Here's a summary courtesy of puella, but as usual keep in mind there are bound to be inaccuracies since it's not based on the original Japanese:
Isidro comments that the scythes the scarecrows are using have a long reach, and how that makes it a piece of cake for him to defeat them. Azan curses at them: "damn heaps of straw!" while Roderick orders his men to protect the ladies. The three witches comment on how the group is too strong and won't be stopped by these defenses. One of them asks "the guy in black... is that a giant sword?" while another says that (s)he now thinks (s)he can sense a magical aura coming from the group. Another one says that it's cannot be! Humans coming from outside the island surely must be barbarous. They decide to give them some real trouble, commenting that the field won't be dealt with that easily.
Isidro immediately notices that vines are ensnaring his feet. Puck says that now that he thinks about it, the field can indeed perform such a trick, much to Isidro's anger considering the dire situation he's in. Isidro voices how annoying this is getting while Serpico says it really is like a magic island. Guts adds that despite how this looks, there's still a lot of time left till the harvest festival.
As Isidro lies bound to the floor, Puck remarks that of course it was bound to happen to him if he rolled on the floor.
Azan says it's endless, and Roderick observes that they'll be forced to retreat little by little. Schierke intervenes, telling them it's Ok, and apologizing for keeping them waiting. She dispels the enchantment. She explains: "This field has been enchanted using the power of "Nom"
(unsure of the name), the spirit of the land. So I altered that spell a bit, so that it would follow its original function, to "induce a good harvest".
The witches are astonished that the scarecrows were destroyed, and wonder what they should do and whether magic was used. They then receive a mental message telling them: "You can't even do such a thing right!" Meanwhile, Puck savors some much deserved pumpkin, while Roderick is relieved that "the vociferous welcoming is over". But Isidro notices something in the distance, and Guts breaks to them that another welcoming party is on its way. Schierke recognizes it as a wicker man. Something she's read about before. There was an incantation in ancient magic where you would put a living sacrifice in a giant doll and burn them together. The incantation would use that living power.
A new witch appears, telling the others they're really soft. Her name is something like "Molder" but this is absolutely not confirmed and can't be at this point, so please keep that in mind. The witches exclaim that she's brought out something taboo, but she replies that taboos exist to be used during this kind of occasions. She adds that it's not a problem to just keep it as a decoration, but that it's also a waste, and concludes that dolls are made to be played with. She then tells the golem to go and destroy Guts & co. The witches strongly object, calling her an idiot and saying that even the field will be destroyed. But then Guts takes care of business.
I suppose that was what was animating the scarecrows and pumpkins too, which is cool.
No, it's a completely different kind of magic.
A new witch appears, telling the others they're really soft. Her name is something like "Molder" but this is absolutely not confirmed and can't be at this point, so please keep that in mind.
Regarding the new witch's name, I wonder if it might not be an Arthurian reference, something like "Mordred". Completely random guess though, we'll have to wait until we see the Japanese for it in order to be sure. As for the character herself, I think she'll be a great foil for Schierke. A flamboyant, extrovert girl (her robe doesn't exactly look standard issue) with no regard for rules. It'll be very interesting to see their interactions.
On a side note, I think the wicker man was tapping into a power similar to that of the Blaze Wheel (fire + the eyes + human karma). Cool stuff.