Organic Farming

Aquino et al. (DA-CVIARC) evaluated the effectiveness of earwig, Euborella annulata, for the control of corn borer and other lepidopterous pests.

In Tuguegarao, control plots showed significant differences in the damage on corn plants. The damage on corn plants were higher during DS (1.13) than during WS (2.29).
Overall damage rating taken 70 days after planting showed that corn plants with earwigs exhibited zero to slight injury and had undamaged ears. Control plots, especially during wet season, showed corn plants with broken tassels and moderately damaged ears in all locations.
Larva, pupa, and tunnel count in the control plots were significantly higher in Tuguegarao City trials for both seasons. Those of Gamu, Isabela were high only during WS.
Yield was significantly higher in Treatment 3 (10,000 earwig/ha) compared with Treatment 2 (8,000 earwig/ha) in Gamu, Isabela and Tuguegarao City for both cropping seasons.
Highest ROI can be obtained in treatments where a higher earwig population is released.

Today is May 17, 2006
	Earwig: A new biological control agent for corn borer and other lepidopterous pests
	Aquino et al. (DA-CVIARC) evaluated the effectiveness of earwig, Euborella annulata, for the control of corn borer and other lepidopterous pests. Findings In Tuguegarao, control plots showed significant differences in the damage on corn plants. The damage on corn plants were higher during DS (1.13) than during WS (2.29). Overall damage rating taken 70 days after planting showed that corn plants with earwigs exhibited zero to slight injury and had undamaged ears. Control plots, especially during wet season, showed corn plants with broken tassels and moderately damaged ears in all locations. Larva, pupa, and tunnel count in the control plots were significantly higher in Tuguegarao City trials for both seasons. Those of Gamu, Isabela were high only during WS. Yield was significantly higher in Treatment 3 (10,000 earwig/ha) compared with Treatment 2 (8,000 earwig/ha) in Gamu, Isabela and Tuguegarao City for both cropping seasons. Highest ROI can be obtained in treatments where a higher earwig population is released. Source: PCARRD, 2004. Highlights 2003, Los Baños, Laguna.
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