Bacterial Wilt Resistant Cucumbers

Many cucumber varieties relatively tolerant of the bacteria spread by cucumber beetles are. I have found however that even with disease resistant varieties that here in NEPA bacterial wilt can be a common problem.

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Bacterial wilt resistant cucumbers. The pickling cucumber County Fair which is reported to be wilt resistant was substantially less susceptible to wilt than Dasher II and Calypso cucumbers most of which succumbed to wilt by late August says McGrath. Any other bitter-free variety will perform the same. Leaves eventually yellow and brown at the margins completely wither and die.

Angular Leaf Spot Downy Mildew Powdery Mildew Scab Cucumber Mosaic Virus Watermelon Mosaic Virus Strain 2 Zucchini Yellow Mosaic Virus. It is commonly transmitted by Cucumber Beetles they transport the bacteria and create wounds for it to enter the plant. Cucumbers are susceptible to a number of diseases.

Cucurbit downy mildew and bacterial wilt not only limit organic cucumber production in the Eastern US but also seriously impact conventional growers. Corynespora Leaf SpotBlight Cucumber Mosaic Virus Cucumber Vine Yellowing Virus Downy Mildew Powdery Mildew Scab Target Leaf Spot. Cucumber Disease Resistance Seeds.

Arkansas Little Leaf and Chipper arent actually resistant to bacterial wilt disease but they get infected a little later than some older varieties because they are bitter-free and thus arent as attractive to cucumber beetles. Watermelon is resistant to the disease and certain varieties. There are also varieties available with bacterial wilt resistance.

Management of bacterial wilt. Bacterial wilt overwinters in striped cucumber beetles who then feed on cucurbits in the spring when the insects emerge transmitting the disease in the process. Select varieties resistant to cucumber beetle feeding they have lower levels of the attractant compound cucurbitacin- Gemini Little Leaf-19 Saladin.

Bacterial wilt can cause severe losses in cucumbers and muskmelons. Stewarts Wilt Northern Corn Leaf Blight. Keep in mind that other disease insect pesticide or environmental factors can cause wilting of leaves and death of vines.

As far as how the bacteria interact with resistant varieties the mechanism isnt well understood. The bacteria overwinter in the gut of striped and spotted cucumber beetles. This vascular wilt disease is caused by the bacterium Erwinia tracheiphila and affects members of the cucurbit family including cucumber squash muskmelon pumpkin and gourds.

P seudomonas Erwinia species Bacterial Wilt is primarily a disease of the Cucurbits particularly cucumbers and melons though it can also attack the Solanum crops tomato pepper potato eggplant and corn. Bacterial Wilt Bacteria wilt is caused by the bacterial pathogen Erwinia tracheiphila which is vectored by the cucumber beetle. Downy mildew is caused by a fungus-like organism called an oomycete that overwinters in tropical and subtropical areas.

The pickling cucumber County Fair which is reported to be wilt resistant was substantially less susceptible to wilt than the other two varieties examined 7 wilted versus all Dasher II and Calypso plants wilted by 22 Aug. Other tips for controlling bacterial wilt include. Similar to pumpkin this was not due to differences in beetle attractiveness as there were no significant differences among cucumber varieties in number of beetlesplant or amount.

Keeping cucumber beetles out of your garden is the best. It is most damaging on cucumber and muskmelon less so on pumpkin and squash and not a considered problem on watermelon. Wilt progresses down the vine until the entire vine wilts or dies.

The only truly BW-resistant commercial variety is County Fair Hybrid. I would guess bacteria could still survive in resistant varieties but it isnt known for sure. One of the most serious is bacterial wilt that leads to sudden wilting and death of vines.

As for purging an area of the disease I dont think this would be possible as the disease is widespread and cucumber beetles are mobile enough where new beetles carrying bacterial wilt could enter the area. Control of the disease is dependent upon control of the cucumber beetle. Grow County Fair a cucumber cultivar with genetic resistance to bacterial wilt.

Bacterial Wilt Cucumber Mosaic Virus Downy Mildew Powdery Mildew Papaya Ringspot Virus Watermelon Mosaic Virus Strain 2 Zucchini Yellow Mosaic Virus.

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