importance to termite suppression in field populations is equivocal. Nonrepellent termiticides can suppress termite populations and protect structures [94] likely due to termites coming into direct contact with treatments, but they have not consistently demonstrated elimination of populations from an area [95][96][97].…”