Journal of Taiwan Agricultural Research

Author:Yaw-Jen Dong and Pei-Chen Hsu*

Abstract:

This study demonstrated an indoor immersion method to test the impact of 12 biopesticides/non-registered environmentally friendly materials, including 10% citronella extract oil (Mold Stop), emulsified sunflower oil, neutralized phosphorous acid, lime sulfur mixture, Bordeaux mixture, potassium bicarbonate, 36% cinnamon extract oil microemulsifier (Black Asura), 40% cinnamon extract oil microemulsifier (Anthracnose Escape), plant oils mixture, neem oil, narrow-range oil, and Bacillus thuringiensis, on the eggs, larvae, pupae, and adults stages of both lacewing species, Mallada basalis Walker, and Mallada desjardinsi Navás. The experimental results showed that eight environmentally friendly materials, including Mold Stop, neutralized phosphorous acid, Bordeaux mixture, potassium bicarbonate, Black Shura, Anthracnose Escape, plant oils mixture, and B. thuringiensis, had no adverse effects on the eggs, larvae, pupae, and adults of both lacewing species. However, narrow-range oil, neem oil, emulsified sunflower oil, and lime sulfur mixture significantly caused higher mortality rates in the eggs, first-instar larvae, and pupae of the two lacewing species compared to the control group. M. basalis is one of the government-subsidized projects for farmers to purchase natural enemies, and commercially available products mainly consist of egg cards and larvae. According to the results of this experiment, farmers should avoid applying narrow-range oil, neem oil, emulsified sunflower oil, and lime sulfur mixture in the field where lacewing egg cards and larvae are released.

Key words:Mallada basalis, Mallada desjardinsi, Environmental friendly materials, Integrated pest management

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