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Efficacy of petroleum spray oils in management of powdery mildew in garden pea

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Research Paper 01/08/2017
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Efficacy of petroleum spray oils in management of powdery mildew in garden pea

John Kamathi Kiige, Patrick Muthee Ngore
Int. J. Agron. Agri. Res.11( 2), 14-21, August 2017.
Certificate: IJAAR 2017 [Generate Certificate]
Key: Disease incidenceEfficacyGarden peaMineral oilsPowdery mildewSeverity

Abstract

Garden pea (Pisum sativum) is an important vegetable grown in Kenya, for both domestic and export market. Its production is hindered by diseases such as powdery mildew (Erysiphe polygoni), mainly controlled using chemicals. There has been a food safety concernon the use of chemical pesticides to control pests such as fungal diseases. The use of alternative methods of disease control in food production has been recommended. This study aimed at evaluating the efficacy of petroleum oils in the control of powdery mildew in garden peas. The Study was conducted for two seasons at Countrywide Connections Limited between September to December 2016 and January to April 2017. A randomized complete block design with four replications was used. The treatments were; 0.3% v/v DC-Tron NR, 0.5 % v/v DC-Tron NR and 1.0 % v/v DC-Tron NR, propineb and cymoxanil (Milraz 76 WP WP 76) and distilled water (control). Data was collected on green seed yield, disease incidence and severity. The data was tested for variance using GenStat 12.1 version. Separation of means was done using the least significant difference at 5% confidence level. Results indicated that 1% mineral oil performed best in inhibiting disease incidence and severity and increasing green seed yield as compared to the other treatments. The highest disease incidence and severity was observed in the control treatment. The findings of this study showed that 1% mineral oil may be used as alternative to chemical fungicides in management of powdery mildew in garden pea production.

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