Ontario politicians shared the sentiment that the Kellogg plant closure is a disastrous day for London and Southwestern Ontario, but agreed on little else Tuesday.

"This is very bad news," Progressive Conservative leader Tim Hudak told the legislature, calling for the government to extend sittings for another week to deal with the jobs crisis.

Hudak listed a series of plants that have shut down their Ontario operations and put the production in the United States, including the Caterpillar plant in London, Heinz in Leamington, and John Deere in Welland.

"They are eating our lunch," Hudak said in demanding a new strategy from the government.

If Wynne can't come up with a strategy before Christmas, she is welcome to steal the Conservative platform, Hudak said.

Ontario Premier Kathleen Wynne brushed off the offer to extend the sitting of the legislature and said the Ontario minister of training, colleges and university is closely monitoring the situation and will be ready to assist the workers.

"Our first concern is the affected workers and the broader community," Wynne said.

She defended the Liberal government jobs strategy and attacked Hudak's calls for right to work legislation that will make union membership and paying dues voluntary.

"That will provoke a race to the bottom. We're not going there," Wynne said.

NDP leader Andrea Horwath said the Liberals have talked about the importance of food-processing jobs, but it's been all talk and no action.

"The blows to southwestern Ontario keep coming under this Liberal government," Horwath said in the legislature.

In a statement issued later Horwath said the Kellogg's announcement is another devastating blow for families in southwestern Ontario who have already had their share of bad news when it comes to lost jobs.

"New Democrats will make sure that workers are supported and that the government is held to account for a failed jobs strategy that's costing Londoners their livelihoods," Horwath said.

NDP MPP for London-Fanshawe Teresa Armstrong said the loss of Kellogg's will be an extremely devastating situation for the workers.

"It is truly despicable that this government once again is sitting on the sidelines while Londoners lose their jobs," Armstrong said.

Armstrong, who is the NDP critic for training, colleges and universities, said Ontario needs to offer industries incentives to remain in the province.

"If we are talking about having a good jobs plan we need to have tax credits for job creators, incentives for them to stay here and create jobs and build our communities," Armstrong said.