Crustaceans control

Chitosan Crustaceans (controlled enzymatic degradation of shells) Thickening for paints cosmetics, make-up, diet products... 

Larvae of fathead minnows had dose-dependent growth inhibition (controls grew 8.3% and high-dose group 3.1%) and seemed related to reductions in crustacean and rotifer populations in the treated enclosures. Chlorpyrifos in high-dose enclosure was <3 pg/L at 96 h and <0.16 pg/L at day 30 (Brazner and Kline 1990)... 

The presence of sediments in diflubenzuron marine microcosms results in rapid removal from seawater and ultimately a reduction in mortality of larval crustaceans (Table 17.2) (Cunningham et al. 1987). But marine sediments that exceed 200 pg diflubenzuron/kg — levels normally encountered at application rates for control of salt marsh mosquitoes — could be detrimental to juvenile and adult crustaceans that consume detritus and organic matter on the surface of the marsh or at the water-sediment interface (Cunningham and Myers 1986 Cunningham et al. 1987). 

Since diflubenzuron toxicity seems to be similar in both insects and crustaceans, extreme care must be taken when this compound and other chitin synthesis inhibitors are used for insect control in areas where aquatic crustaceans occur. Otherwise, ecological instability may result, with consequences... 

Certain birds, mammals, and crustaceans must be classified as rice pests. In California the tadpole shrimp (Apus oryzaphagus) (29) may damage rice. The shrimp not only attack the young rice plants but keep the water in a muddy condition, which results in poor rice growth. Promising control results were obtained in the laboratory with copper sulfate and DDT, and in the field with copper sulfate. 

Petitions by the National Fisheries Institute for approval of irradiation treatment to control food-borne pathogens in raw or processed crustaceans are pending at the regulatory authorities in the United States [70]. 

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